Change Unit.multiplier type from decimal to float

Remove remnants related to BigDecimal.

.gitea/workflows/test.yml

@@ -1,74 +0,0 @@
-name: Tests
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-
-jobs:
-  test-sqlite:
-    name: Tests (SQLite)
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: '3.3'
-          bundler-cache: true
-        env:
-          BUNDLE_WITH: "sqlite:development:test"
-
-      - name: Set up test database
-        run: bin/rails db:create db:schema:load
-        env:
-          RAILS_ENV: test
-
-      - name: Run tests
-        run: bin/rails test
-        env:
-          RAILS_ENV: test
-          CI: "true"
-
-  test-mysql:
-    name: Tests (MySQL)
-    runs-on: ubuntu-latest
-
-    services:
-      mysql:
-        image: mysql:8.0
-        env:
-          MYSQL_ROOT_PASSWORD: ""
-          MYSQL_ALLOW_EMPTY_PASSWORD: "yes"
-          MYSQL_DATABASE: fixin_test
-        ports:
-          - 3306:3306
-        options: >-
-          --health-cmd="mysqladmin ping"
-          --health-interval=10s
-          --health-timeout=5s
-          --health-retries=3
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: '3.3'
-          bundler-cache: true
-        env:
-          BUNDLE_WITH: "mysql:development:test"
-
-      - name: Set up test database
-        run: bin/rails db:schema:load
-        env:
-          RAILS_ENV: test
-          DB_ADAPTER: mysql
-
-      - name: Run tests
-        run: bin/rails test
-        env:
-          RAILS_ENV: test
-          CI: "true"
-          DB_ADAPTER: mysql

.gitignore

@@ -15,6 +15,9 @@
 /config/master.key
 /config/puma.rb
 
+# Ignore test database.
+/db/test.sqlite3
+
 # Ignore all logfiles and tempfiles.
 /log/*
 /tmp/*
@@ -30,7 +33,7 @@
 
 /tmp/restart.txt
 
-# Ignore user files
+# Ignore user files.
 /.bash_history
 /.byebug_history
 /.config
@@ -38,6 +41,7 @@
 /.lesshst
 /.local
 /.mysql_history
+/.sqlite_history
 /.ssh
 /.vim
 /.viminfo

DESIGN.md

@@ -0,0 +1,59 @@
+DESIGN
+======
+
+Below is a list of design decisions. The justification is to be consulted
+whenever a change is considered, to avoid regressions.
+
+### Data type for DB storage of numeric values (`decimal` vs `float`)
+
+* among database engines supported (by Rails), SQLite offers storage of
+  `decimal` data type with the lowest precision, equal to the precision of
+  `REAL` type (double precision float value, IEEE 754), but in a floating point
+  format,
+    * decimal types in other database engines offer greater precision, but store
+      data in a fixed point format,
+* biology-related values differ by several orders of magnitude; storing them in
+  fixed point format would only make sense if required precision would be
+  greater than that offered by floating point format,
+    * even then, fixed point would mean either bigger memory requirements or
+      worse precision for numbers close to scale limit,
+        * for a fixed point format to use the same 8 bytes of storage as IEEE
+          754, precision would need to be limited to 18 digits (4 bytes/9 digits)
+          and scale approximately half of that - 9,
+    * double precision floating point guarantees 15 digits of precision, which
+      is more than enough for all expected use cases,
+        * if a decimal string with at most 15 significant digits is converted to
+          the IEEE 754 double-precision format, giving a normal number, and then
+          converted back to a decimal string with the same number of digits, the
+          final result should match the original string,
+        * if an IEEE 754 double-precision number is converted to a decimal
+          string with at least 17 significant digits, and then converted back to
+          double-precision representation, the final result must match the
+          original number,
+        * single precision floating point only guarntees 6 digits of precision,
+          which is estimated to be too low for some use cases (e.g. storing
+          latitude/longitude with a resolution grater than 100m),
+* double precision floating point (IEEE 754) is a standard that ensures
+  compatibility with majority of database engines,
+    * the same data format is used internally by Ruby as a `Float`; it
+      guarantees no conversions between storage and computation,
+    * as a standard with hardware implementations ensures both: computing
+      efficiency and hardware/3rd party library compatibility as opposed to Ruby
+      custom `BigDecimal` type,
+    * at present, only normalized numbers are used and considered sufficient, in
+      order to avoid potential issues with the cross-platform compatibility of
+      subnormal (denormal) numbers,
+* in the future, the IEEE 754 decimal64 data type may be considered once it is
+  supported by database engines.
+
+### Database layer vs application layer data model constraints
+
+* database constraints are the final guard against data integrity corruption,
+    * they should safeguard against data referential integrity loss under _all_
+      data (not schema) manipulation scenarios, including application level
+      logic errors and direct data manipulation (e.g. through `dbconsole`),
+* application constraints can be as restrictive as database constraints or more,
+  but not less, as it doesn't serve any use case,
+    * proper application level constraints should prevent unhandled database
+      exception occurences, e.g `ActiveRecord::InvalidForeignKey` for operations
+      performed through Models (i.e. not `#delete_all` etc.)

Gemfile

@@ -1,14 +1,18 @@
 source "https://rubygems.org"
 
 # The requirement for the Ruby version comes from Rails
-gem "rails", "~> 7.2.3"
+# NOTE: after updating Rails make sure that schema dump is not sorted:
+#   v8.1.3/activerecord/lib/active_record/schema_dumper.rb#L195
+# Waiting for this change to be reverted/configuration setting added:
+# https://github.com/rails/rails/pull/56842, https://github.com/rails/rails/pull/55414
+gem "rails", "~> 8.1.3"
 gem "sprockets-rails"
 gem "puma", "~> 6.0"
 gem "sassc-rails"
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem "tzinfo-data", platforms: %i[ mingw mswin x64_mingw jruby ]
 
-# TODO: select db gems automatically
+# TODO: select db gems automatically?
 #   database_config = ERB.new(File.read("config/database.yml")).result
 #   YAML.load(database_config, aliases: true).values.map { |env| env["adapter"] }.uniq
 group :mysql, optional: true do
@@ -42,11 +46,4 @@ group :test do
   # Use system testing [https://guides.rubyonrails.org/testing.html#system-testing]
   gem "capybara"
   gem "selenium-webdriver"
-
-  # Remove minitest version restriction after error fixed:
-  #   railties-7.2.3/lib/rails/test_unit/line_filtering.rb:7:in `run':
-  #     wrong number of arguments (given 3, expected 1..2) (ArgumentError)
-  #   from /var/www/.gem/ruby/3.3.0/gems/minitest-6.0.2/lib/minitest.rb:473:in
-  #     `block (2 levels) in run_suite'
-  gem "minitest", "< 6"
 end

Gemfile.lock

@@ -1,85 +1,85 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (7.2.3)
+    action_text-trix (2.1.18)
-      actionpack (= 7.2.3)
+      railties
-      activesupport (= 7.2.3)
+    actioncable (8.1.3)
+      actionpack (= 8.1.3)
+      activesupport (= 8.1.3)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
       zeitwerk (~> 2.6)
-    actionmailbox (7.2.3)
+    actionmailbox (8.1.3)
-      actionpack (= 7.2.3)
+      actionpack (= 8.1.3)
-      activejob (= 7.2.3)
+      activejob (= 8.1.3)
-      activerecord (= 7.2.3)
+      activerecord (= 8.1.3)
-      activestorage (= 7.2.3)
+      activestorage (= 8.1.3)
-      activesupport (= 7.2.3)
+      activesupport (= 8.1.3)
       mail (>= 2.8.0)
-    actionmailer (7.2.3)
+    actionmailer (8.1.3)
-      actionpack (= 7.2.3)
+      actionpack (= 8.1.3)
-      actionview (= 7.2.3)
+      actionview (= 8.1.3)
-      activejob (= 7.2.3)
+      activejob (= 8.1.3)
-      activesupport (= 7.2.3)
+      activesupport (= 8.1.3)
       mail (>= 2.8.0)
       rails-dom-testing (~> 2.2)
-    actionpack (7.2.3)
+    actionpack (8.1.3)
-      actionview (= 7.2.3)
+      actionview (= 8.1.3)
-      activesupport (= 7.2.3)
+      activesupport (= 8.1.3)
-      cgi
       nokogiri (>= 1.8.5)
-      racc
+      rack (>= 2.2.4)
-      rack (>= 2.2.4, < 3.3)
       rack-session (>= 1.0.1)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.6)
       useragent (~> 0.16)
-    actiontext (7.2.3)
+    actiontext (8.1.3)
-      actionpack (= 7.2.3)
+      action_text-trix (~> 2.1.15)
-      activerecord (= 7.2.3)
+      actionpack (= 8.1.3)
-      activestorage (= 7.2.3)
+      activerecord (= 8.1.3)
-      activesupport (= 7.2.3)
+      activestorage (= 8.1.3)
+      activesupport (= 8.1.3)
       globalid (>= 0.6.0)
       nokogiri (>= 1.8.5)
-    actionview (7.2.3)
+    actionview (8.1.3)
-      activesupport (= 7.2.3)
+      activesupport (= 8.1.3)
       builder (~> 3.1)
-      cgi
       erubi (~> 1.11)
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.6)
-    activejob (7.2.3)
+    activejob (8.1.3)
-      activesupport (= 7.2.3)
+      activesupport (= 8.1.3)
       globalid (>= 0.3.6)
-    activemodel (7.2.3)
+    activemodel (8.1.3)
-      activesupport (= 7.2.3)
+      activesupport (= 8.1.3)
-    activerecord (7.2.3)
+    activerecord (8.1.3)
-      activemodel (= 7.2.3)
+      activemodel (= 8.1.3)
-      activesupport (= 7.2.3)
+      activesupport (= 8.1.3)
       timeout (>= 0.4.0)
-    activestorage (7.2.3)
+    activestorage (8.1.3)
-      actionpack (= 7.2.3)
+      actionpack (= 8.1.3)
-      activejob (= 7.2.3)
+      activejob (= 8.1.3)
-      activerecord (= 7.2.3)
+      activerecord (= 8.1.3)
-      activesupport (= 7.2.3)
+      activesupport (= 8.1.3)
       marcel (~> 1.0)
-    activesupport (7.2.3)
+    activesupport (8.1.3)
       base64
-      benchmark (>= 0.3)
       bigdecimal
       concurrent-ruby (~> 1.0, >= 1.3.1)
       connection_pool (>= 2.2.5)
       drb
       i18n (>= 1.6, < 2)
+      json
       logger (>= 1.4.2)
       minitest (>= 5.1)
       securerandom (>= 0.3)
       tzinfo (~> 2.0, >= 2.0.5)
-    addressable (2.8.8)
+      uri (>= 0.13.1)
+    addressable (2.9.0)
       public_suffix (>= 2.0.2, < 8.0)
     base64 (0.3.0)
-    bcrypt (3.1.21)
+    bcrypt (3.1.22)
-    benchmark (0.5.0)
+    bigdecimal (4.1.2)
-    bigdecimal (4.0.1)
     bindex (0.8.1)
     builder (3.3.0)
     byebug (13.0.0)
@@ -93,28 +93,27 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
-    cgi (0.5.1)
     concurrent-ruby (1.3.6)
     connection_pool (3.0.2)
     crass (1.0.6)
     date (3.5.1)
-    devise (5.0.2)
+    devise (5.0.3)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
       railties (>= 7.0)
       responders
       warden (~> 1.2.3)
     drb (2.2.3)
-    erb (6.0.2)
+    erb (6.0.4)
     erubi (1.13.1)
-    ffi (1.17.3-aarch64-linux-gnu)
+    ffi (1.17.4-aarch64-linux-gnu)
-    ffi (1.17.3-aarch64-linux-musl)
+    ffi (1.17.4-aarch64-linux-musl)
-    ffi (1.17.3-arm-linux-gnu)
+    ffi (1.17.4-arm-linux-gnu)
-    ffi (1.17.3-arm-linux-musl)
+    ffi (1.17.4-arm-linux-musl)
-    ffi (1.17.3-arm64-darwin)
+    ffi (1.17.4-arm64-darwin)
-    ffi (1.17.3-x86_64-darwin)
+    ffi (1.17.4-x86_64-darwin)
-    ffi (1.17.3-x86_64-linux-gnu)
+    ffi (1.17.4-x86_64-linux-gnu)
-    ffi (1.17.3-x86_64-linux-musl)
+    ffi (1.17.4-x86_64-linux-musl)
     globalid (1.3.0)
       activesupport (>= 6.1)
     i18n (1.14.8)
@@ -124,13 +123,14 @@ GEM
       activesupport (>= 6.0.0)
       railties (>= 6.0.0)
     io-console (0.8.2)
-    irb (1.17.0)
+    irb (1.18.0)
       pp (>= 0.6.0)
       prism (>= 1.3.0)
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
+    json (2.19.4)
     logger (1.7.0)
-    loofah (2.25.0)
+    loofah (2.25.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
     mail (2.9.0)
@@ -142,10 +142,12 @@ GEM
     marcel (1.1.0)
     matrix (0.4.3)
     mini_mime (1.1.5)
-    minitest (5.27.0)
+    minitest (6.0.6)
+      drb (~> 2.0)
+      prism (~> 1.5)
     mysql2 (0.5.7)
       bigdecimal
-    net-imap (0.6.3)
+    net-imap (0.6.4)
       date
       net-protocol
     net-pop (0.1.2)
@@ -155,21 +157,21 @@ GEM
     net-smtp (0.5.1)
       net-protocol
     nio4r (2.7.5)
-    nokogiri (1.19.1-aarch64-linux-gnu)
+    nokogiri (1.19.3-aarch64-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.19.1-aarch64-linux-musl)
+    nokogiri (1.19.3-aarch64-linux-musl)
       racc (~> 1.4)
-    nokogiri (1.19.1-arm-linux-gnu)
+    nokogiri (1.19.3-arm-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.19.1-arm-linux-musl)
+    nokogiri (1.19.3-arm-linux-musl)
       racc (~> 1.4)
-    nokogiri (1.19.1-arm64-darwin)
+    nokogiri (1.19.3-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.19.1-x86_64-darwin)
+    nokogiri (1.19.3-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.19.1-x86_64-linux-gnu)
+    nokogiri (1.19.3-x86_64-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.19.1-x86_64-linux-musl)
+    nokogiri (1.19.3-x86_64-linux-musl)
       racc (~> 1.4)
     orm_adapter (0.5.0)
     pg (1.6.3)
@@ -186,32 +188,32 @@ GEM
     psych (5.3.1)
       date
       stringio
-    public_suffix (7.0.2)
+    public_suffix (7.0.5)
     puma (6.6.1)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (3.2.5)
+    rack (3.2.6)
-    rack-session (2.1.1)
+    rack-session (2.1.2)
       base64 (>= 0.1.0)
       rack (>= 3.0.0)
     rack-test (2.2.0)
       rack (>= 1.3)
     rackup (2.3.1)
       rack (>= 3)
-    rails (7.2.3)
+    rails (8.1.3)
-      actioncable (= 7.2.3)
+      actioncable (= 8.1.3)
-      actionmailbox (= 7.2.3)
+      actionmailbox (= 8.1.3)
-      actionmailer (= 7.2.3)
+      actionmailer (= 8.1.3)
-      actionpack (= 7.2.3)
+      actionpack (= 8.1.3)
-      actiontext (= 7.2.3)
+      actiontext (= 8.1.3)
-      actionview (= 7.2.3)
+      actionview (= 8.1.3)
-      activejob (= 7.2.3)
+      activejob (= 8.1.3)
-      activemodel (= 7.2.3)
+      activemodel (= 8.1.3)
-      activerecord (= 7.2.3)
+      activerecord (= 8.1.3)
-      activestorage (= 7.2.3)
+      activestorage (= 8.1.3)
-      activesupport (= 7.2.3)
+      activesupport (= 8.1.3)
       bundler (>= 1.15.0)
-      railties (= 7.2.3)
+      railties (= 8.1.3)
     rails-dom-testing (2.3.0)
       activesupport (>= 5.0.0)
       minitest
@@ -219,29 +221,28 @@ GEM
     rails-html-sanitizer (1.7.0)
       loofah (~> 2.25)
       nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
-    railties (7.2.3)
+    railties (8.1.3)
-      actionpack (= 7.2.3)
+      actionpack (= 8.1.3)
-      activesupport (= 7.2.3)
+      activesupport (= 8.1.3)
-      cgi
       irb (~> 1.13)
       rackup (>= 1.0.0)
       rake (>= 12.2)
       thor (~> 1.0, >= 1.2.2)
       tsort (>= 0.2)
       zeitwerk (~> 2.6)
-    rake (13.3.1)
+    rake (13.4.2)
     rdoc (7.2.0)
       erb
       psych (>= 4.0.0)
       tsort
-    regexp_parser (2.11.3)
+    regexp_parser (2.12.0)
     reline (0.6.3)
       io-console (~> 0.5)
     responders (3.2.0)
       actionpack (>= 7.0)
       railties (>= 7.0)
     rexml (3.4.4)
-    rubyzip (3.2.2)
+    rubyzip (3.3.0)
     sassc (2.4.0)
       ffi (~> 1.9)
     sassc-rails (2.1.2)
@@ -251,7 +252,7 @@ GEM
       sprockets-rails
       tilt
     securerandom (0.4.1)
-    selenium-webdriver (4.41.0)
+    selenium-webdriver (4.43.0)
       base64 (~> 0.2)
       logger (~> 1.4)
       rexml (~> 3.2, >= 3.2.5)
@@ -265,32 +266,32 @@ GEM
       actionpack (>= 6.1)
       activesupport (>= 6.1)
       sprockets (>= 3.0.0)
-    sqlite3 (2.9.0-aarch64-linux-gnu)
+    sqlite3 (2.9.3-aarch64-linux-gnu)
-    sqlite3 (2.9.0-aarch64-linux-musl)
+    sqlite3 (2.9.3-aarch64-linux-musl)
-    sqlite3 (2.9.0-arm-linux-gnu)
+    sqlite3 (2.9.3-arm-linux-gnu)
-    sqlite3 (2.9.0-arm-linux-musl)
+    sqlite3 (2.9.3-arm-linux-musl)
-    sqlite3 (2.9.0-arm64-darwin)
+    sqlite3 (2.9.3-arm64-darwin)
-    sqlite3 (2.9.0-x86_64-darwin)
+    sqlite3 (2.9.3-x86_64-darwin)
-    sqlite3 (2.9.0-x86_64-linux-gnu)
+    sqlite3 (2.9.3-x86_64-linux-gnu)
-    sqlite3 (2.9.0-x86_64-linux-musl)
+    sqlite3 (2.9.3-x86_64-linux-musl)
     stringio (3.2.0)
     thor (1.5.0)
     tilt (2.7.0)
-    timeout (0.6.0)
+    timeout (0.6.1)
     tsort (0.2.0)
     turbo-rails (2.0.23)
       actionpack (>= 7.1.0)
       railties (>= 7.1.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
+    uri (1.1.1)
     useragent (0.16.11)
     warden (1.2.9)
       rack (>= 2.0.9)
-    web-console (4.2.1)
+    web-console (4.3.0)
-      actionview (>= 6.0.0)
+      actionview (>= 8.0.0)
-      activemodel (>= 6.0.0)
       bindex (>= 0.4.0)
-      railties (>= 6.0.0)
+      railties (>= 8.0.0)
     websocket (1.2.11)
     websocket-driver (0.8.0)
       base64
@@ -315,11 +316,10 @@ DEPENDENCIES
   capybara
   devise
   importmap-rails
-  minitest (< 6)
   mysql2 (~> 0.5)
   pg (~> 1.5)
   puma (~> 6.0)
-  rails (~> 7.2.3)
+  rails (~> 8.1.3)
   sassc-rails
   selenium-webdriver
   sprockets-rails

README.md

@@ -16,14 +16,10 @@ environment, see the _Contributing_ section below.
 * Server side:
     * Ruby interpreter, depending on the version of Rails used (see _Gemfile_),
         * https://guides.rubyonrails.org/upgrading_ruby_on_rails.html#ruby-versions
-    * database (e.g. MySQL >= 8.0) supporting:
+    * database (e.g. SQLite, MySQL >= 8.0) supporting:
         * recursive Common Table Expressions (CTE) for SELECT/UPDATE/DELETE,
             * MariaDB does not support CTE for UPDATE/DELETE
               (https://jira.mariadb.org/browse/MDEV-18511)
-        * decimal datatype with precision of at least 30,
-            * SQLite3 _flexible typing_ decimal will work, but precision
-              will be limited to 16, making it practical mostly for testing
-              purposes
     * for testing: browser as specified in _Client side_ requirements
 * Client side:
     * browser (e.g. Firefox >= 121) supporting:
@@ -89,14 +85,10 @@ Running
 
 ### Standalone Rails server + Apache proxy
 
-Customize Puma config template:
+Copy and customize Puma config template if required:
 
     cp -a config/puma.rb.dist config/puma.rb
 
-and specify server IP/port, either with `port` or `bind`, e.g.:
-
-    bind 'tcp://0.0.0.0:3000'
-
 #### (option 1) Start server manually
 
     bundle exec rails s -e production
@@ -123,9 +115,10 @@ Contributing
 
 ### Gems
 
-Apart from database adapter, install development and testing gems:
+Install development and testing gems, including at least MySQL and SQLite
+database adapters:
 
-    bundle config --local with mysql development test
+    bundle config --local with development test mysql sqlite
 
 ### Configuration
 
@@ -138,20 +131,29 @@ assets.
 
 ### Database
 
-Grant database user privileges for development and test environments,
+Grant database user privileges for development and test environments. Example
-possibly with different Ruby versions:
+below shows how to grant privileges to all databases which names start with
+`fixinme-` on MySQL:
 
     > mysql -p
     mysql> create user `fixinme-dev`@localhost identified by '<some password>';
     mysql> grant all privileges on `fixinme-%`.* to `fixinme-dev`@localhost;
     mysql> flush privileges;
 
+Dumping development data before database reset:
+
+    mysqldump -h <address> -u <user> -p --no-create-info --no-tablespaces --complete-insert <database> > tmp/data.sql
+
 ### Development environment
 
 Starting application server in development environment:
 
     bundle exec rails s -e development
 
+Accessing database console when more than one test db is present:
+
+    bundle exec rails dbconsole -e test --db sqlite3
+
 For running rake tasks, prepend command with environment:
 
     RAILS_ENV=development bundle exec rails ...
@@ -164,14 +166,22 @@ Tests need to be run from within toplevel application directory:
 
         bundle exec rails test:system
 
-* system test(s) with seed/test name specified:
+* system test(s) with seed or test name specified:
 
-        bundle exec rails test:system --seed 64690 --name test_add_unit
+        bundle exec rails test:system --include test_add_unit --seed 64690
 
-* all tests from one file, with optional seed:
+* all tests from one file, optionally with seed:
 
         bundle exec rails test test/system/users_test.rb --seed 1234
 
+* system tests for selected database configuration (if multiple present):
+
+        bundle exec rails test:system --include /^test_sqlite3_/
+
+* single system test for all database configurations (if multiple present):
+
+        bundle exec rails test:system --include /^test_\\w+_add_unit$/
+
 ### Icons
 
 Pictogrammers Material Design Icons: https://pictogrammers.com/library/mdi/

app/assets/stylesheets/application.css

@@ -18,14 +18,12 @@
 /* Strive for simplicity:
  * * style elements/tags only - if possible,
  * * replace element/tag name with class name - if element has to be styled
- * differently depending on context (e.g. <form>; <a> as link/button),
+ * differently depending on context (e.g. <form>, <table>, <a> as link/button),
  * * styles with multiple selectors should have all selectors with same
  * specificity, to allow proper rule specificity vs order management.
  *
  * NOTE: style in a modular way, similar to how CSS @scope would be used,
  * to make transition easier once @scope is widely available. */
-/* TODO: review styles with multiple selectors and try to convert them to the same
- * specificity. */
 :root {
   --color-focus-gray: #f3f3f3;
   --color-border-gray: #dddddd;
@@ -57,8 +55,19 @@
 :focus-visible {
   outline: none;
 }
-
+/* NOTE: move to higher priority layer instead of using !important?; add CSS
-/* [hidden] submit elements cannot have `display` set as it makes them visible. */
+ * @layer requirements in README */
+[disabled] {
+  border-color: var(--color-border-gray) !important;
+  color: var(--color-border-gray) !important;
+  /* NOTE: cannot set cursor when `pointer-events: none`; can be fixed by setting
+   * `cursor` on wrapping element.
+  cursor: not-allowed; */
+  fill: var(--color-border-gray) !important;
+  pointer-events: none !important;
+}
+/* Styles set `display` without distinguishing between [hidden] elements, making
+ * them visible. */
 [hidden] {
   display: none !important;
 }
@@ -69,10 +78,13 @@
  *  gray - target for interaction with keyboard,
  *  red - destructive, non-undoable action.
  */
+/* TODO: merge selectors using :is() */
+a,
 button,
 details,
 input,
 select,
+summary,
 textarea {
   background-color: inherit;
   font: inherit;
@@ -90,14 +102,14 @@ textarea {
   border-radius: 0.25em;
   padding: 0.2em 0.4em;
 }
-[name=cancel],
+svg {
-.auxiliary {
+  height: 1.4em;
-  border-color: var(--color-border-gray);
+  margin: 0 0.2em 0 0;
-  color: var(--color-nav-gray);
+  width: 1.4em;
-  fill: var(--color-nav-gray);
+}
+svg:last-child {
+  margin-right: 0;
 }
-input[type=checkbox],
-svg,
 textarea {
   margin: 0;
 }
@@ -115,11 +127,12 @@ input[type=checkbox]:checked {
   appearance: checkbox;
   -webkit-appearance: checkbox;
 }
-/* Hide spin buttons in input number fields */
+/* Hide spin buttons of <input type=number>. */
-/* TODO: add spin buttons inside input[number]: before (-) and after (+) input */
+/* TODO: add spin buttons inside <input type=number>: before (-) and after (+) input. */
 input[type=number] {
   appearance: textfield;
   -moz-appearance: textfield;
+  text-align: end;
 }
 input::-webkit-inner-spin-button {
   -webkit-appearance: none;
@@ -128,6 +141,30 @@ input::-webkit-outer-spin-button {
   -webkit-appearance: none;
   margin: 0;
 }
+/* Text color of table form controls:
+ *  - black for row/table forms,
+ *  - inherited for internal (column specific) buttons/forms. */
+table input,
+table select,
+table summary,
+table textarea {
+  border-color: var(--color-border-gray);
+}
+table input,
+table select,
+table textarea {
+  padding-block: 0.375em;
+}
+table form input,
+table form select,
+table form summary,
+table form textarea {
+  color: inherit;
+}
+table svg:not(:only-child) {
+  height: 1.25em;
+  width: 1.25em;
+}
 input:focus-visible,
 select:focus-visible,
 select:focus-within,
@@ -136,6 +173,7 @@ summary:focus-visible,
 textarea:focus-visible {
   accent-color: var(--color-dark-blue);
   background-color: var(--color-focus-gray);
+  color: black;
 }
 input:hover,
 select:hover,
@@ -146,8 +184,15 @@ textarea:hover {
 }
 select:hover,
 summary:hover {
+  color: black;
   cursor: pointer;
 }
+/* TODO: style <details>/<summary> focus to match <select> as much as possible.
+summary:focus-visible::before,
+summary:hover::before {
+  background-color: black;
+}
+ */
 input:invalid,
 select:invalid,
 textarea:invalid {
@@ -181,20 +226,21 @@ textarea:invalid {
   padding: 0.6em 0.5em;
   width: fit-content;
 }
-[name=cancel],
+.link {
+  color: inherit;
+  text-decoration: underline 1px var(--color-border-gray);
+  text-underline-offset: 0.25em;
+}
 .auxiliary {
-  border-color: var(--color-border-gray);
+  border-color: var(--color-nav-gray);
   color: var(--color-nav-gray);
   fill: var(--color-nav-gray);
 }
-.button > svg,
+table .button {
-.tab > svg {
+  border-color: var(--color-border-gray);
-  height: 1.4em;
+  font-weight: normal;
-  width: 1.4em;
+  height: 100%;
-}
+  padding: 0.4em;
-.button > svg:not(:last-child),
-.tab > svg:not(:last-child) {
-  margin-right: 0.2em;
 }
 .button:focus-visible,
 .tab:focus-visible,
@@ -211,13 +257,12 @@ textarea:invalid {
   background-color: var(--color-red);
   border-color: var(--color-red);
 }
-/* TODO: move normal, non-button links (<a>:hover/:focus) styling here (i.e.
+.link:focus-visible {
- * page-wide, top-level) and remove from `table.items` - as the style should be
+  text-decoration-color: var(--color-gray);
- * same everywhere. */
+}
-input[type=text]:read-only,
+.link:hover {
-textarea:read-only {
+  color: var(--color-blue);
-  border: none;
+  text-decoration-color: var(--color-blue);
-  padding-inline: 0;
 }
 
 
@@ -230,16 +275,16 @@ body {
   grid-template-areas:
     "header    header  header"
     "nav       nav     nav"
-    "leftside  topside rightside"
     "leftside  main    rightside";
   grid-template-columns: 1fr minmax(max-content, 2fr) 1fr;
   font-family: system-ui;
   margin: 0.4em;
 }
-body:not(:has(.topside-area)) {
+body:has(> .topside-area) {
   grid-template-areas:
     "header    header  header"
     "nav       nav     nav"
+    "leftside  topside rightside"
     "leftside  main    rightside";
 }
 
@@ -313,20 +358,20 @@ header {
   line-height: 2.2em;
   pointer-events: auto;
 }
-.flash:before {
+.flash::before {
-  filter: invert();
+  filter: invert(1);
   height: 1.4em;
   margin: 0 0.5em;
   width: 1.4em;
 }
-.flash.alert:before {
+.flash.alert::before {
   content: url('pictograms/alert-outline.svg');
 }
 .flash.alert {
   border-color: var(--color-red);
   background-color: var(--color-red);
 }
-.flash.notice:before {
+.flash.notice::before {
   content: url('pictograms/check-circle-outline.svg');
 }
 .flash.notice {
@@ -346,7 +391,6 @@ header {
 }
 
 
-/* TODO: Hover over invalid should work like in measurements (thin vs thick border) */
 .labeled-form {
   align-items: center;
   display: grid;
@@ -383,85 +427,82 @@ header {
 .labeled-form .auxiliary {
   grid-column: 3;
   /* If more buttons are needed, `grid-row` can be replaced with
-   * `reading-flow: grid-columns` to ensure proper tabindex order */
+   * `reading-flow: grid-columns` to ensure proper [tabindex] order. */
   grid-row: 1;
   height: 100%;
   padding-block: 0;
 }
 
+.tabular-form table {
+  border: none;
+  border-spacing: 0;
+}
+.tabular-form table td {
+  border: none;
+  padding-inline-start: 0.4em;
+  vertical-align: middle;
+}
+.tabular-form table td:first-child {
+  padding-inline-start: 0;
+}
+.tabular-form table td:last-child {
+  padding-inline-end: 0;
+}
+.tabular-form table :is(form, input, select, textarea):only-child {
+  margin-inline-start: 0;
+}
 
-/* TODO: remove `.items` class (?) and make `form table` work properly. */
+
-table.items {
+.items-table {
   border-spacing: 0;
   border: 1px solid var(--color-border-gray);
   border-radius: 0.25em;
   font-size: 0.85rem;
   text-align: left;
 }
-table:not(:has(tr)) {
+.items-table thead {
-  display: none;
-}
-table.items thead {
   font-size: 0.8rem;
 }
-table.items thead,
+.items-table thead,
-table.items tbody tr:hover {
+.items-table tbody tr:hover {
   background-color: var(--color-focus-gray);
 }
-table.items th {
+.items-table th {
-  padding-block: 0.75em;
+  padding: 0.75em 0 0.75em 1em;
   text-align: center;
 }
-table.items th,
+.items-table th:last-child {
-table.items td {
-  padding-inline: 1em 0;
-}
-/* For <a> to fill <td> completely, we use an `::after` pseudoelement. */
-table.items td.link {
-  padding: 0;
-  position: relative;
-}
-table.items td.link a {
-  color: inherit;
-  font: inherit;
-}
-table.items td.link a::after {
-  content: '';
-  inset: 0;
-  position: absolute;
-}
-table.items td:first-child {
-  padding-inline-start: calc(1em + var(--depth) * 0.8em);
-}
-table.items td:has(input, select, textarea) {
-  padding-inline-start: calc(0.6em - 0.9px);
-}
-table.items td:first-child:has(input, select, textarea) {
-  padding-inline-start: calc(0.6em + var(--depth) * 0.8em - 0.9px);
-}
-table.items th:last-child {
   padding-inline-end: 0.4em;
 }
-table.items td:last-child {
+.items-table td {
-  padding-inline-end: 0.1em;
-}
-table.items td {
   border-top: 1px solid var(--color-border-gray);
   height: 2.4em;
-  padding-block: 0.1em;
+  padding: 0.1em 0 0.1em calc(1em + var(--depth) * 0.8em);
 }
-table.items .actions {
+.items-table td:last-child {
-  display: flex;
+  padding-inline-end: 0.1em;
+}
+.items-table :is(form, input, select, textarea):only-child {
+  margin-inline-start: calc(-0.4em - 0.9px);
+}
+/* For <a> to fill table cell completely, we use an `::after` pseudoelement. */
+/* TODO: expand to whole row? will require adjusting z-index on inputs/buttons */
+.items-table td:has(> .link) {
+  position: relative;
+}
+.items-table .link::after {
+  content: '';
+  inset: -1px 0 0 0;
+  position: absolute;
+}
+.items-table .flex {
   gap: 0.4em;
   justify-content: end;
 }
-table.items .actions.centered {
+.items-table .dropzone {
-  justify-content: center;
-}
-table.items tr.dropzone {
   position: relative;
 }
-table.items tr.dropzone::after {
+.items-table .dropzone::after {
   content: '';
   inset: 1px 0 0 0;
   position: absolute;
@@ -469,123 +510,57 @@ table.items tr.dropzone::after {
   outline-offset: -1px;
   z-index: var(--z-index-table-row-outline);
 }
-table.items td.handle {
+.items-table .handle {
-  cursor: move;
+  cursor: grab;
 }
-table.items tr.form td {
+.items-table .form td {
   vertical-align: top;
 }
-
+.items-table td:not(:first-child),
-/* TODO: replace `:hover:focus-visible` combos with proper LOVE style order. */
-/* TODO: update table styling: simplify selectors, deduplicate, remove non-font rem. */
-table.items td.link a:hover,
-table.items td.link a:focus-visible,
-table.items td.link a:hover:focus-visible {
-  text-decoration: underline;
-  text-decoration-thickness: 0.05rem;
-  text-underline-offset: 0.2rem;
-}
-table.items td.link a:hover {
-  color: var(--color-blue);
-}
-table.items td.link a:focus-visible {
-  text-decoration-color: var(--color-gray);
-}
-table.items td.link a:hover:focus-visible {
-  color: var(--color-dark-blue);
-}
-
-table.items td:not(:first-child),
 .grayed {
   color: var(--color-table-gray);
-  fill: var(--color-table-gray);
+  fill: var(--color-gray);
 }
-table.items svg {
+.items-table td:has(> svg:only-child) {
-  height: 1rem;
-  vertical-align: middle;
-  width: 1rem;
-}
-table.items svg:last-child {
-  height: 1.2rem;
-  width: 1.2rem;
-}
-table.items td.svg {
   text-align: center;
 }
-table.items td.number {
-  text-align: right;
-}
-table.items .button {
-  font-weight: normal;
-  height: 100%;
-  padding: 0.4em;
-}
-table.items input:not([type=submit]):not([type=checkbox]),
-table.items select,
-table.items textarea {
-  padding-block: 0.375em;
-}
-
-table input,
-table select,
-table summary,
-table textarea {
-  border-color: var(--color-border-gray);
-}
-table select {
-  color: var(--color-table-gray);
-}
-table select:hover,
-table select:focus-within,
-table select:focus-visible {
-  color: black;
-}
-table .button {
-  border-color: var(--color-border-gray);
-  color: var(--color-table-gray);
-}
 
 
-form table.items {
+.center {
-  border: none;
-}
-form table.items td {
-  border: none;
-  text-align: left;
-  vertical-align: middle;
-}
-form table.items td:first-child {
-  color: inherit;
-}
-form table select {
-  color: black;
-}
-
-
-.centered {
   margin: 0 auto;
 }
-.extendedright {
-  margin-right: auto;
-}
 .hexpand {
   width: 100%;
 }
-.hflex {
+.flex {
   display: flex;
   gap: 0.8em;
 }
-.hflex.centered {
+.flex.reverse {
-  justify-content: center;
+  flex-direction: row-reverse;
 }
-.vexpand {
+.flex.vertical {
-  width: 100%;
-}
-.vflex {
-  display: flex;
-  gap: 0.8em;
   flex-direction: column;
 }
+.hint {
+  color: var(--color-table-gray);
+  font-style: italic;
+  font-size: 0.9rem;
+  text-align: center;
+}
+.hmin50 {
+  min-width: 50%;
+}
+.italic {
+  color: var(--color-gray);
+  font-style: italic;
+}
+.ralign {
+  text-align: right;
+}
+.rextend {
+  margin-right: auto;
+}
 
 
 details {
@@ -596,12 +571,12 @@ summary {
   align-items: center;
   color: var(--color-gray);
   display: flex;
-  gap: 0.2em;
+  gap: 0.4em;
   height: 100%;
   white-space: nowrap;
 }
 summary::before {
-  background-color: #000;
+  background-color: currentColor;
   content: "";
   height: 1em;
   mask-image: url('pictograms/chevron-down.svg');
@@ -624,14 +599,14 @@ summary span {
   width: 100%;
 }
 details[open] summary::before {
-  transform: rotate(180deg);
+  transform: scaleY(-1);
 }
 summary::marker {
   padding-left: 0.25em;
 }
 /* NOTE: use `details[open]::details-content` once widely available. */
 details[open] ul {
-  background: white;
+  background-color: white;
   border: 1px solid var(--color-border-gray);
   border-radius: 0.25em;
   box-shadow: 1px 1px 3px var(--color-border-gray);
@@ -661,3 +636,8 @@ li::marker {
  * * focused label styling (currently only checkbox has focus),
  * * disabled checkbox blue square focus removal.
  * */
+
+#measurement_form {
+  min-width: 66%;
+  width: max-content;
+}

app/controllers/application_controller.rb

@@ -9,7 +9,6 @@ class ApplicationController < ActionController::Base
   helper_method :current_user_disguised?
   helper_method :current_tab
 
-  before_action :redirect_to_setup_if_needed
   before_action :authenticate_user!
 
   class AccessForbidden < StandardError; end
@@ -56,16 +55,6 @@ class ApplicationController < ActionController::Base
 
   private
 
-  # Redirect to the web setup wizard when the application has not yet been
-  # initialised (i.e. no admin account exists in the database).
-  def redirect_to_setup_if_needed
-    return if User.exists?(status: :admin)
-    redirect_to new_setup_path
-  rescue ActiveRecord::StatementInvalid
-    # Tables may not exist yet (migrations not run). Fall through and let the
-    # normal request handling surface a meaningful error.
-  end
-
   def render_no_content(record)
     helpers.render_errors(record)
     render html: nil, layout: true

app/controllers/measurements_controller.rb

@@ -1,13 +1,7 @@
 class MeasurementsController < ApplicationController
-  before_action except: :index do
-    raise AccessForbidden unless current_user.at_least(:active)
-  end
-
   def index
-    readouts = current_user.readouts.includes(:quantity, :unit).order(created_at: :desc)
+    @measurements = []
-    @measurements = readouts.group_by(&:created_at).map do |created_at, grouped|
+    #@measurements = current_user.units.ordered.includes(:base, :subunits)
-      Measurement.new(created_at: created_at, readouts: grouped)
-    end
   end
 
   def new
@@ -15,33 +9,8 @@ class MeasurementsController < ApplicationController
   end
 
   def create
-    timestamp = Time.current
-    @readouts = readout_params.map do |rp|
-      r = current_user.readouts.new(rp)
-      r.created_at = timestamp
-      r
-    end
-
-    if @readouts.all?(&:valid?)
-      Readout.transaction { @readouts.each(&:save!) }
-      @measurement = Measurement.new(readouts: @readouts, created_at: timestamp)
-      flash.now[:notice] = t('.success')
-    else
-      render :new, status: :unprocessable_entity
-    end
   end
 
   def destroy
-    @measurement = Measurement.new(id: params[:id].to_i,
-                                   created_at: Time.at(params[:id].to_i))
-    current_user.readouts.where(created_at: @measurement.created_at).delete_all
-    @measurements_empty = current_user.readouts.empty?
-    flash.now[:notice] = t('.success')
-  end
-
-  private
-
-  def readout_params
-    params.require(:readouts).map { |r| r.permit(:quantity_id, :value, :unit_id) }
   end
 end

app/controllers/readouts_controller.rb

@@ -1,23 +1,16 @@
 class ReadoutsController < ApplicationController
-  before_action :find_quantity, only: [:new, :discard]
+  before_action :find_quantities, only: [:new]
+  before_action :find_quantity, only: [:discard]
   before_action :find_prev_quantities, only: [:new, :discard]
 
   def new
-    new_quantities =
+    @quantities -= @prev_quantities
-      case params[:button]
+    # TODO: raise ParameterInvalid if new_quantities.empty?
-      when 'children'
+    @readouts = @quantities.map { |q| q.readouts.build }
-        @quantity.subquantities
-      when 'subtree'
-        @quantity.progenies
-      else
-        [@quantity]
-      end
-    new_quantities -= @prev_quantities
-    @readouts = current_user.readouts.build(new_quantities.map { |q| {quantity: q} })
 
     @user_units = current_user.units.ordered
 
-    quantities = @prev_quantities + new_quantities
+    quantities = @prev_quantities + @quantities
     @superquantity = current_user.quantities
       .common_ancestors(quantities.map(&:parent_id)).first
   end
@@ -31,6 +24,9 @@ class ReadoutsController < ApplicationController
 
   private
 
+  def find_quantities
+    @quantities = current_user.quantities.find(params[:quantity])
+  end
 
   def find_quantity
     @quantity = current_user.quantities.find_by!(id: params[:id])

app/controllers/setup_controller.rb

@@ -1,59 +0,0 @@
-# Handles the one-time web-based installation wizard.
-#
-# The wizard is only accessible when no admin account exists yet.  Once an
-# admin has been created the controller redirects every request to the root
-# path, so it can never be used to overwrite an existing installation.
-class SetupController < ActionController::Base
-  # Use the full application layout (header, flash, etc.) so the page looks
-  # consistent with the rest of the site.
-  layout "application"
-
-  before_action :redirect_if_installed
-
-  def new
-  end
-
-  def create
-    email    = params[:admin_email].to_s.strip
-    password = params[:admin_password].to_s
-    confirm  = params[:admin_password_confirmation].to_s
-
-    errors = []
-    errors << t(".email_blank")    if email.blank?
-    errors << t(".password_blank") if password.blank?
-    errors << t(".password_mismatch") if password != confirm
-
-    if errors.any?
-      flash.now[:alert] = errors.join("  ")
-      return render :new, status: :unprocessable_entity
-    end
-
-    user = User.new(email: email, password: password, status: :admin)
-    user.skip_confirmation!
-
-    unless user.save
-      flash.now[:alert] = user.errors.full_messages.join("  ")
-      return render :new, status: :unprocessable_entity
-    end
-
-    # Persist runtime settings chosen during setup.
-    Setting.set("skip_email_confirmation",
-                params[:skip_email_confirmation] == "1")
-
-    # Optionally seed the built-in default units.
-    if params[:seed_units] == "1"
-      load Rails.root.join("db/seeds/units.rb")
-    end
-
-    redirect_to new_user_session_path, notice: t(".success")
-  end
-
-  private
-
-  def redirect_if_installed
-    redirect_to root_path if User.exists?(status: :admin)
-  rescue ActiveRecord::StatementInvalid
-    # Tables are not yet migrated — stay on the setup page so the user sees a
-    # meaningful error rather than a crash.
-  end
-end

app/controllers/units_controller.rb

@@ -17,7 +17,7 @@ class UnitsController < ApplicationController
   end
 
   def create
-    @unit = current_user.units.new(unit_params)
+    @unit = current_user.units.new(params.expect(Unit::ATTRIBUTES))
     if @unit.save
       @before = @unit.successive
       flash.now[:notice] = t('.success', unit: @unit)
@@ -30,7 +30,7 @@ class UnitsController < ApplicationController
   end
 
   def update
-    if @unit.update(unit_params.except(:base_id))
+    if @unit.update(params.except(:base_id).expect(Unit::ATTRIBUTES))
       flash.now[:notice] = t('.success', unit: @unit)
     else
       render :edit
@@ -40,11 +40,11 @@ class UnitsController < ApplicationController
   # TODO: Avoid double table width change by first un-hiding table header,
   # then displaying index, e.g. by re-displaying header in index
   def rebase
-    permitted = params.require(:unit).permit(:base_id)
+    unit_params = params.expect(unit: :base_id)
-    permitted.merge!(multiplier: 1) if permitted[:base_id].blank? && @unit.multiplier != 1
+    unit_params.merge!(multiplier: 1.0) if unit_params[:base_id].blank?
 
     @previous_base = @unit.base
-    @unit.update!(permitted)
+    @unit.update!(unit_params)
 
     @before = @unit.successive
     if @unit.multiplier_previously_changed?
@@ -59,10 +59,6 @@ class UnitsController < ApplicationController
 
   private
 
-  def unit_params
-    params.require(:unit).permit(Unit::ATTRIBUTES)
-  end
-
   def find_unit
     @unit = current_user.units.find_by!(id: params[:id])
   end

app/controllers/user/profiles_controller.rb

@@ -1,24 +1,11 @@
 class User::ProfilesController < Devise::RegistrationsController
   def destroy
-    if current_user.sole_admin?
+    # TODO: Disallow/disable deletion for last admin account; update :edit view
-      redirect_back fallback_location: edit_user_registration_path,
-        alert: t(".sole_admin")
-      return
-    end
     super
   end
 
   protected
 
-  def build_resource(hash = {})
-    super
-    # Skip the email confirmation step when the admin has enabled this option
-    # via the web setup wizard (stored as the "skip_email_confirmation" Setting).
-    # The account becomes active immediately so the user can sign in right after
-    # registering.
-    resource.skip_confirmation! if Setting.get("skip_email_confirmation") == "true"
-  end
-
   def update_resource(resource, params)
     # Based on update_with_password()
     if params[:password].blank?

app/helpers/application_helper.rb

@@ -102,13 +102,21 @@ module ApplicationHelper
 
     def number_field(method, options = {})
       attr_type = object.type_for_attribute(method)
-      if attr_type.type == :decimal
+      case attr_type.type
+      when :float, :double
         options[:value] = object.public_send(method)&.to_scientific
-        options[:step] ||= BigDecimal(10).power(-attr_type.scale)
+        options[:step] ||= :any
-        options[:max] ||= BigDecimal(10).power(attr_type.precision - attr_type.scale) -
+        options[:min] ||= Float::MIN_15
-          options[:step]
+        options[:max] ||= Float::MAX_15
-        options[:min] = options[:min] == :step ? options[:step] : options[:min]
+        # Longest possible number (written not using exponent):
-        options[:min] ||= -options[:max]
+        #   sign (1), leading 0 (1), dot (1), exponent 0s (307), digits (15).
+        # This is only upper bound, which cannot guarantee the number won't fall
+        # out of range.
+        # TODO: add `[pattern]` to limit precision and (possibly) replace `[maxlength]`?
+        # NOTE: `[pattern]` is unavailable on `input[type=number]` and `[min]/[max]` is
+        # unavailable on `input[type=text]`.
+        options[:maxlength] ||= 3 + Float::MIN_10_EXP + Float::DIG
+        options[:size] ||= 6
       end
       super
     end
@@ -148,7 +156,8 @@ module ApplicationHelper
   end
 
   def tabular_form_with(**options, &block)
-    extra_options = {builder: TabularFormBuilder, html: {autocomplete: 'off'}}
+    extra_options = {builder: TabularFormBuilder, class: 'tabular-form',
+                     html: {autocomplete: 'off'}}
     form_with(**merge_attributes(options, extra_options), &block)
   end
 
@@ -203,9 +212,7 @@ module ApplicationHelper
 
   def image_link_to_unless_current(name, image = nil, options = nil, html_options = {})
     name, html_options = link_or_button_options(:link, name, image, html_options)
-    # NOTE: Starting from Rails 8.1.0, below condition can be replaced with:
+    if current_page?(options, method: [:get, :post])
-    #   current_page?(options, method: [:get, :post])
-    if request.path == url_for(options)
       html_options = html_options.deep_merge DISABLED_ATTRIBUTES
     end
     link_to name, options, html_options

app/helpers/quantities_helper.rb

@@ -1,9 +1,9 @@
 module QuantitiesHelper
-  def quantities_check_boxes
+  def quantities_check_boxes(quantities)
     # Closing <details> on focusout event depends on relatedTarget for internal
     # actions being non-null. To ensure this, all top-layer elements of
     # ::details-content must accept focus, e.g. <label> needs tabindex="-1" */
-    collection_check_boxes(nil, :quantity, @quantities, :id, :to_s_with_depth,
+    collection_check_boxes(nil, :quantity, quantities, :id, :to_s_with_depth,
                            include_hidden: false) do |b|
       content_tag :li, b.label(tabindex: -1) { b.check_box + b.text }
     end

app/models/measurement.rb

@@ -1,17 +1,3 @@
 class Measurement
   include ActiveModel::Model
-
-  attr_accessor :readouts, :created_at
-
-  def id
-    created_at.to_i
-  end
-
-  def to_param
-    id.to_s
-  end
-
-  def persisted?
-    true
-  end
 end

app/models/note.rb

@@ -0,0 +1,3 @@
+class Note < ApplicationRecord
+  ATTRIBUTES = [:text]
+end

app/models/quantity.rb

@@ -6,6 +6,7 @@ class Quantity < ApplicationRecord
   belongs_to :parent, optional: true, class_name: "Quantity"
   has_many :subquantities, ->{ order(:name) }, class_name: "Quantity",
     inverse_of: :parent, dependent: :restrict_with_error
+  has_many :readouts, dependent: :restrict_with_error
 
   validate if: ->{ parent.present? } do
     errors.add(:parent, :user_mismatch) unless user_id == parent.user_id
@@ -15,8 +16,8 @@ class Quantity < ApplicationRecord
     errors.add(:parent, :descendant_reference) if ancestor_of?(parent)
   end
   validates :name, presence: true, uniqueness: {scope: [:user_id, :parent_id]},
-    length: {maximum: type_for_attribute(:name).limit || Float::INFINITY}
+    length: {maximum: type_for_attribute(:name).limit}
-  validates :description, length: {maximum: type_for_attribute(:description).limit || Float::INFINITY}
+  validates :description, length: {maximum: type_for_attribute(:description).limit}
 
   # Update :depths of progenies after parent change
   before_save if: :parent_changed? do
@@ -61,26 +62,18 @@ class Quantity < ApplicationRecord
 
   # Return: ordered [sub]hierarchy
   scope :ordered, ->(root: nil, include_root: true) {
-    if connection.adapter_name =~ /mysql/i
+    numbered = Arel::Table.new('numbered')
-      numbered = Arel::Table.new('numbered')
+
-      self.model.with(numbered: numbered(:parent_id, :name)).with_recursive(arel_table.name => [
+    self.model.with(numbered: numbered(:parent_id, :name)).with_recursive(arel_table.name => [
-        numbered.project(
+      numbered.project(
-          numbered[Arel.star],
+        numbered[Arel.star],
-          numbered.cast(numbered[:child_number], 'BINARY').as('path')
+        numbered.cast(numbered[:child_number], 'BINARY').as('path')
-        ).where(numbered[root && include_root ? :id : :parent_id].eq(root)),
+      ).where(numbered[root && include_root ? :id : :parent_id].eq(root)),
-        numbered.project(
+      numbered.project(
-          numbered[Arel.star],
+        numbered[Arel.star],
-          arel_table[:path].concat(numbered[:child_number])
+        arel_table[:path].concat(numbered[:child_number])
-        ).join(arel_table).on(numbered[:parent_id].eq(arel_table[:id]))
+      ).join(arel_table).on(numbered[:parent_id].eq(arel_table[:id]))
-      ]).order(arel_table[:path])
+    ]).order(arel_table[:path])
-    elsif root.nil?
-      # SQLite: pathname column already stores the full hierarchical path
-      order(:pathname)
-    else
-      root_pathname = unscoped.where(id: root).pick(:pathname)
-      scope = order(:pathname).where("pathname LIKE ?", "#{root_pathname}#{PATHNAME_DELIMITER}%")
-      include_root ? scope.or(where(id: root)) : scope
-    end
   }
 
   # TODO: extract named functions to custom Arel extension

app/models/readout.rb

@@ -4,4 +4,6 @@ class Readout < ApplicationRecord
   belongs_to :user
   belongs_to :quantity
   belongs_to :unit
+
+  # TODO: validate quantity.user_id == unit.user_id != NULL
 end

app/models/setting.rb

@@ -1,20 +0,0 @@
-# Key-value store for runtime application settings that are configured through
-# the web setup wizard (or updated by an administrator) rather than hard-coded
-# in application.rb.
-#
-# Known keys:
-#   skip_email_confirmation  – "true"/"false", mirrors the homonymous option
-#                              that was previously in application.rb.
-class Setting < ApplicationRecord
-  validates :key, presence: true, uniqueness: true
-
-  # Return the string value stored for +key+, or +default+ when absent.
-  def self.get(key, default: nil)
-    find_by(key: key)&.value || default
-  end
-
-  # Persist +value+ for +key+, creating the record if it does not yet exist.
-  def self.set(key, value)
-    find_or_initialize_by(key: key).update!(value: value.to_s)
-  end
-end

app/models/unit.rb

@@ -1,5 +1,5 @@
 class Unit < ApplicationRecord
-  ATTRIBUTES = [:symbol, :description, :multiplier, :base_id]
+  ATTRIBUTES = {unit: [:symbol, :description, :multiplier, :base_id]}
 
   belongs_to :user, optional: true
   belongs_to :base, optional: true, class_name: "Unit"
@@ -12,10 +12,10 @@ class Unit < ApplicationRecord
     errors.add(:base, :multilevel_nesting) if base.base_id?
   end
   validates :symbol, presence: true, uniqueness: {scope: :user_id},
-    length: {maximum: type_for_attribute(:symbol).limit || Float::INFINITY}
+    length: {maximum: type_for_attribute(:symbol).limit}
-  validates :description, length: {maximum: type_for_attribute(:description).limit || Float::INFINITY}
+  validates :description, length: {maximum: type_for_attribute(:description).limit}
-  validates :multiplier, numericality: {equal_to: 1}, unless: :base
+  validates :multiplier, numericality: {equal_to: 1.0}, unless: :base
-  validates :multiplier, numericality: {greater_than: 0, precision: true, scale: true}, if: :base
+  validates :multiplier, numericality: {greater_than: 0.0}, if: :base
 
   scope :defaults, ->{ where(user: nil) }
   scope :defaults_diff, ->{
@@ -26,8 +26,10 @@ class Unit < ApplicationRecord
     other_bases_units = arel_table.alias('other_bases_units')
     sub_units = arel_table.alias('sub_units')
 
+    # TODO: move inner 'with' CTE to outer 'with recursive' - it can have multiple
+    # CTEs, even non recursive ones.
     Unit.with_recursive(actionable_units: [
-      self.or(Unit.defaults).left_joins(:base)
+      Unit.with(units: self.or(Unit.defaults)).left_joins(:base)
         .where.not(
           # Exclude Units that are/have default counterpart
           Arel::SelectManager.new.project(1).from(other_units)
@@ -63,14 +65,8 @@ class Unit < ApplicationRecord
         ),
       # Fill base Units to display proper hierarchy. Duplicates will be removed
       # by final group() - can't be deduplicated with UNION due to 'portable' field.
-      # Use ActiveRecord::Relation (not a raw SelectManager) so the SQLite Arel
+      arel_table.join(actionable_units).on(actionable_units[:base_id].eq(arel_table[:id]))
-      # visitor does not wrap it in parentheses inside the UNION ALL CTE body.
+        .project(arel_table[Arel.star], Arel::Nodes.build_quoted(nil).as('portable'))
-      Unit.joins(
-        arel_table.create_join(
-          actionable_units,
-          arel_table.create_on(actionable_units[:base_id].eq(arel_table[:id]))
-        )
-      ).select(arel_table[Arel.star], Arel::Nodes.build_quoted(nil).as('portable'))
     ]).select(units: [:base_id, :symbol])
       .select(
         units[:id].minimum.as('id'), # can be ANY_VALUE()
@@ -78,19 +74,17 @@ class Unit < ApplicationRecord
         Arel::Nodes.build_quoted(1).as('multiplier'), # disregard multiplier when sorting
         units[:portable].minimum.as('portable')
       )
-      .from(units).group(units[:base_id], units[:symbol])
+      .from(units).group(:base_id, :symbol)
   }
   scope :ordered, ->{
-    left_outer_joins(:base).order(ordering)
+    left_outer_joins(:base).order([
+      arel_table.coalesce(Arel::Table.new(:bases_units)[:symbol], arel_table[:symbol]),
+      arel_table[:base_id].not_eq(nil),
+      arel_table[:multiplier],
+      arel_table[:symbol]
+    ])
   }
 
-  def self.ordering
-    [arel_table.coalesce(Arel::Table.new(:bases_units)[:symbol], arel_table[:symbol]),
-     arel_table[:base_id].not_eq(nil),
-     arel_table[:multiplier],
-     arel_table[:symbol]]
-  end
-
   before_destroy do
     # TODO: disallow destruction if any object depends on this unit
     nil
@@ -108,21 +102,21 @@ class Unit < ApplicationRecord
     user_id.nil?
   end
 
-  # Should only by invoked on Units returned from #defaults_diff which are #portable
+  # Should only by invoked on Units returned from #defaults_diff which are #portable.
   def port!(recipient)
     recipient_base = base && Unit.find_by!(symbol: base.symbol, user: recipient)
-    params = slice(ATTRIBUTES - [:symbol, :base_id])
+    params = slice(ATTRIBUTES[:unit] - [:symbol, :base_id])
     Unit.find_or_initialize_by(user: recipient, symbol: symbol)
       .update!(base: recipient_base, **params)
   end
 
   def successive
     units = Unit.arel_table
-    lead = Arel::Nodes::NamedFunction.new('LAG', [units[:id]])
+    Unit.with(units_with_lag: user.units.left_outer_joins(:base).select(
-    window = Arel::Nodes::Window.new.order(*Unit.ordering)
+      units[Arel.star],
-    lag_id = lead.over(window).as('lag_id')
+      Arel::Nodes::NamedFunction.new('LAG', [units[:id]])
-    Unit.with(
+        .over(Arel::Nodes::Window.new.order(Unit.ordered.order_values)).as('lag_id')
-      units: user.units.left_outer_joins(:base).select(units[Arel.star], lag_id)
+    )).from(Arel::Table.new(:units_with_lag).as(:units))
-    ).where(units[:lag_id].eq(id)).first
+      .where(units[:lag_id].eq(id)).take
   end
 end

app/models/user.rb

@@ -29,11 +29,4 @@ class User < ApplicationRecord
   def at_least(status)
     User.statuses[self.status] >= User.statuses[status]
   end
-
-  # Returns true when this user is the only admin account in the system.
-  # Used to block actions that would leave the application without an admin
-  # (account deletion, status demotion).
-  def sole_admin?
-    admin? && !User.admin.where.not(id: id).exists?
-  end
 end

app/views/default/units/_unit.html.erb

@@ -5,7 +5,7 @@
   </td>
 
   <% if current_user.at_least(:active) %>
-    <td class="actions">
+    <td class="flex">
       <% unless unit.portable.nil? %>
         <% if unit.default? %>
           <%= image_button_to_if unit.portable?, t('.import'), 'download-outline',

app/views/default/units/index.html.erb

@@ -8,7 +8,7 @@
     class: 'tools-area' %>
 </div>
 
-<table class="main-area items">
+<table class="main-area items-table">
   <thead>
     <tr>
       <th><%= Unit.human_attribute_name(:symbol) %></th>

app/views/layouts/application.html.erb

@@ -23,10 +23,10 @@
   </head>
 
   <body>
-    <header class="hflex">
+    <header class="flex">
       <%= image_link_to t(".source_code"), "code-braces", source_code_url %>
       <%= image_link_to t(".issue_tracker"), "bug-outline", issue_tracker_url,
-            class: "extendedright" %>
+        class: "rextend" %>
       <% if user_signed_in? %>
         <%= image_link_to_unless_current(current_user, "account-wrench-outline",
           edit_user_registration_path) %>

app/views/measurements/_form.html.erb

@@ -1,25 +1,39 @@
-<%= tabular_form_with model: Measurement.new do |form| %>
+<%= tabular_form_with model: Measurement.new, id: :measurement_form,
-  <fieldset>
+  class: 'topside-area flex vertical center',
-    <table class="items centered">
+  html: {onkeydown: 'formProcessKey(event)'} do |form| %>
-      <tbody id="readouts">
+
-        <tr id="readouts_form">
+  <table class="items-table center">
-          <td colspan="4">
+    <tbody id="readouts">
-            <%= collection_select :quantity, :id, @quantities, :id, :to_s_with_depth,
+      <%= tabular_fields_for @measurement do |form| %>
-              {prompt: t('.select_quantity'), disabled: '', selected: ''},
+        <tr class="italic">
-              {name: :id, class: 'quantity vexpand',
+          <td class="hexpand hmin50"><%= t '.taken_at_html' %></td>
-               onchange: "this.form.requestSubmit(new_readout_submit);"} %>
+          <td colspan="3" class="ralign">
-            <%= form.submit id: :new_readout_submit, name: nil, value: nil,
+            <%= form.datetime_field :taken_at, required: true %>
-              formaction: new_readout_path, formmethod: :get, formnovalidate: true,
-              hidden: true, data: {turbo_stream: true} %>
           </td>
         </tr>
-      </tbody>
+      <% end %>
-    </table>
+    </tbody>
-  </fieldset>
+  </table>
-  <div class="hflex centered">
+
-    <%= form.button -%>
+  <%# TODO: right-click selection; unnecessary with hierarchical tags? %>
+  <details id="quantity_select" class="center hexpand" open
+           onkeydown="detailsProcessKey(event)">
+    <summary autofocus>
+      <!-- TODO: Set content with CSS when span empty to avoid duplication -->
+      <span data-prompt="<%= t('.select_quantity') %>">
+        <%= t('.select_quantity') %>
+      </span>
+      <%= image_button_tag t(:apply), "update", name: nil, disabled: true,
+        formaction: new_readout_path, formmethod: :get, formnovalidate: true,
+        data: {turbo_stream: true} %>
+    </summary>
+    <ul><%= quantities_check_boxes(@quantities) %></ul>
+  </details>
+
+  <div class="flex reverse">
+    <%= form.button id: :create_measurement_button, disabled: true -%>
     <%= image_link_to t(:cancel), "close-outline", measurements_path, name: :cancel,
-      class: 'dangerous', onclick: render_turbo_stream('form_close') %>
+      class: 'auxiliary dangerous', onclick: render_turbo_stream('form_close') %>
   </div>
 <% end %>
 

app/views/measurements/_form_close.html.erb

@@ -1,4 +1,3 @@
-<%= turbo_stream.update :measurement_form %>
 <%= turbo_stream.update :flashes %>
 <%= turbo_stream.remove :measurement_form %>
 <%= turbo_stream.show :no_items -%>

app/views/measurements/_measurement.html.erb

@@ -1,14 +0,0 @@
-<%= tag.tr id: dom_id(measurement) do %>
-  <td><%= l measurement.created_at, format: :short %></td>
-  <td>
-    <% measurement.readouts.each do |readout| %>
-      <span><%= readout.quantity.name %>: <%= readout.value %> <%= readout.unit %></span>
-    <% end %>
-  </td>
-  <% if current_user.at_least(:active) %>
-    <td class="actions">
-      <%= image_button_to t('.destroy'), 'delete-outline', measurement_path(measurement),
-        method: :delete %>
-    </td>
-  <% end %>
-<% end %>

app/views/measurements/create.turbo_stream.erb

@@ -1,5 +0,0 @@
-<%= turbo_stream.update :flashes %>
-<%= turbo_stream.remove :measurement_form %>
-<%= turbo_stream.remove :no_items %>
-<%= turbo_stream.enable :new_measurement_link %>
-<%= turbo_stream.prepend :measurements, @measurement %>

app/views/measurements/destroy.turbo_stream.erb

@@ -1,3 +0,0 @@
-<%= turbo_stream.update :flashes %>
-<%= turbo_stream.remove @measurement %>
-<%= turbo_stream.append(:measurements, render_no_items) if @measurements_empty %>

app/views/measurements/index.html.erb

@@ -1,5 +1,5 @@
 <%# TODO: show hint when no quantities/units defined %>
-<div class="rightside buttongrid">
+<div class="rightside-area buttongrid">
   <% if current_user.at_least(:active) %>
     <%= image_link_to t('.new_measurement'), 'plus-outline', new_measurement_path,
       id: :new_measurement_link, onclick: 'this.blur();',
@@ -7,9 +7,7 @@
   <% end %>
 </div>
 
-<%= tag.div class: 'topside', id: :measurement_form %>
+<table class="main-area">
-
-<table class="main">
   <tbody id="measurements">
     <%= render(@measurements) || render_no_items %>
   </tbody>

app/views/measurements/new.turbo_stream.erb

@@ -1,4 +1,5 @@
 <%= turbo_stream.disable :new_measurement_link -%>
-<%= turbo_stream.update :measurement_form do %>
+<%= turbo_stream.hide :no_items -%>
+<%= turbo_stream.append_all 'body' do %>
   <%= render partial: 'form' %>
 <% end %>

app/views/quantities/_form.html.erb

@@ -9,7 +9,7 @@
       <%= form.text_area :description, cols: 30, rows: 1, escape: false %>
     </td>
 
-    <td class="actions">
+    <td class="flex">
       <%= form.button %>
       <%= image_link_to t(:cancel), "close-outline", quantities_path, class: 'dangerous',
         name: :cancel, onclick: render_turbo_stream('form_close', {row: row}) %>

app/views/quantities/_quantity.html.erb

@@ -5,14 +5,14 @@
            data: {drag_path: reparent_quantity_path(quantity), drop_id: dom_id(quantity),
                   drop_id_param: "quantity[parent_id]"} do %>
 
-  <td class="link" style="--depth:<%= quantity.depth %>">
+  <td style="--depth:<%= quantity.depth %>">
-    <%= link_to quantity, edit_quantity_path(quantity), onclick: 'this.blur();',
+    <%= link_to quantity, edit_quantity_path(quantity), class: 'link',
-      data: {turbo_stream: true} %>
+      onclick: 'this.blur();', data: {turbo_stream: true} %>
   </td>
   <td><%= quantity.description %></td>
 
   <% if current_user.at_least(:active) %>
-    <td class="actions">
+    <td class="flex">
       <%= image_link_to t('.new_subquantity'), 'plus-outline', new_quantity_path(quantity),
         id: dom_id(quantity, :new, :link), onclick: 'this.blur();', data: {turbo_stream: true} %>
 

app/views/quantities/index.html.erb

@@ -8,13 +8,14 @@
     class: 'tools-area' %>
 </div>
 
+<%# TODO: remove? form can be inserted directly, e.g. at the end of index %>
 <%= tag.div class: 'main-area', id: :quantity_form %>
 
-<table class="main-area items">
+<table class="main-area items-table">
   <thead>
     <tr>
       <th><%= Quantity.human_attribute_name(:name) %></th>
-      <th><%= Quantity.human_attribute_name(:description) %></th>
+      <th class="hexpand"><%= Quantity.human_attribute_name(:description) %></th>
       <% if current_user.at_least(:active) %>
         <th><%= t :actions %></th>
         <th></th>

app/views/readouts/_form.html.erb

@@ -1,20 +1,22 @@
 <%# TODO: add readout reordering by dragging %>
 <%= tabular_fields_for 'readouts[]', readout do |form| %>
-  <%- tag.tr id: dom_id(readout.quantity, :new, :readout),
+  <%- tag.tr id: dom_id(readout.quantity, :new, :readout) do %>
-             onkeydown: 'processKey(event)' do %>
     <td>
+      <%# TODO: add grayed readout index (in separate column?) %>
       <%= readout.quantity.relative_pathname(@superquantity) %>
-    </td>
-    <td>
-      <%= form.number_field :value, required: true, autofocus: true, size: 10 %>
-    </td>
-    <td>
       <%= form.hidden_field :quantity_id %>
-      <%= form.collection_select :unit_id, @user_units, :id,
-        ->(u){ sanitize('&emsp;' * (u.base_id ? 1 : 0) + u.symbol) } %>
     </td>
-    <td class="actions">
+    <td>
-      <%= image_button_tag '', 'delete-outline', class: 'dangerous', name: :discard,
+      <%= form.number_field :value, required: true, autofocus: readout_counter == 0 %>
+    </td>
+    <td>
+      <%= form.collection_select :unit_id, @user_units, :id,
+        ->(u){ sanitize('&emsp;' * (u.base_id ? 1 : 0) + u.symbol) },
+        {prompt: '', disabled: '', selected: ''}, required: true %>
+    </td>
+    <td class="flex">
+      <%# TODO: change to _link_ after giving up displaying relative paths %>
+      <%= image_button_tag '', 'delete-outline', class: 'dangerous', name: nil,
         formaction: discard_readouts_path(readout.quantity),
         formmethod: :get, formnovalidate: true, data: {turbo_stream: true} %>
     </td>

app/views/readouts/discard.turbo_stream.erb

@@ -1,4 +1,4 @@
+<%= turbo_stream.disable :create_measurement_button if @prev_quantities.one? %>
 <%= turbo_stream.remove dom_id(@quantity, :new, :readout) %>
-<%= turbo_stream.disable_all 'button[name="discard"]' if @prev_quantities.one? %>
-<%= turbo_stream.enable_all "select.quantity option[value='#{@quantity.id}']" %>
 <%= render partial: 'form_repath' %>
+<%= turbo_stream.unselect dom_id(@quantity) %>

app/views/readouts/new.turbo_stream.erb

@@ -1,9 +1,8 @@
-<%= render partial: 'form_repath' %>
-<%# is .one? proper condition? can @readouts be empty? %>
-<%= turbo_stream.enable_all 'button[name="discard"]' if @prev_quantities.one? %>
 <% @readouts.each do |r| %>
-  <%= turbo_stream.disable_all "select.quantity option[value='#{r.quantity_id}']" %>
+  <%= turbo_stream.disable dom_id(r.quantity) %>
 <% end %>
-<%= turbo_stream.before :readouts_form do %>
+<%= render partial: 'form_repath' %>
+<%= turbo_stream.append :readouts do %>
   <%= render partial: 'form', collection: @readouts, as: :readout %>
 <% end %>
+<%= turbo_stream.enable :create_measurement_button if @prev_quantities.empty? %>

app/views/setup/new.html.erb

@@ -1,39 +0,0 @@
-<%= form_with url: setup_path, method: :post, class: "labeled-form main-area" do %>
-
-  <h3 style="grid-column: 1 / -1; text-align: left; margin: 0;">
-    <%= t(".admin_account") %>
-  </h3>
-
-  <label for="admin_email"><%= t(".admin_email") %></label>
-  <%= email_field_tag :admin_email, params[:admin_email],
-        id: "admin_email", required: true, size: 30, autofocus: true,
-        autocomplete: "email" %>
-
-  <label for="admin_password"><%= t(".admin_password") %></label>
-  <%= password_field_tag :admin_password, nil,
-        id: "admin_password", required: true, size: 30,
-        autocomplete: "new-password" %>
-
-  <label for="admin_password_confirmation"><%= t(".admin_password_confirmation") %></label>
-  <%= password_field_tag :admin_password_confirmation, nil,
-        id: "admin_password_confirmation", required: true, size: 30,
-        autocomplete: "off" %>
-
-  <h3 style="grid-column: 1 / -1; text-align: left; margin: 0.5em 0 0 0;">
-    <%= t(".options") %>
-  </h3>
-
-  <label for="skip_email_confirmation" style="grid-column: 1 / 3; text-align: left;">
-    <%= check_box_tag :skip_email_confirmation, "1",
-          params[:skip_email_confirmation] == "1",
-          id: "skip_email_confirmation" %>
-    <%= t(".skip_email_confirmation") %>
-  </label>
-
-  <label for="seed_units" style="grid-column: 1 / 3; text-align: left;">
-    <%= check_box_tag :seed_units, "1", true, id: "seed_units" %>
-    <%= t(".seed_units") %>
-  </label>
-
-  <%= submit_tag t(".submit") %>
-<% end %>

app/views/units/_form.html.erb

@@ -8,11 +8,11 @@
     <td>
       <%= form.text_area :description, cols: 30, rows: 1, escape: false %>
     </td>
-    <td class="number">
+    <td>
-      <%= form.number_field :multiplier, required: true, size: 10, min: :step if @unit.base_id? %>
+      <%= form.number_field :multiplier, required: true if @unit.base_id? %>
     </td>
 
-    <td class="actions">
+    <td class="flex">
       <%= form.button %>
       <%= image_link_to t(:cancel), "close-outline", units_path, class: 'dangerous',
         name: :cancel, onclick: render_turbo_stream('form_close', {row: row}) %>

app/views/units/_unit.html.erb

@@ -6,14 +6,15 @@
                   drop_id: dom_id(unit.base || unit),
                   drop_id_param: "unit[base_id]"} do %>
 
-  <td class="link" style="--depth:<%= unit.base_id? ? 1 : 0 %>">
+  <td style="--depth:<%= unit.base_id? ? 1 : 0 %>">
-    <%= link_to unit, edit_unit_path(unit), onclick: 'this.blur();', data: {turbo_stream: true} %>
+    <%= link_to unit, edit_unit_path(unit), class: 'link', onclick: 'this.blur();',
+      data: {turbo_stream: true} %>
   </td>
   <td><%= unit.description %></td>
-  <td class="number"><%= unit.multiplier.to_html %></td>
+  <td class="ralign"><%= unit.multiplier.to_html if unit.base_id? %></td>
 
   <% if current_user.at_least(:active) %>
-    <td class="actions">
+    <td class="flex">
       <% unless unit.base_id? %>
         <%= image_link_to t('.new_subunit'), 'plus-outline', new_unit_path(unit),
           id: dom_id(unit, :new, :link), onclick: 'this.blur();', data: {turbo_stream: true} %>

app/views/units/index.html.erb

@@ -7,13 +7,14 @@
     class: 'tools-area' %>
 </div>
 
+<%# TODO: remove? form can be inserted directly, e.g. at the end of index %>
 <%= tag.div id: :unit_form %>
 
-<table class="main-area items">
+<table class="main-area items-table">
   <thead>
     <tr>
       <th><%= Unit.human_attribute_name(:symbol) %></th>
-      <th><%= Unit.human_attribute_name(:description) %></th>
+      <th class="hexpand"><%= Unit.human_attribute_name(:description) %></th>
       <th><%= Unit.human_attribute_name(:multiplier) %></th>
       <% if current_user.at_least(:active) %>
         <th><%= t :actions %></th>

app/views/units/rebase.turbo_stream.erb

@@ -1,4 +1,4 @@
 <%= turbo_stream.remove @unit %>
 <%= turbo_stream.replace @previous_base if @previous_base %>
-<%= turbo_stream.replace @unit.base if @unit.base_id? && (@previous_base.id != @unit.base_id) %>
+<%= turbo_stream.replace @unit.base if @unit.base_id? && (@previous_base&.id != @unit.base_id) %>
 <%= @before ? turbo_stream.before(@before, @unit) : turbo_stream.append(:units, @unit) %>

app/views/users/index.html.erb

@@ -1,4 +1,4 @@
-<table class="main-area items" id="users">
+<table class="main-area items-table" id="users">
   <thead>
     <tr>
       <th><%= User.human_attribute_name(:email) %></th>
@@ -11,7 +11,7 @@
   <tbody>
     <% @users.each do |user| %>
       <tr>
-        <td class="link"><%= link_to user, user_path(user) %></td>
+        <td><%= link_to user, user_path(user), class: 'link' %></td>
         <td>
           <% if user == current_user %>
             <%= user.status %>
@@ -22,11 +22,11 @@
             <% end %>
           <% end %>
         </td>
-        <td class="svg">
+        <td>
           <%= svg_tag 'pictograms/checkbox-marked-outline' if user.confirmed_at.present? %>
         </td>
         <td><%= l user.created_at, format: :without_tz %></td>
-        <td class="actions">
+        <td class="flex">
           <% if allow_disguise?(user) %>
             <%= image_link_to t('.disguise'), 'incognito', disguise_user_path(user) %>
           <% end %>

app/views/users/profiles/edit.html.erb

@@ -4,8 +4,9 @@
 <% end %>
 
 <div class="rightside-area buttongrid">
-  <%= image_button_to_if !current_user.sole_admin?, t('.delete'), 'account-remove-outline',
+  <%#= TODO: Disallow/disable deletion for last admin account, image_button_to_if %>
-    user_registration_path, form_class: 'tools-area', method: :delete, data: {turbo: false},
+  <%= image_button_to t('.delete'), 'account-remove-outline', user_registration_path,
+    form_class: 'tools-area', method: :delete, data: {turbo: false},
     onclick: {confirm: t('.confirm_delete')} %>
 </div>
 

app/views/users/profiles/new.html.erb

@@ -10,7 +10,6 @@
 
   <%= f.submit t(:register), data: {turbo: false} %>
 
-  <%# TODO: fix button text color after change link -> button %>
   <%= image_button_tag t(:resend_confirmation), 'email-sync-outline',
     class: 'auxiliary', formaction: user_confirmation_path, formnovalidate: true,
     data: {validate: f.field_id(:email)} %>

app/views/users/unlocks/new.html.erb

@@ -8,7 +8,7 @@
     <%= f.email_field :email, autofocus: true, autocomplete: "email" %>
   </div>
 
-  <div class="actions">
+  <div class="flex">
     <%= f.submit "Resend unlock instructions" %>
   </div>
 <% end %>

bin/ci

@@ -0,0 +1,6 @@
+#!/usr/bin/env ruby
+require_relative "../config/boot"
+require "active_support/continuous_integration"
+
+CI = ActiveSupport::ContinuousIntegration
+require_relative "../config/ci.rb"

bin/dev

@@ -0,0 +1,2 @@
+#!/usr/bin/env ruby
+exec "./bin/rails", "server", *ARGV

bin/setup

@@ -1,11 +1,10 @@
 #!/usr/bin/env ruby
 require "fileutils"
 
-# path to your application root.
 APP_ROOT = File.expand_path("..", __dir__)
 
 def system!(*args)
-  system(*args) || abort("\n== Command #{args} failed ==")
+  system(*args, exception: true)
 end
 
 FileUtils.chdir APP_ROOT do
@@ -14,7 +13,6 @@ FileUtils.chdir APP_ROOT do
   # Add necessary setup steps to this file.
 
   puts "== Installing dependencies =="
-  system! "gem install bundler --conservative"
   system("bundle check") || system!("bundle install")
 
   # puts "\n== Copying sample files =="
@@ -24,10 +22,14 @@ FileUtils.chdir APP_ROOT do
 
   puts "\n== Preparing database =="
   system! "bin/rails db:prepare"
+  system! "bin/rails db:reset" if ARGV.include?("--reset")
 
   puts "\n== Removing old logs and tempfiles =="
   system! "bin/rails log:clear tmp:clear"
 
-  puts "\n== Restarting application server =="
+  unless ARGV.include?("--skip-server")
-  system! "bin/rails restart"
+    puts "\n== Starting development server =="
+    STDOUT.flush # flush the output before exec(2) so that it displays
+    exec "bin/dev"
+  end
 end

config/application.rb.dist

@@ -18,14 +18,17 @@ require "rails/test_unit/railtie"
 # you've limited to :test, :development, or :production.
 Bundler.require(*Rails.groups)
 
+require_relative '../lib/default_settings_strategy'
+
 module FixinMe
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
-    config.load_defaults 7.0
+    config.load_defaults 8.1
 
-    # Autoload lib/, required e.g. for core library extensions.
+    # Please, add to the `ignore` list any other `lib` subdirectories that do
-    # https://guides.rubyonrails.org/autoloading_and_reloading_constants.html#config-autoload-lib-ignore.
+    # not contain `.rb` files, or that should not be reloaded or eager loaded.
-    config.autoload_lib(ignore: %w(assets tasks))
+    # Common ones are `templates`, `generators`, or `middleware`, for example.
+    config.autoload_lib(ignore: %w[assets tasks])
 
     # Configuration for the application, engines, and railties goes here.
     #
@@ -38,25 +41,24 @@ module FixinMe
     config.action_dispatch.rescue_responses['ApplicationController::AccessForbidden'] = :forbidden
     config.action_dispatch.rescue_responses['ApplicationController::ParameterInvalid'] = :unprocessable_entity
 
+    # Set default migrations parameters.
+    config.active_record.migration_strategy = DefaultSettingsStrategy
+
     # SETUP: Below settings need to be updated on a per-installation basis.
     #
-    # URL to use in sent e-mails.
+    # Set host to be used by links generated in mailer templates.
-    config.action_mailer.default_url_options = {host: 'localhost', :protocol => 'https'}
+    config.action_mailer.default_url_options = {host: 'localhost', protocol: 'https'}
     # https://guides.rubyonrails.org/configuring.html#config-action-mailer-delivery-method
     config.action_mailer.delivery_method = :sendmail
 
     # List of hosts this app is available at.
     # https://guides.rubyonrails.org/configuring.html#actiondispatch-hostauthorization
-    config.hosts += ['localhost', 'example.com', IPAddr.new('1.2.3.4/32')]
+    config.hosts |= ['localhost']
 
     # Email address of admin account
     config.admin = 'admin@localhost'
 
     # Sender address of account registration-related messages
     Devise.mailer_sender = 'noreply@localhost'
-
-    # Whether to skip e-mail confirmation for new registrations is configured
-    # through the web setup wizard and stored in the database (Setting model),
-    # so it does not need to be set here.
   end
 end

config/ci.rb

@@ -0,0 +1,20 @@
+# Run using bin/ci
+
+CI.run do
+  step "Setup", "bin/setup --skip-server"
+
+  step "Security: Importmap vulnerability audit", "bin/importmap audit"
+  step "Tests: Rails", "bin/rails test"
+  step "Tests: Seeds", "env RAILS_ENV=test bin/rails db:seed:replant"
+
+  # Optional: Run system tests
+  # step "Tests: System", "bin/rails test:system"
+
+  # Optional: set a green GitHub commit status to unblock PR merge.
+  # Requires the `gh` CLI and `gh extension install basecamp/gh-signoff`.
+  # if success?
+  #   step "Signoff: All systems go. Ready for merge and deploy.", "gh signoff"
+  # else
+  #   failure "Signoff: CI failed. Do not merge or deploy.", "Fix the issues and try again."
+  # end
+end

config/credentials.yml.enc

@@ -1 +1 @@
-OOGMGhfQuV67kqlMecZLcNfgrGS81KPAGmY27GnohtcGSPtiaqL8OZYsVf5IIOaI1K14ZEflln+E2deaIJ5apaq98f+1gJawGbAJeEfLCskJV/03nT8ICpRk+bxT/lzqeCIaUJOLk4708ufC9EpdpJD/jgVSAuI/iNMzzwMbNFvqNmx0Kmgp0mRpHSDGLZZkaP3GW7wdsJEVsNpSPIrkkGL1BvD+nHbmHjuGkn4MMsmm1Yz0M31jkJiDksT0SVeOcxWvOApclxm6VZOAws2l6YKEs/XoE7ye3ssjxdjdwjMzRXV7dwYclNBQGRoERVTozdYiFR4eAGMdlG0RsnUAp+edILH5nvHCIPb3la/dUTOzAQMNY0TqMMVUHGqGuVS/EMCX/w7zrmYN5C+2W8SfugrvTpAL--dUdvsDfbUdVrbmmo--fUwsWUp+DQGPtEF+Zq4ZTw==
+3nm9KZNtyLhPgZBVzOOkN2FXHD0uEMuzgb5Sl1MrAMmi6+iEFSzyTHfZFW2mz18VyNz5DDYvTODZqBDQKK+FQh70uEQkmGqaY5XsTOzUFzk56quaPNtZvFEGux1nX2avSbYQBs3HeyYyWyTAFhez5j8tVb6sZD2xZ8twa9KAB42j86NIHT9w/ZMFqZbGbdBoR1Mrqoy9/IWv2QgxMTpGR6JBpTUwauXm6wS/bTt8SCXF57JSVgvdw/BxFzoA3Xj6N5E89LbMfh54W2ruMhybka5E7zXN9z0v4oXt8GiYZFIODEYZwqzEVaUK1WXS5qb5OrDJFAzs29Uf/gDrIDx71Lot+jejCS+xFfI9454EnHcVH66wKuwF6ylKupJDffM0hQHplcEfVSq5UiDfbPXm46Vr0g1A--2RrmuzCBuHvYpPNA--ugbuRe7ivfDqeUCt6ahciA==

config/database.yml.dist

@@ -24,27 +24,45 @@
 # Read https://guides.rubyonrails.org/configuring.html#configuring-a-database
 # for a full overview on how database connection configuration can be specified.
 default: &default
-  adapter: mysql2
+  pool: <%= ENV.fetch('RAILS_MAX_THREADS', 3) %>
-  encoding: utf8mb4
+
-  collation: utf8mb4_0900_as_ci
+#mysql_default: &mysql_default
-  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
+#  <<: *default
-  username: fixinme
+#  username: fixinme
-  password: Some-password1%
+#  password: Some-password1%
-  socket: /run/mysqld/mysqld.sock
+#  host: 127.0.0.1
+#  encoding: utf8mb4
+#  collation: utf8mb4_0900_as_ci
 
 production:
   <<: *default
-  database: fixinme
+  adapter: sqlite3
+  database: db/production.sqlite3
 
-# Unless you're planning on developing the application, you can skip
+# Unless you're planning on developing the application, you can skip/remove
 # configurations for development and test databases altogether.
 #development:
-#  <<: *default
+#  <<: *mysql_default
+#  adapter: mysql2
 #  database: fixinme_dev
 
-# Warning: The database defined as "test" will be erased and
+# Warning: The database(s) defined as "test" will be erased and
 # re-generated from your development database when you run "rake".
 # Do not set this db to the same as development or production.
 #test:
-#  <<: *default
+#  <<: *mysql_default
+#  adapter: mysql2
 #  database: fixinme_test
+
+# Multiple test databases can be provided. When more than one test db is
+# present, every test task (test, test:models, test:system, etc.) runs against
+# all of them.
+#test:
+#  mysql2:
+#    <<: *mysql_default
+#    adapter: mysql2
+#    database: fixinme_test
+#  sqlite3:
+#    <<: *default
+#    adapter: sqlite3
+#    database: db/test.sqlite3

config/environments/development.rb

@@ -3,10 +3,8 @@ require "active_support/core_ext/integer/time"
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
-  # In the development environment your application's code is reloaded any time
+  # Make code changes take effect immediately without server restart.
-  # it changes. This slows down response time but is perfect for development
+  config.enable_reloading = true
-  # since you don't have to restart the web server when you make code changes.
-  config.cache_classes = false
 
   # Do not eager load code on boot.
   config.eager_load = false
@@ -14,54 +12,52 @@ Rails.application.configure do
   # Show full error reports.
   config.consider_all_requests_local = true
 
-  # Enable server timing
+  # Enable server timing.
   config.server_timing = true
 
-  # Enable/disable caching. By default caching is disabled.
+  # Enable/disable Action Controller caching. By default Action Controller caching is disabled.
-  # Run rails dev:cache to toggle caching.
+  # Run rails dev:cache to toggle Action Controller caching.
   if Rails.root.join("tmp/caching-dev.txt").exist?
     config.action_controller.perform_caching = true
     config.action_controller.enable_fragment_cache_logging = true
-
+    config.public_file_server.headers = { "cache-control" => "public, max-age=#{2.days.to_i}" }
-    config.cache_store = :memory_store
-    config.public_file_server.headers = {
-      "Cache-Control" => "public, max-age=#{2.days.to_i}"
-    }
   else
     config.action_controller.perform_caching = false
-
-    config.cache_store = :null_store
   end
 
+  # Change to :null_store to avoid any caching.
+  config.cache_store = :memory_store
+
   # Don't care if the mailer can't send.
   config.action_mailer.raise_delivery_errors = false
 
+  # Make template changes take effect immediately.
   config.action_mailer.perform_caching = false
 
   # Print deprecation notices to the Rails logger.
   config.active_support.deprecation = :log
 
-  # Raise exceptions for disallowed deprecations.
-  config.active_support.disallowed_deprecation = :raise
-
-  # Tell Active Support which deprecation messages to disallow.
-  config.active_support.disallowed_deprecation_warnings = []
-
   # Raise an error on page load if there are pending migrations.
   config.active_record.migration_error = :page_load
 
   # Highlight code that triggered database queries in logs.
   config.active_record.verbose_query_logs = true
 
-  # Suppress logger output for asset requests.
+  # Append comments with runtime information tags to SQL queries in logs.
-  config.assets.quiet = true
+  config.active_record.query_log_tags_enabled = true
+
+  # Highlight code that enqueued background job in logs.
+  config.active_job.verbose_enqueue_logs = true
+
+  # Highlight code that triggered redirect in logs.
+  config.action_dispatch.verbose_redirect_logs = true
 
   # Raises error for missing translations.
   # config.i18n.raise_on_missing_translations = true
 
   # Annotate rendered view with file names.
-  # config.action_view.annotate_rendered_view_with_filenames = true
+  config.action_view.annotate_rendered_view_with_filenames = true
 
-  # Uncomment if you wish to allow Action Cable access from any origin.
+  # Raise error when a before_action's only/except options reference missing actions.
-  # config.action_cable.disable_request_forgery_protection = true
+  config.action_controller.raise_on_missing_callback_actions = true
 end

config/environments/production.rb

@@ -4,78 +4,83 @@ Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
   # Code is not reloaded between requests.
-  config.cache_classes = true
+  config.enable_reloading = false
 
-  # Eager load code on boot. This eager loads most of Rails and
+  # Eager load code on boot for better performance and memory savings (ignored by Rake tasks).
-  # your application in memory, allowing both threaded web servers
-  # and those relying on copy on write to perform better.
-  # Rake tasks automatically ignore this option for performance.
   config.eager_load = true
 
-  # Full error reports are disabled and caching is turned on.
+  # Full error reports are disabled.
-  config.consider_all_requests_local       = false
+  config.consider_all_requests_local = false
+
+  # Turn on fragment caching in view templates.
   config.action_controller.perform_caching = true
 
-  # Ensures that a master key has been made available in either ENV["RAILS_MASTER_KEY"]
+  # Cache assets for far-future expiry since they are all digest stamped.
-  # or in config/master.key. This key is used to decrypt credentials (and other encrypted files).
+  config.public_file_server.headers = { "cache-control" => "public, max-age=#{1.year.to_i}" }
-  # config.require_master_key = true
-
-  # Disable serving static files from the `/public` folder by default since
-  # Apache or NGINX already handles this.
-  config.public_file_server.enabled = ENV["RAILS_SERVE_STATIC_FILES"].present?
-
-  # Compress CSS using a preprocessor.
-  # config.assets.css_compressor = :sass
-
-  # Do not fallback to assets pipeline if a precompiled asset is missed.
-  config.assets.compile = false
 
   # Enable serving of images, stylesheets, and JavaScripts from an asset server.
   # config.asset_host = "http://assets.example.com"
 
-  # Specifies the header that your server uses for sending files.
+  # Assume all access to the app is happening through a SSL-terminating reverse proxy.
-  # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for Apache
+  config.assume_ssl = true
-  # config.action_dispatch.x_sendfile_header = "X-Accel-Redirect" # for NGINX
 
   # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
-  # config.force_ssl = true
+  config.force_ssl = true
 
-  # Include generic and useful information about system operation, but avoid logging too much
+  # Skip http-to-https redirect for the default health check endpoint.
-  # information to avoid inadvertent exposure of personally identifiable information (PII).
+  # config.ssl_options = { redirect: { exclude: ->(request) { request.path == "/up" } } }
-  config.log_level = :info
 
-  # Prepend all log lines with the following tags.
+  # Log to STDOUT with the current request id as a default log tag.
   config.log_tags = [ :request_id ]
+  config.logger   = ActiveSupport::TaggedLogging.logger(STDOUT)
 
-  # Use a different cache store in production.
+  # Change to "debug" to log everything (including potentially personally-identifiable information!).
+  config.log_level = ENV.fetch("RAILS_LOG_LEVEL", "info")
+
+  # Prevent health checks from clogging up the logs.
+  config.silence_healthcheck_path = "/up"
+
+  # Don't log any deprecations.
+  config.active_support.report_deprecations = false
+
+  # Replace the default in-process memory cache store with a durable alternative.
   # config.cache_store = :mem_cache_store
 
-  config.action_mailer.perform_caching = false
+  # Replace the default in-process and non-durable queuing backend for Active Job.
+  # config.active_job.queue_adapter = :resque
 
   # Ignore bad email addresses and do not raise email delivery errors.
   # Set this to true and configure the email server for immediate delivery to raise delivery errors.
   # config.action_mailer.raise_delivery_errors = false
 
+  # Specify outgoing SMTP server. Remember to add smtp/* credentials via bin/rails credentials:edit.
+  # config.action_mailer.smtp_settings = {
+  #   user_name: Rails.application.credentials.dig(:smtp, :user_name),
+  #   password: Rails.application.credentials.dig(:smtp, :password),
+  #   address: "smtp.example.com",
+  #   port: 587,
+  #   authentication: :plain
+  # }
+
   # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
   # the I18n.default_locale when a translation cannot be found).
   config.i18n.fallbacks = true
 
-  # Don't log any deprecations.
-  config.active_support.report_deprecations = false
-
-  # Use default logging formatter so that PID and timestamp are not suppressed.
-  config.log_formatter = ::Logger::Formatter.new
-
-  # Use a different logger for distributed setups.
-  # require "syslog/logger"
-  # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new "app-name")
-
-  if ENV["RAILS_LOG_TO_STDOUT"].present?
-    logger           = ActiveSupport::Logger.new(STDOUT)
-    logger.formatter = config.log_formatter
-    config.logger    = ActiveSupport::TaggedLogging.new(logger)
-  end
-
   # Do not dump schema after migrations.
   config.active_record.dump_schema_after_migration = false
+
+  # Only use :id for inspections in production.
+  config.active_record.attributes_for_inspect = [ :id ]
+
+  # Enable DNS rebinding protection and other `Host` header attacks.
+  # config.hosts = [
+  #   "example.com",     # Allow requests from example.com
+  #   /.*\.example\.com/ # Allow requests from subdomains like `www.example.com`
+  # ]
+  #
+  # Skip DNS rebinding protection for the default health check endpoint.
+  # config.host_authorization = { exclude: ->(request) { request.path == "/up" } }
+
+  # Protect e-mail addresses from being logged only in production.
+  config.filter_parameters += [:email]
 end

config/environments/test.rb

@@ -1,5 +1,3 @@
-require "active_support/core_ext/integer/time"
-
 # The test environment is used exclusively to run your application's
 # test suite. You never need to work with it otherwise. Remember that
 # your test database is "scratch space" for the test suite and is wiped
@@ -8,57 +6,49 @@ require "active_support/core_ext/integer/time"
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
-  # Turn false under Spring and add config.action_view.cache_template_loading = true.
+  # While tests run files are not watched, reloading is not necessary.
-  config.cache_classes = true
+  config.enable_reloading = false
 
-  # Eager loading loads your whole application. When running a single test locally,
+  # Eager loading loads your entire application. When running a single test locally,
-  # this probably isn't necessary. It's a good idea to do in a continuous integration
+  # this is usually not necessary, and can slow down your test suite. However, it's
-  # system, or in some way before deploying your code.
+  # recommended that you enable it in continuous integration systems to ensure eager
+  # loading is working properly before deploying your code.
   config.eager_load = ENV["CI"].present?
 
-  # Configure public file server for tests with Cache-Control for performance.
+  # Configure public file server for tests with cache-control for performance.
-  config.public_file_server.enabled = true
+  config.public_file_server.headers = { "cache-control" => "public, max-age=3600" }
-  config.public_file_server.headers = {
-    "Cache-Control" => "public, max-age=#{1.hour.to_i}"
-  }
 
-  # Hide full error reports.
+  # Behave as in `production`.
-  config.consider_all_requests_local     = false
+  config.consider_all_requests_local = false
-  # Render exception templates instead of raising exceptions.
-  config.action_dispatch.show_exceptions = :all
 
-  # Disable caching.
-  config.action_controller.perform_caching = false
   config.cache_store = :null_store
 
   # Disable request forgery protection in test environment.
   config.action_controller.allow_forgery_protection = false
 
-  config.action_mailer.perform_caching = false
-
   # Tell Action Mailer not to deliver emails to the real world.
   # The :test delivery method accumulates sent emails in the
   # ActionMailer::Base.deliveries array.
   config.action_mailer.delivery_method = :test
-  config.action_mailer.default_url_options = {host: '127.0.0.1', :protocol => 'http'}
+
+  # Set host to be used by links generated in mailer templates.
+  config.action_mailer.default_url_options = {host: Capybara.server_host,
+                                              protocol: 'http'}
 
   # Print deprecation notices to the stderr.
   config.active_support.deprecation = :stderr
 
-  # Raise exceptions for disallowed deprecations.
-  config.active_support.disallowed_deprecation = :raise
-
-  # Tell Active Support which deprecation messages to disallow.
-  config.active_support.disallowed_deprecation_warnings = []
-
   # Raises error for missing translations.
   config.i18n.raise_on_missing_translations = true
 
   # Annotate rendered view with file names.
   # config.action_view.annotate_rendered_view_with_filenames = true
 
-  config.log_level = :info
+  # Raise error when a before_action's only/except options reference missing actions.
+  config.action_controller.raise_on_missing_callback_actions = true
 
-  # Allow the default integration test host.
+  # Allow Capybara application server IP
-  config.hosts << "www.example.com"
+  config.hosts |= [IPAddr.new(Capybara.server_host)]
+
+  config.log_level = :info
 end

config/initializers/assets.rb

@@ -5,8 +5,3 @@ Rails.application.config.assets.version = "1.0"
 
 # Add additional assets to the asset load path.
 # Rails.application.config.assets.paths << Emoji.images_path
-
-# Precompile additional assets.
-# application.js, application.css, and all non-JS/CSS in the app/assets
-# folder are already added.
-Rails.application.config.assets.precompile += %w( '*.svg' )

config/initializers/content_security_policy.rb

@@ -16,9 +16,13 @@
 #     # policy.report_uri "/csp-violation-report-endpoint"
 #   end
 #
-#   # Generate session nonces for permitted importmap and inline scripts
+#   # Generate session nonces for permitted importmap, inline scripts, and inline styles.
 #   config.content_security_policy_nonce_generator = ->(request) { request.session.id.to_s }
-#   config.content_security_policy_nonce_directives = %w(script-src)
+#   config.content_security_policy_nonce_directives = %w(script-src style-src)
+#
+#   # Automatically add `nonce` to `javascript_tag`, `javascript_include_tag`, and `stylesheet_link_tag`
+#   # if the corresponding directives are specified in `content_security_policy_nonce_directives`.
+#   # config.content_security_policy_nonce_auto = true
 #
 #   # Report violations without enforcing the policy.
 #   # config.content_security_policy_report_only = true

config/initializers/core_ext.rb

@@ -1,5 +1,6 @@
 require 'core_ext/array_delete_bang'
-require 'core_ext/big_decimal_scientific_notation'
+require 'core_ext/float'
+require 'core_ext/range'
 
 ActiveSupport.on_load :action_dispatch_system_test_case do
   prepend CoreExt::ActionDispatch::SystemTesting::TestHelpers::ScreenshotHelperUniqueId
@@ -10,9 +11,6 @@ ActiveSupport.on_load :action_view do
 end
 
 ActiveSupport.on_load :active_record do
-  ActiveModel::Validations::NumericalityValidator
-    .prepend CoreExt::ActiveModel::Validations::NumericalityValidatesPrecisionAndScale
-
   # Temporary patch for https://github.com/rails/rails/pull/54658
   Arel::TreeManager::StatementMethods
     .prepend CoreExt::Arel::TreeManager::StatementMethodsCteUpdateAndDelete

config/initializers/devise.rb

@@ -179,7 +179,7 @@ Devise.setup do |config|
 
   # ==> Configuration for :validatable
   # Range for password length.
-  config.password_length = 5..128
+  config.password_length = 5..32
 
   # Email regex used to validate email formats. It simply asserts that
   # one (and only one) @ exists in the given string. This is mainly

config/initializers/filter_parameter_logging.rb

@@ -1,8 +1,8 @@
 # Be sure to restart your server when you modify this file.
 
-# Configure parameters to be filtered from the log file. Use this to limit dissemination of
+# Configure parameters to be partially matched (e.g. passw matches password) and filtered from the log file.
-# sensitive information. See the ActiveSupport::ParameterFilter documentation for supported
+# Use this to limit dissemination of sensitive information.
-# notations and behaviors.
+# See the ActiveSupport::ParameterFilter documentation for supported notations and behaviors.
 Rails.application.config.filter_parameters += [
-  :passw, :secret, :token, :_key, :crypt, :salt, :certificate, :otp, :ssn
+  :passw, :secret, :token, :_key, :crypt, :salt, :certificate, :otp, :ssn, :cvv, :cvc
 ]

config/locales/en.yml

@@ -4,10 +4,6 @@ en:
       # Format contains non-breaking space: 160.chr(Encoding::UTF_8)
       default: "%Y-%m-%d %H:%M %Z"
       without_tz: "%Y-%m-%d %H:%M"
-  errors:
-    messages:
-      precision_exceeded: must not exceed %{value} significant digits
-      scale_exceeded: must not exceed %{value} decimal digits
   activerecord:
     attributes:
       quantity:
@@ -85,19 +81,10 @@ en:
     navigation: Measurements
     no_items: There are no measurements taken. You can Add some now.
     form:
-      select_quantity: select the measured quantity...
+      select_quantity: select quantities...
+      taken_at_html: Measurement taken at 
     index:
       new_measurement: Add measurement
-    create:
-      success: Measurement saved.
-    destroy:
-      success: Measurement deleted.
-    measurement:
-      destroy: Delete
-  readouts:
-    form:
-      select_unit: ...
-      new_children: Children
   quantities:
     navigation: Quantities
     no_items: There are no configured quantities. You can Add some or Import from defaults.
@@ -169,27 +156,7 @@ en:
           New password:
           <br><em>leave blank to keep unchanged</em>
           %{password_length_hint_html}
-  registrations:
-    destroy:
-      sole_admin: You cannot delete the only admin account.
   actions: Actions
-  setup:
-    new:
-      admin_account: Admin account
-      admin_email: 'E-mail:'
-      admin_password: 'Password:'
-      admin_password_confirmation: 'Retype password:'
-      options: Options
-      skip_email_confirmation: Skip e-mail confirmation for new registrations
-      seed_units: Seed built-in default units
-      submit: Set up
-    create:
-      email_blank: E-mail cannot be blank.
-      password_blank: Password cannot be blank.
-      password_mismatch: Passwords do not match.
-      success: >
-        Installation complete. You can now sign in with the admin account you
-        just created.
   add: Add
   apply: Apply
   back: Back

config/puma.rb.dist

@@ -1,43 +1,41 @@
-# Puma can serve each request in a thread from an internal thread pool.
+# This configuration file will be evaluated by Puma. The top-level methods that
-# The `threads` method setting takes two numbers: a minimum and maximum.
+# are invoked here are part of Puma's configuration DSL. For more information
-# Any libraries that use thread pools should be configured to match
+# about methods provided by the DSL, see https://puma.io/puma/Puma/DSL.html.
-# the maximum value specified for Puma. Default is set to 5 threads for minimum
-# and maximum; this matches the default thread size of Active Record.
 #
-max_threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 }
+# Puma starts a configurable number of processes (workers) and each process
-min_threads_count = ENV.fetch("RAILS_MIN_THREADS") { max_threads_count }
+# serves each request in a thread from an internal thread pool.
-threads min_threads_count, max_threads_count
-
-# Specifies the `worker_timeout` threshold that Puma will use to wait before
-# terminating a worker in development environments.
 #
-worker_timeout 3600 if ENV.fetch("RAILS_ENV", "development") == "development"
+# You can control the number of workers using ENV["WEB_CONCURRENCY"]. You
+# should only set this value when you want to run 2 or more workers. The
+# default is already 1.
+#
+# The ideal number of threads per worker depends both on how much time the
+# application spends waiting for IO operations and on how much you wish to
+# prioritize throughput over latency.
+#
+# As a rule of thumb, increasing the number of threads will increase how much
+# traffic a given process can handle (throughput), but due to CRuby's
+# Global VM Lock (GVL) it has diminishing returns and will degrade the
+# response time (latency) of the application.
+#
+# The default is set to 3 threads as it's deemed a decent compromise between
+# throughput and latency for the average Rails application.
+#
+# Any libraries that use a connection pool or another resource pool should
+# be configured to provide at least as many connections as the number of
+# threads. This includes Active Record's `pool` parameter in `database.yml`.
+threads_count = ENV.fetch("RAILS_MAX_THREADS", 3)
+threads threads_count, threads_count
 
 # Specifies the `port` that Puma will listen on to receive requests; default is 3000.
-#
+port ENV.fetch("PORT", 3000), '127.0.0.1'
-port ENV.fetch("PORT") { 3000 }
-
-# Specifies the `environment` that Puma will run in.
-#
-environment ENV.fetch("RAILS_ENV") { "development" }
-
-# Specifies the `pidfile` that Puma will use.
-pidfile ENV.fetch("PIDFILE") { "tmp/pids/server.pid" }
-
-# Specifies the number of `workers` to boot in clustered mode.
-# Workers are forked web server processes. If using threads and workers together
-# the concurrency of the application would be max `threads` * `workers`.
-# Workers do not work on JRuby or Windows (both of which do not support
-# processes).
-#
-# workers ENV.fetch("WEB_CONCURRENCY") { 2 }
-
-# Use the `preload_app!` method when specifying a `workers` number.
-# This directive tells Puma to first boot the application and load code
-# before forking the application. This takes advantage of Copy On Write
-# process behavior so workers use less memory.
-#
-# preload_app!
 
 # Allow puma to be restarted by `bin/rails restart` command.
 plugin :tmp_restart
+
+# Run the Solid Queue supervisor inside of Puma for single-server deployments
+plugin :solid_queue if ENV["SOLID_QUEUE_IN_PUMA"]
+
+# Specify the PID file. Defaults to tmp/pids/server.pid in development.
+# In other environments, only set the PID file if requested.
+pidfile ENV["PIDFILE"] if ENV["PIDFILE"]

config/routes.rb

@@ -1,10 +1,6 @@
 Rails.application.routes.draw do
-  # Web-based installation wizard — only reachable when no admin exists yet.
-  resource :setup, only: [:new, :create], controller: :setup
-
   resources :measurements
 
-
   resources :readouts, only: [:new] do
     collection {get 'new/:id/discard', action: :discard, as: :discard}
   end
@@ -19,7 +15,10 @@ Rails.application.routes.draw do
 
   namespace :default do
     resources :units, only: [:index, :destroy] do
-      member { post :import, :export }
+      member {
+        post :import
+        post :export
+      }
       #collection { post :import_all }
     end
   end

db/migrate/20230309185340_create_users.rb

@@ -1,11 +1,11 @@
-class CreateUsers < ActiveRecord::Migration[7.0]
+class CreateUsers < ActiveRecord::Migration[8.1]
   def change
     create_table :users do |t|
       t.string :email, null: false, limit: 64
       t.integer :status, null: false, default: 0
 
-      t.timestamps null: false
+      t.timestamps
     end
-    add_index :users, :email, unique: true
+    add_index :users, :email
   end
 end

db/migrate/20230311220654_add_devise_to_users.rb

@@ -1,4 +1,4 @@
-class AddDeviseToUsers < ActiveRecord::Migration[7.0]
+class AddDeviseToUsers < ActiveRecord::Migration[8.1]
   def change
     change_table :users do |t|
       ## NOTE: commented fields left for reference/inclusion in future migrations
@@ -34,8 +34,8 @@ class AddDeviseToUsers < ActiveRecord::Migration[7.0]
       # t.integer :failed_attempts, default: 0, null: false 
     end
 
-    add_index :users, :reset_password_token, unique: true
+    add_index :users, :reset_password_token
-    add_index :users, :confirmation_token, unique: true
+    add_index :users, :confirmation_token
     # add_index :users, :unlock_token, unique: true
   end
 end

db/migrate/20230602185352_create_units.rb

@@ -1,14 +1,15 @@
-class CreateUnits < ActiveRecord::Migration[7.0]
+class CreateUnits < ActiveRecord::Migration[8.1]
   def change
     create_table :units do |t|
-      t.references :user, foreign_key: true
+      t.references :user, foreign_key: {on_delete: :cascade}
       t.string :symbol, null: false, limit: 15
       t.text :description
-      t.decimal :multiplier, null: false, precision: 30, scale: 15, default: 1.0
+      t.float :multiplier, null: false, limit: Float::MANT_DIG, default: 1.0
       t.references :base, foreign_key: {to_table: :units, on_delete: :cascade}
 
-      t.timestamps null: false
+      t.timestamps
     end
-    add_index :units, [:user_id, :symbol], unique: true
+    add_index :units, [:user_id, :symbol]
+    add_index :units, [:id, :user_id]
   end
 end

db/migrate/20250104194343_create_quantities.rb

@@ -1,17 +1,18 @@
-class CreateQuantities < ActiveRecord::Migration[7.2]
+class CreateQuantities < ActiveRecord::Migration[8.1]
   def change
     create_table :quantities do |t|
-      t.references :user, foreign_key: true
+      t.references :user, foreign_key: {on_delete: :cascade}
       t.string :name, null: false, limit: 31
       t.text :description
       t.references :parent, foreign_key: {to_table: :quantities, on_delete: :cascade}
 
-      t.timestamps null: false
+      t.timestamps
 
       # Caches; can be computed from other attributes
       t.integer :depth, null: false, default: 0
       t.string :pathname, null: false, limit: 511
     end
-    add_index :quantities, [:user_id, :parent_id, :name], unique: true
+    add_index :quantities, [:user_id, :parent_id, :name]
+    add_index :quantities, [:id, :user_id]
   end
 end

db/migrate/20250121230456_create_readouts.rb

@@ -1,15 +1,69 @@
-class CreateReadouts < ActiveRecord::Migration[7.2]
+class CreateReadouts < ActiveRecord::Migration[8.1]
   def change
-    create_table :readouts do |t|
+    create_table :notes do |t|
-      t.references :user, null: false, foreign_key: true
+      t.text :text, null: false
-      t.references :quantity, null: false, foreign_key: true
+
-      t.references :unit, foreign_key: true
+      t.timestamps
-      t.decimal :value, null: false, precision: 30, scale: 15
+    end
+
+    create_table :measurements do |t|
+      t.datetime :taken_at, null: false
       #t.references :collector, foreign_key: true
       #t.references :device, foreign_key: true
+      t.references :note, foreign_key: {on_delete: :nullify}
 
-      t.timestamps null: false
+      t.timestamps
     end
-    add_index :readouts, [:quantity_id, :created_at], unique: true
+    add_index :measurements, :taken_at
+
+    # Defining Readouts as a super-/subclass polymorphic relations for different
+    # subclass data types (numeric, string, file) is not possible with proper
+    # referential integrity constraints. The required constraints are:
+    # * for every subclass record to have superclass record,
+    # * for every superclass record to have only one type of subclass record,
+    # * for every superclass record to have subclass record (unenforcable).
+    #   * this can be partially remedied by making superlass an abstract class in
+    #     Rails and disallow direct creation of records, but direct data
+    #     manipulation can still break referential integrity.
+    # Defining separate {Numeric,Text,File}_Readouts tables would make the
+    # unique index constraint unenforcable.
+    create_table :readouts do |t|
+      t.references :user, null: false, foreign_key: {on_delete: :cascade}
+      t.references :measurement, foreign_key: {on_delete: :cascade}
+      t.references :quantity, null: false, foreign_key: {on_delete: :cascade}
+      t.integer :category, null: false, default: 0
+      t.float :value, null: false, limit: Float::MANT_DIG
+      t.references :unit, null: false, foreign_key: {on_delete: :cascade}
+      # TODO: consider additional columns to allow wider range of value types
+      # t.text :text
+      # t.datetime :time
+      # t.references :file
+      # Possibly mutually exclusive with :unit or check constraint for:
+      #   :unit is not null <=> :value is not null
+
+      t.timestamps
+    end
+    add_index :readouts, [:measurement_id, :quantity_id, :category]
+    add_foreign_key :readouts, :quantities, column: [:quantity_id, :user_id],
+      primary_key: [:id, :user_id]
+    add_foreign_key :readouts, :units, column: [:unit_id, :user_id],
+      primary_key: [:id, :user_id]
+
+    # TODO: remove below tables after current setup verified
+    #create_table :numeric_values do |t|
+    #  t.references :readout, null: false, foreign_key: {on_delete: :cascade}
+    #  t.float :value, null: false, limit: Float::MANT_DIG
+    #  t.references :unit, null: false, foreign_key: {on_delete: :cascade}
+    #  # + generated, not stored column :value_type
+    #  # + foreign key constraint to readouts: [:readout_id, :value_id, :value_type]
+    #  # or 2 constraints: [:readout_id, :value_id], [:value_id, :value_type]
+    #  # if readouts.value_id needed, otherwise just one constraint:
+    #  # [:readout_id, :value_type]
+    #end
+
+    #create_table :string_values do |t|
+    #  t.references :readout, null: false, foreign_key: {on_delete: :cascade}
+    #  t.string :value, null: false, limit: 32
+    #end
   end
 end

db/migrate/20260228171524_create_settings.rb

@@ -1,12 +0,0 @@
-class CreateSettings < ActiveRecord::Migration[7.2]
-  def change
-    create_table :settings do |t|
-      t.string :key, null: false
-      t.string :value
-
-      t.timestamps
-    end
-
-    add_index :settings, :key, unique: true
-  end
-end

db/schema.rb

@@ -10,7 +10,22 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.2].define(version: 2025_01_21_230456) do
+ActiveRecord::Schema[8.1].define(version: 2025_01_21_230456) do
+  create_table "measurements", charset: "utf8mb4", collation: "utf8mb4_0900_as_ci", force: :cascade do |t|
+    t.datetime "taken_at", null: false
+    t.bigint "note_id"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["note_id"], name: "index_measurements_on_note_id"
+    t.index ["taken_at"], name: "index_measurements_on_taken_at", unique: true
+  end
+
+  create_table "notes", charset: "utf8mb4", collation: "utf8mb4_0900_as_ci", force: :cascade do |t|
+    t.text "text", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+  end
+
   create_table "quantities", charset: "utf8mb4", collation: "utf8mb4_0900_as_ci", force: :cascade do |t|
     t.bigint "user_id"
     t.string "name", limit: 31, null: false
@@ -20,6 +35,7 @@ ActiveRecord::Schema[7.2].define(version: 2025_01_21_230456) do
     t.datetime "updated_at", null: false
     t.integer "depth", default: 0, null: false
     t.string "pathname", limit: 511, null: false
+    t.index ["id", "user_id"], name: "index_quantities_on_id_and_user_id", unique: true
     t.index ["parent_id"], name: "index_quantities_on_parent_id"
     t.index ["user_id", "parent_id", "name"], name: "index_quantities_on_user_id_and_parent_id_and_name", unique: true
     t.index ["user_id"], name: "index_quantities_on_user_id"
@@ -27,13 +43,18 @@ ActiveRecord::Schema[7.2].define(version: 2025_01_21_230456) do
 
   create_table "readouts", charset: "utf8mb4", collation: "utf8mb4_0900_as_ci", force: :cascade do |t|
     t.bigint "user_id", null: false
+    t.bigint "measurement_id"
     t.bigint "quantity_id", null: false
-    t.bigint "unit_id"
+    t.integer "category", default: 0, null: false
-    t.decimal "value", precision: 30, scale: 15, null: false
+    t.float "value", limit: 53, null: false
+    t.bigint "unit_id", null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
-    t.index ["quantity_id", "created_at"], name: "index_readouts_on_quantity_id_and_created_at", unique: true
+    t.index ["measurement_id", "quantity_id", "category"], name: "index_readouts_on_measurement_id_and_quantity_id_and_category", unique: true
+    t.index ["measurement_id"], name: "index_readouts_on_measurement_id"
+    t.index ["quantity_id", "user_id"], name: "fk_rails_9d92eaafc6"
     t.index ["quantity_id"], name: "index_readouts_on_quantity_id"
+    t.index ["unit_id", "user_id"], name: "fk_rails_348b0fb4c5"
     t.index ["unit_id"], name: "index_readouts_on_unit_id"
     t.index ["user_id"], name: "index_readouts_on_user_id"
   end
@@ -42,11 +63,12 @@ ActiveRecord::Schema[7.2].define(version: 2025_01_21_230456) do
     t.bigint "user_id"
     t.string "symbol", limit: 15, null: false
     t.text "description"
-    t.decimal "multiplier", precision: 30, scale: 15, default: "1.0", null: false
+    t.float "multiplier", limit: 53, default: 1.0, null: false
     t.bigint "base_id"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.index ["base_id"], name: "index_units_on_base_id"
+    t.index ["id", "user_id"], name: "index_units_on_id_and_user_id", unique: true
     t.index ["user_id", "symbol"], name: "index_units_on_user_id_and_symbol", unique: true
     t.index ["user_id"], name: "index_units_on_user_id"
   end
@@ -69,11 +91,15 @@ ActiveRecord::Schema[7.2].define(version: 2025_01_21_230456) do
     t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
   end
 
+  add_foreign_key "measurements", "notes", on_delete: :nullify
   add_foreign_key "quantities", "quantities", column: "parent_id", on_delete: :cascade
-  add_foreign_key "quantities", "users"
+  add_foreign_key "quantities", "users", on_delete: :cascade
-  add_foreign_key "readouts", "quantities"
+  add_foreign_key "readouts", "measurements", on_delete: :cascade
-  add_foreign_key "readouts", "units"
+  add_foreign_key "readouts", "quantities", column: ["quantity_id", "user_id"], primary_key: ["id", "user_id"]
-  add_foreign_key "readouts", "users"
+  add_foreign_key "readouts", "quantities", on_delete: :cascade
+  add_foreign_key "readouts", "units", column: ["unit_id", "user_id"], primary_key: ["id", "user_id"]
+  add_foreign_key "readouts", "units", on_delete: :cascade
+  add_foreign_key "readouts", "users", on_delete: :cascade
   add_foreign_key "units", "units", column: "base_id", on_delete: :cascade
-  add_foreign_key "units", "users"
+  add_foreign_key "units", "users", on_delete: :cascade
 end

db/seeds.rb

@@ -3,32 +3,25 @@
 #   bin/rails db:seed
 # command (or created alongside the database with db:setup).
 # Seeding process should be idempotent.
-#
-# Admin account setup
-# -------------------
-# The preferred way to create the first admin account is through the web setup
-# wizard, which is shown automatically on the first visit when no admin exists.
-# The wizard also lets you configure runtime options (e.g. skip e-mail
-# confirmation) and seed the default units without using the command line.
-#
-# The block below provides an alternative CLI path for headless / automated
-# deployments.  It is skipped when an admin account already exists (e.g. after
-# the web wizard has run).
 
 User.transaction do
   break if User.find_by status: :admin
 
-  User.create! email: Rails.configuration.admin, password: 'admin', status: :admin do |user|
+  email = Rails.configuration.admin
+  password_length = SecureRandom.rand(Rails.configuration.devise.password_length)
+  password = SecureRandom.alphanumeric(password_length)
+
+  User.create!(email: email, password: password, status: :admin) do |user|
     user.skip_confirmation!
-    print "Creating #{user.status} account '#{user.email}' with password '#{user.password}'..."
+    print "Creating #{user.status} account '#{user.email}'" \
+      " with password '#{user.password}'..."
   end
   puts "done."
-
 rescue ActiveRecord::RecordInvalid => exception
-  puts "failed. #{exception.message}"
+  puts "failed.", exception.message
 end
 
 # Formulas will be deleted as dependent on Quantities
 #[Source, Quantity, Unit].each { |model| model.defaults.delete_all }
 
-require_relative 'seeds/units.rb'
+load "db/seeds/units.rb"

db/seeds/templates/units.erb

@@ -4,7 +4,7 @@ Unit.transaction do
 <% Unit.defaults.ordered.each do |unit| %>
 <%= "\n" if unit.base.nil? %>
   units['<%= unit.symbol %>'] =
-    Unit.create symbol: '<%= unit.symbol %>',<% unless unit.base.nil? %> base: units['<%= unit.base.symbol %>'], multiplier: '<%= unit.multiplier.to_scientific %>',<% end %>
+    Unit.create symbol: '<%= unit.symbol %>',<% if unit.base_id? %> base: units['<%= unit.base.symbol %>'], multiplier: '<%= unit.multiplier.to_scientific %>',<% end %>
                 description: '<%= unit.description %>'
 <% end %>
 end

db/sqlite3_schema.rb

@@ -0,0 +1,103 @@
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# This file is the source Rails uses to define your schema when running `bin/rails
+# db:schema:load`. When creating a new database, `bin/rails db:schema:load` tends to
+# be faster and is potentially less error prone than running all of your
+# migrations from scratch. Old migrations may fail to apply correctly if those
+# migrations use external dependencies or application code.
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema[8.1].define(version: 2025_01_21_230456) do
+  create_table "measurements", force: :cascade do |t|
+    t.datetime "taken_at", null: false
+    t.integer "note_id"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["note_id"], name: "index_measurements_on_note_id"
+    t.index ["taken_at"], name: "index_measurements_on_taken_at", unique: true
+  end
+
+  create_table "notes", force: :cascade do |t|
+    t.text "text", limit: 65535, null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+  end
+
+  create_table "quantities", force: :cascade do |t|
+    t.integer "user_id"
+    t.string "name", limit: 31, null: false
+    t.text "description", limit: 65535
+    t.integer "parent_id"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.integer "depth", default: 0, null: false
+    t.string "pathname", limit: 511, null: false
+    t.index ["id", "user_id"], name: "index_quantities_on_id_and_user_id", unique: true
+    t.index ["parent_id"], name: "index_quantities_on_parent_id"
+    t.index ["user_id", "parent_id", "name"], name: "index_quantities_on_user_id_and_parent_id_and_name", unique: true
+    t.index ["user_id"], name: "index_quantities_on_user_id"
+  end
+
+  create_table "readouts", force: :cascade do |t|
+    t.integer "user_id", null: false
+    t.integer "measurement_id"
+    t.integer "quantity_id", null: false
+    t.integer "category", default: 0, null: false
+    t.float "value", limit: 53, null: false
+    t.integer "unit_id", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["measurement_id", "quantity_id", "category"], name: "index_readouts_on_measurement_id_and_quantity_id_and_category", unique: true
+    t.index ["measurement_id"], name: "index_readouts_on_measurement_id"
+    t.index ["quantity_id"], name: "index_readouts_on_quantity_id"
+    t.index ["unit_id"], name: "index_readouts_on_unit_id"
+    t.index ["user_id"], name: "index_readouts_on_user_id"
+  end
+
+  create_table "units", force: :cascade do |t|
+    t.integer "user_id"
+    t.string "symbol", limit: 15, null: false
+    t.text "description", limit: 65535
+    t.float "multiplier", limit: 53, default: 1.0, null: false
+    t.integer "base_id"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["base_id"], name: "index_units_on_base_id"
+    t.index ["id", "user_id"], name: "index_units_on_id_and_user_id", unique: true
+    t.index ["user_id", "symbol"], name: "index_units_on_user_id_and_symbol", unique: true
+    t.index ["user_id"], name: "index_units_on_user_id"
+  end
+
+  create_table "users", force: :cascade do |t|
+    t.string "email", limit: 64, null: false
+    t.integer "status", default: 0, null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.string "encrypted_password", default: "", null: false
+    t.string "reset_password_token"
+    t.datetime "reset_password_sent_at"
+    t.datetime "remember_created_at"
+    t.string "confirmation_token"
+    t.datetime "confirmed_at"
+    t.datetime "confirmation_sent_at"
+    t.string "unconfirmed_email", limit: 64
+    t.index ["confirmation_token"], name: "index_users_on_confirmation_token", unique: true
+    t.index ["email"], name: "index_users_on_email", unique: true
+    t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
+  end
+
+  add_foreign_key "measurements", "notes", on_delete: :nullify
+  add_foreign_key "quantities", "quantities", column: "parent_id", on_delete: :cascade
+  add_foreign_key "quantities", "users", on_delete: :cascade
+  add_foreign_key "readouts", "measurements", on_delete: :cascade
+  add_foreign_key "readouts", "quantities", column: ["quantity_id", "user_id"], primary_key: ["id", "user_id"]
+  add_foreign_key "readouts", "quantities", on_delete: :cascade
+  add_foreign_key "readouts", "units", column: ["unit_id", "user_id"], primary_key: ["id", "user_id"]
+  add_foreign_key "readouts", "units", on_delete: :cascade
+  add_foreign_key "readouts", "users", on_delete: :cascade
+  add_foreign_key "units", "units", column: "base_id", on_delete: :cascade
+  add_foreign_key "units", "users", on_delete: :cascade
+end

lib/core_ext/active_model/validations/numericality_validates_precision_and_scale.rb

@@ -1,19 +0,0 @@
-module CoreExt::ActiveModel::Validations::NumericalityValidatesPrecisionAndScale
-  def validate_each(record, attr_name, value, ...)
-    super(record, attr_name, value, ...)
-
-    if options[:precision] || options[:scale]
-      attr_type = record.class.type_for_attribute(attr_name)
-      # For conversion of 'value' to BigDecimal 'ndigits' is not supplied intentionally,
-      # to avoid silent rounding. It is only required for conversion from Float and
-      # Rational, which should not happen.
-      value = BigDecimal(value) unless value.is_a? BigDecimal
-      if options[:precision] && (value.precision > attr_type.precision)
-        record.errors.add(attr_name, :precision_exceeded, **filtered_options(attr_type.precision))
-      end
-      if options[:scale] && (value.scale > attr_type.scale)
-        record.errors.add(attr_name, :scale_exceeded, **filtered_options(attr_type.scale))
-      end
-    end
-  end
-end

lib/core_ext/big_decimal_scientific_notation.rb

@@ -1,36 +0,0 @@
-module CoreExt
-  module BigDecimalScientificNotation
-    def to_scientific
-      return 'NaN' unless finite?
-
-      sign, coefficient, base, exponent = split
-      (sign == -1 ? '-' : '') +
-        (coefficient.length > 1 ? coefficient.insert(1, '.') : coefficient) +
-        (exponent != 1 ? "e#{exponent-1}" : '')
-    end
-
-    # Converts value to HTML formatted scientific notation
-    def to_html
-      sign, coefficient, base, exponent = split
-      return 'NaN' unless sign
-
-      result = (sign == -1 ? '-' : '')
-      unless coefficient == '1' && sign == 1
-        if coefficient.length > 1
-          result += coefficient.insert(1, '.')
-        elsif
-          result += coefficient
-        end
-        if exponent != 1
-          result += "×"
-        end
-      end
-      if exponent != 1
-        result += "10<sup>% d</sup>" % [exponent-1]
-      end
-      result.html_safe
-    end
-  end
-end
-
-BigDecimal.prepend CoreExt::BigDecimalScientificNotation

lib/core_ext/float.rb

@@ -0,0 +1,54 @@
+# If a decimal string with at most 15 significant digits is converted to the
+# IEEE 754 double-precision format, giving a normal number, and then converted
+# back to a decimal string with the same number of digits, the final result
+# should match the original string.
+# If an IEEE 754 double-precision number is converted to a decimal string with
+# at least 17 significant digits, and then converted back to double-precision
+# representation, the final result must match the original number:
+#   ("%.16e" % self).to_f == self
+class Float
+  def to_scientific
+    sign, significand, exponent = split
+    sign + significand + (exponent != 0 ? "e#{exponent}" : '')
+  end
+
+  # Converts value to HTML formatted scientific notation.
+  def to_html(show_unity: true)
+    result, significand, exponent = split
+    result += significand if significand != '1' || (exponent == 0 && show_unity)
+    if exponent != 0
+      result += "×" if significand != '1'
+      result += "10<sup>% d</sup>" % exponent
+    end
+    result.html_safe
+  end
+
+  # Assume #finite? is true.
+  def limit(precision = DIG)
+    return 0.0 if precision.zero?
+    sign, significand, exponent = split(DIG_MAX)
+    "#{sign}#{significand[..precision]}e#{exponent}".to_f
+  end
+
+  private
+
+  SPLIT_FLOAT = /(-?)(.*?)\.?0*e(.*)/
+
+  # Format `%e` displays starting from significant digit (not 0).
+  def split(digits = DIG)
+    return ['', to_s[..2], 0] unless finite?
+    return ['', '0', 0] if digits.zero?
+    ("%.#{digits - 1}e" % self).match(SPLIT_FLOAT).captures
+      .then { |sign, significand, exponent| [sign, significand, exponent.to_i] }
+  end
+
+  # The maximum number of significant decimal digits in a double-precision
+  # floating point number.
+  DIG_MAX = 17
+  # Smallest and largest double-precision floating point numbers with DIG
+  # precision.
+  # TODO: change MIN_15 to MIN.ceil(MIN_10_EXP - DIG) after #ceil fix in Ruby
+  # v4.0.5: https://bugs.ruby-lang.org/issues/22079
+  MIN_15 = MIN.ceil(-(MIN_10_EXP - 1))
+  MAX_15 = MAX.floor(-(MAX_10_EXP - DIG + 1))
+end

lib/core_ext/range.rb

@@ -0,0 +1,31 @@
+class Range
+  # TODO: cleanup comments after commit
+  # * < nil, true < false
+  #if a.end == b.end
+  #  a.exclude_end? ^ b.exclude_end? ? (a.exclude_end? ? -1 : 1) : 0
+  #else
+  #  a.end <=> b.end || (a.end.nil? ? 1 : -1)
+  #end
+  #a.end == b.end ? (b.exclude_end? ? b : a) : [a, b].to_h.except(nil).min
+  #*(l[0] == r[0] ? (r[1] ? r : l) : [l, r].reject{ |e| e[0].nil? }.min)
+  def &(other)
+    case other
+    when Range
+      return nil unless self.overlap?(other)
+
+      both = [self, other]
+      return Range.new(
+        both.map(&:begin).compact.max,
+        *if self.end == other.end
+           other.exclude_end? ? [other] : [self]
+        else
+          both.select(&:end)
+        end.map { |r| [r.end, r.exclude_end?] }.min
+      )
+    when Array
+      return other.map { |o| self & o }.compact
+    else
+      return self.member?(other) ? other : nil
+    end
+  end
+end

lib/default_settings_strategy.rb

@@ -0,0 +1,55 @@
+class DefaultSettingsStrategy < ActiveRecord::Migration::DefaultStrategy
+  COLUMN_DEFAULTS = {
+    # TODO: all types `null: false` ?
+    # TODO: references `foreign_key: {on_delete: :cascade}` ?
+    # `timestamps` - Rails defaults to `null: false, precision: true`.
+    # `limit:` for `text` - `text` can be theoretically up to 1GB or
+    #   longer, so roughly unlimited for practical purposes. But:
+    #   * the actual usable length depends on additional factors, like compile
+    #     time limits (`SQLITE_MAX_LENGTH` in SQLite), runtime settings
+    #     (`max_allowed_packet` in MySQL) and probably other,
+    #   * Rails does not report limit for `text` column types, unless it is
+    #     explicitly set.
+    #   The decision is to always set safe limit and enforce it by validations, to
+    #   avoid surprises (e.g. text truncation) when saving to dabatase.
+    text: {limit: 2**16 - 1}
+  }
+  COLUMN_DEFAULTS.default = {}
+  COLUMN_DEFAULTS.freeze
+
+  module ColumnSettingsStrategy
+    def column(name, type, **options)
+      super(name, type, **COLUMN_DEFAULTS[type].merge(options))
+    end
+  end
+  ActiveRecord::ConnectionAdapters::TableDefinition.prepend ColumnSettingsStrategy
+
+  # `force: :cascade` - does nothing on MySQL, so `force:` is useless.
+  # `if_not_exists: true`/`if_exists: true` - without these options it's impossible
+  #   to change migration status once migration fails partially. If `up` migration
+  #   creates some, but not all objects, its status is not updated from `down` to
+  #   `up`. Then it's impossible to migrate: a) up - due to `already exists`
+  #   errors and b) down - due to migration status.
+  MIGRATION_DEFAULTS = {
+    add_check_constraint: {if_not_exists: true},
+    add_column:           {if_not_exists: true},
+    add_foreign_key:      {if_not_exists: true},
+    add_index:            {if_not_exists: true, unique: true},
+    add_timestamps:       {if_not_exists: true},
+    create_table:         {if_not_exists: true},
+    drop_table:               {if_exists: true},
+    remove_check_constraint:  {if_exists: true},
+    remove_column:            {if_exists: true},
+    remove_foreign_key:       {if_exists: true},
+    remove_index:             {if_exists: true},
+    remove_timestamps:        {if_exists: true},
+  }
+  MIGRATION_DEFAULTS.default = {}
+  MIGRATION_DEFAULTS.freeze
+
+  def method_missing(method, *args, **kwargs, &)
+    conflicts = kwargs.has_key?(:force) ? [:if_not_exists, :if_exists] : []
+    defaults = MIGRATION_DEFAULTS[method.to_sym].except(*conflicts)
+    super(method, *args, **defaults.merge(kwargs), &)
+  end
+end

lib/tasks/test_multi_db.rake

@@ -1,50 +0,0 @@
-namespace :test do
-  desc "Run Rails tests against all supported database adapters (SQLite, MySQL)"
-  task :all_adapters do
-    # DATABASE_URL overrides the adapter from database.yml at runtime.
-    # MySQL requires the mysql2 gem: bundle install --with mysql
-    adapters = {
-      "SQLite" => {
-        "DATABASE_URL" => "sqlite3:db/test.sqlite3"
-      },
-      "MySQL" => {
-        "DATABASE_URL" => format(
-          "mysql2://%s:%s@%s/%s",
-          ENV.fetch("DATABASE_USERNAME", "root"),
-          ENV.fetch("DATABASE_PASSWORD", ""),
-          ENV.fetch("DATABASE_HOST", "127.0.0.1"),
-          ENV.fetch("DATABASE_NAME", "fixin_test")
-        )
-      }
-    }
-
-    failed = []
-
-    adapters.each do |name, extra_env|
-      puts "\n#{"=" * 60}"
-      puts "  Running tests with #{name}"
-      puts "=" * 60
-
-      env = ENV.to_h.merge("RAILS_ENV" => "test").merge(extra_env)
-
-      # Reset test database; db:drop may fail on first run — that's fine
-      system(env, "bin/rails db:drop")
-      unless system(env, "bin/rails db:create db:schema:load")
-        failed << "#{name} (database setup)"
-        next
-      end
-
-      failed << name unless system(env, "bin/rails test")
-    end
-
-    puts "\n#{"=" * 60}"
-    if failed.any?
-      puts "  FAILED: #{failed.join(", ")}"
-      puts "=" * 60
-      exit 1
-    else
-      puts "  All adapters passed!"
-      puts "=" * 60
-    end
-  end
-end

public/icon.svg

@@ -0,0 +1,3 @@
+<svg width="512" height="512" xmlns="http://www.w3.org/2000/svg">
+  <circle cx="256" cy="256" r="256" fill="red"/>
+</svg>

test/application_system_test_case.rb

@@ -17,17 +17,20 @@ class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
     options.add_preference('browser.download.dir', "#{Rails.root}/tmp/")
   end
 
-  def sign_in(user: users.select(&:confirmed?).sample, password: randomize_user_password!(user))
+  def sign_in(user: users.select(&:confirmed?).sample,
+              password: randomize_user_password!(user))
     visit new_user_session_url
     fill_in User.human_attribute_name(:email), with: user.email
     fill_in User.human_attribute_name(:password), with: password
     click_on t(:sign_in)
+    yield if block_given?
     user
   end
 
-  def inject_button_to(after, *button_options)
+  def inject_button_to(inside, *button_options)
     button = button_to *button_options
-    evaluate_script("arguments[0].insertAdjacentHTML('beforeend', '#{button.html_safe}');", after)
+    inside.evaluate_script("this.insertAdjacentHTML('beforeend', arguments[0]);",
+                           button.html_safe)
   end
 
   # Allow skipping interpolations when translating for testing purposes
@@ -38,6 +41,32 @@ class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
   end
   alias :t :translate
 
+  DB_CONFIGS = ActiveRecord::Base.configurations.configs_for(env_name: "test")
+  TEST_CONFIGS = Hash.new(DB_CONFIGS.first.name.to_sym)
+  class << self
+    # NOTE: alternative to current solution is to create shards:
+    #   ActiveRecord::Base.connects_to(
+    #     shards: {mysql2: {writing: :mysql2}, sqlite3: {writing: :sqlite3}}
+    #   )
+    # and use them in one of the following ways:
+    # * set config.active_record.shard_selector/shard_resolver
+    # * run tests within: ActiveRecord::Base.connected_to(shard: :sqlite3) { test_ }
+    # Remove this note once current solution is confirmed to work.
+    #
+    # Test block should not be modified here, as it would change its binding from
+    # instance level to class level.
+    if DB_CONFIGS.many?
+      def test(name, ...)
+        DB_CONFIGS.each do |config|
+          TEST_CONFIGS[super("#{config.name} #{name}", ...)] = config.name.to_sym
+        end
+      end
+    end
+  end
+  setup do
+    ActiveRecord::Base.establish_connection(TEST_CONFIGS[name.to_sym])
+  end
+
   #def assert_stale(element)
   #  assert_raises(Selenium::WebDriver::Error::StaleElementReferenceError) { element.tag_name }
   #end

test/controllers/default/units_controller_test.rb

@@ -1,12 +1,8 @@
 require "test_helper"
 
 class Default::UnitsControllerTest < ActionDispatch::IntegrationTest
-  setup do
-    sign_in users(:alice)
-  end
-
   test "should get index" do
-    get default_units_url
+    get units_defaults_index_url
     assert_response :success
   end
 end

test/controllers/measurements_controller_test.rb

@@ -1,8 +0,0 @@
-require "test_helper"
-
-class MeasurementsControllerTest < ActionDispatch::IntegrationTest
-  #test "should get index" do
-  #  get measurements_index_url
-  #  assert_response :success
-  #end
-end

test/controllers/quantities_controller_test.rb

@@ -1,7 +0,0 @@
-require "test_helper"
-
-class QuantitiesControllerTest < ActionDispatch::IntegrationTest
-  # test "the truth" do
-  #   assert true
-  # end
-end

test/controllers/registrations_controller_test.rb

@@ -1,18 +0,0 @@
-require "test_helper"
-
-class RegistrationsControllerTest < ActionDispatch::IntegrationTest
-  test "sole admin cannot delete account" do
-    sign_in users(:admin)
-    delete user_registration_path
-    assert_redirected_to edit_user_registration_path
-    assert_equal t("registrations.destroy.sole_admin"), flash[:alert]
-    assert User.exists?(users(:admin).id)
-  end
-
-  test "non-admin can delete account" do
-    sign_in users(:alice)
-    assert_difference ->{ User.count }, -1 do
-      delete user_registration_path
-    end
-  end
-end

test/controllers/units_controller_test.rb

@@ -1,7 +0,0 @@
-require "test_helper"
-
-class UnitsControllerTest < ActionDispatch::IntegrationTest
-  # test "the truth" do
-  #   assert true
-  # end
-end

test/controllers/users_controller_test.rb

@@ -1,10 +1,10 @@
 require "test_helper"
 
+# TODO: make sure tested actions are covered by system tests and remove all
+# controller tests.
 class UsersControllerTest < ActionDispatch::IntegrationTest
   setup do
-    @admin = users(:admin)
+    @user = users(:one)
-    @user = users(:alice)
-    sign_in @admin
   end
 
   test "should get index" do
@@ -12,25 +12,39 @@ class UsersControllerTest < ActionDispatch::IntegrationTest
     assert_response :success
   end
 
+  test "should get new" do
+    get new_user_url
+    assert_response :success
+  end
+
+  test "should create user" do
+    assert_difference("User.count") do
+      post users_url, params: { user: { email: @user.email, status: @user.status } }
+    end
+
+    assert_redirected_to user_url(User.last)
+  end
+
   test "should show user" do
     get user_url(@user)
     assert_response :success
   end
 
+  test "should get edit" do
+    get edit_user_url(@user)
+    assert_response :success
+  end
+
   test "should update user" do
-    patch user_url(@user), params: { user: { status: :restricted } }, as: :turbo_stream
+    patch user_url(@user), params: { user: { email: @user.email, status: @user.status } }
-    assert_equal "restricted", @user.reload.status
+    assert_redirected_to user_url(@user)
   end
 
-  test "should not update self" do
+  test "should destroy user" do
-    patch user_url(@admin), params: { user: { status: :active } }, as: :turbo_stream,
+    assert_difference("User.count", -1) do
-      headers: { "HTTP_REFERER" => users_url }
+      delete user_url(@user)
-    assert_response :redirect
+    end
-  end
 
-  test "should forbid non-admin" do
+    assert_redirected_to users_url
-    sign_in @user
-    get users_url
-    assert_response :forbidden
   end
 end

test/models/user_test.rb

@@ -1,7 +0,0 @@
-require "test_helper"
-
-class UserTest < ActiveSupport::TestCase
-  # test "the truth" do
-  #   assert true
-  # end
-end

test/system/tasks_test.rb

@@ -0,0 +1,20 @@
+require 'application_system_test_case'
+
+Rails.application.load_tasks
+# NOTE: for some reason task for checking pending migrations messes up
+# transaction when run during test. It causes all DB changes made before its
+# execution to be rolled back.
+# Run it before tests, so any rake task dependent on it will see it as
+# #already_invoked and won't run it during test. It is redundant anyway, as
+# migrations are run before starting test suite.
+Rake::Task['db:abort_if_pending_migrations'].invoke
+
+class TasksTest < ApplicationSystemTestCase
+  test "db:seed creates admin account" do
+    User.admin.delete_all
+    assert_output /Creating admin account/ do
+      Rake::Task['db:seed'].execute
+    end
+    assert User.admin.exists?
+  end
+end

test/system/units_test.rb

@@ -1,33 +1,36 @@
 require "application_system_test_case"
 
 # Fixture prerequisites:
-#  * user with multiple units + subunits
+#  * user with multiple units (at least 1 w/o subunit) + subunits,
-#  * user with single unit
+#  * user with single unit,
-#  * user with no units
+# FIXME: add confirmed user without units
+#  * user with no units.
+# Users need to be active and confirmed.
 
 class UnitsTest < ApplicationSystemTestCase
-  LINK_LABELS = {}
+  def sign_in(...)
+    @link_labels = nil
+    @user = super { click_on t('units.navigation') }
+  end
 
-  setup do
+  def link_labels
-    @user = sign_in
+    @link_labels ||= {
-
+      new_unit:     t('units.index.new_unit'),
-    LINK_LABELS.clear
+      new_subunit:  t('units.unit.new_subunit'),
-    LINK_LABELS[:new_unit] = t('units.index.new_unit')
+      edit:         Regexp.union(@user.units.map(&:symbol))
-    LINK_LABELS[:new_subunit] = t('units.unit.new_subunit')
+    }
-    LINK_LABELS[:edit] = Regexp.union(@user.units.map(&:symbol))
-
-    visit units_path
   end
 
   test "index" do
-    # Wait for the table to appear first, only then check row count
+    sign_in
+    # Wait for the table to appear first, only then check row count.
     within 'tbody' do
       assert_selector 'tr', count: @user.units.count
     end
 
-    # Cannot #destroy_all due to {dependent: :restrict*} on Unit.subunits association
+    # Cannot #destroy_all due to {dependent: :restrict*} on Unit.subunits association.
     @user.units.delete_all
-    visit units_path
+    refresh
     within 'tbody' do
       assert_selector 'tr', count: 1
       assert_text t('units.no_items')
@@ -35,7 +38,9 @@ class UnitsTest < ApplicationSystemTestCase
   end
 
   test "new and create" do
-    type, label = LINK_LABELS.assoc([:new_unit, :new_subunit].sample)
+    sign_in
+    link_labels.slice!(:new_unit, :new_subunit)
+    type, label = link_labels.to_a.sample
     new_link = all(:link, exact_text: label).sample
     new_link.click
     assert_equal 'disabled', new_link[:disabled]
@@ -44,10 +49,12 @@ class UnitsTest < ApplicationSystemTestCase
     within 'tbody > tr:has(input[type=text], textarea)' do
       assert_selector ':focus'
 
-      maxlength = all(:fillable_field).to_h { |f| [f[:name], f[:maxlength].to_i || 2**16] }
+      maxlength = all(:fillable_field).to_h do |field|
+        [field[:name], field[:maxlength].to_i || 2**16]
+      end
       values = {
-        symbol: random_string(rand([1..3, 4..maxlength['unit[symbol]']].sample),
+        symbol: random_string(deep_rand(1..3, 4..maxlength['unit[symbol]']),
-                              except: units.map(&:symbol)),
+                              except: @user.units.map(&:symbol), allow_blank: false),
         description: random_string(rand(0..maxlength['unit[description]']))
       }.with_indifferent_access
       within :field, 'unit[multiplier]' do |field|
@@ -61,34 +68,60 @@ class UnitsTest < ApplicationSystemTestCase
       end
     end
 
-    assert_selector '.flash.notice', text: t('units.create.success', unit: Unit.last.symbol)
+    assert_selector '.flash.notice',
+      text: t('units.create.success', unit: Unit.last.symbol)
     within 'tbody' do
       assert_no_selector :fillable_field
       assert_selector 'tr', count: @user.units.count
     end
     assert_no_selector :element, :a, 'disabled': 'disabled',
-      exact_text: Regexp.union(LINK_LABELS.fetch_values(:new_unit, :new_subunit))
+      exact_text: Regexp.union(link_labels.values)
     assert_equal values, Unit.last.attributes.slice(*values.keys)
   end
 
+  test "create updates view in order" do
+    # Destroy and re-create unit to verify its index position is unchanged.
+    sign_in(user: users.select { |u| u.confirmed? && u.units.many? }.sample)
+
+    link = all(:link_or_button, exact_text: t('units.unit.destroy')).sample
+    symbol = link.ancestor('tr').first(:link).text
+    index = link.ancestor('tbody').all('tr').index { |e| e.first(:link).text == symbol }
+    unit = @user.units.find_by(symbol: symbol)
+
+    link.click
+    if unit.base_id?
+      find_link(unit.base.symbol).ancestor('tr').click_on(t('units.unit.new_subunit'))
+      fill_in 'unit[multiplier]', with: unit.multiplier
+    else
+      click_on t('units.index.new_unit')
+    end
+    fill_in 'unit[symbol]', with: unit.symbol
+    click_on t('helpers.submit.create')
+
+    within "tbody > tr:nth-child(#{index+1})" do
+      assert_selector :link, exact_text: symbol
+    end
+  end
+
   test "new and edit on validation error" do
-    # It's not possible to cause validation error on :edit with single unit
+    sign_in
-    LINK_LABELS.delete(:edit) unless @user.units.count > 1
+    # It's impossible to cause validation error on :edit with single unit.
-    type, label = LINK_LABELS.to_a.sample
+    link_labels.delete(:edit) unless @user.units.many?
+    type, label = link_labels.to_a.sample
     link = all(:link, exact_text: label).sample
     link.click
 
     get_values = -> { all(:field).map { |f| [f[:name], f[:value]] }.to_h }
     values = nil
     within 'tbody > tr:has(input[type=text])' do
-      # Provide duplicate :symbol as input invalidatable server side
+      # Provide duplicate :symbol as input invalidatable server side.
       fill_in 'unit[symbol]',
         with: (@user.units.map(&:symbol) - [find_field('unit[symbol]').value]).sample
       values = get_values[]
       send_keys :enter
     end
 
-    # Wait for flash before checking link :disabled status
+    # Wait for flash before checking link :disabled status.
     assert_selector '.flash.alert'
     if type == :edit
       assert_no_selector :link, exact_text: link[:text]
@@ -102,15 +135,18 @@ class UnitsTest < ApplicationSystemTestCase
   end
 
   test "new and edit allow opening multiple forms" do
-    # Requires at least 1 unit to be able to open 2 forms
+    # Require at least 1 unit to be able to open 2 forms.
-    links = LINK_LABELS.transform_values { |labels| all(:link, exact_text: labels).to_a }
+    sign_in(user: users.select { |u| u.confirmed? && u.units.any? }.sample)
+    links = link_labels.transform_values do |labels|
+      all(:link, exact_text: labels).to_a
+    end
     random_link = ->{ links.transform_values(&:sample).compact.to_a.sample }
-    # Define tr count change depending on link clicked
+    # Define <tr> count change depending on link clicked.
     tr_diff = {new_unit: 1, new_subunit: 1, edit: 0}
 
     type, link = random_link[].tap { |t, l| links[t].delete(l) }
     subunit_link = link.ancestor('tr')
-      .first(:link, LINK_LABELS[:new_subunit], between: 0..1) if type == :edit
+      .first(:link, link_labels[:new_subunit], between: 0..1) if type == :edit
     assert_difference ->{ all('tbody tr').count }, tr_diff[type] do
       assert_difference ->{ all('tbody tr:has(input[type=text])').count }, 1 do
         link.click
@@ -135,12 +171,14 @@ class UnitsTest < ApplicationSystemTestCase
     assert_not_equal form, find('tbody tr:has(input:focus)')
   end
 
-  #test "edit" do
+  test "edit" do
     # NOTE: Check if displayed attributes match record
-  #end
+    assert true
+  end
 
   # NOTE: extend with any add/edit link
-  test "close new unit form with escape key" do
+  test "new form closes on escape key" do
+    sign_in
     click_on t('units.index.new_unit')
     first('tbody > tr').all(:field).sample.send_keys :escape
     within 'tbody' do
@@ -149,7 +187,8 @@ class UnitsTest < ApplicationSystemTestCase
   end
 
   # NOTE: extend with any add/edit link
-  test "close and reopen new unit form" do
+  test "new form can be reopened after close" do
+    sign_in
     click_on t('units.index.new_unit')
     within 'tbody' do
       find(:link_or_button, exact_text: t(:cancel)).click
@@ -159,13 +198,19 @@ class UnitsTest < ApplicationSystemTestCase
     assert_selector 'tbody > tr:has(input, textarea)'
   end
 
+  test "rebase" do
+    # TODO
+    assert true
+  end
+
   test "destroy" do
+    sign_in(user: users.select { |u| u.confirmed? && u.units.any? }.sample)
     link = all(:link_or_button, exact_text: t('units.unit.destroy')).sample
-    label = link.ancestor('tr').first(:link)[:text]
+    symbol = link.ancestor('tr').first(:link).text
     assert_difference ->{ @user.units.count }, -1 do
       link.click
     end
     assert_selector 'tbody tr', count: [@user.units.count, 1].max
-    assert_selector '.flash.notice', text: t('units.destroy.success', unit: label)
+    assert_selector '.flash.notice', text: t('units.destroy.success', unit: symbol)
   end
 end

test/system/users_test.rb

@@ -1,5 +1,6 @@
 require "application_system_test_case"
 
+# TODO: review #visit usage and replace with #click_on where applicable
 class UsersTest < ApplicationSystemTestCase
   setup do
     @admin = users(:admin)
@@ -183,7 +184,7 @@ class UsersTest < ApplicationSystemTestCase
   end
 
   test 'delete profile' do
-    user = sign_in user: users.reject(&:admin?).select(&:confirmed?).sample
+    user = sign_in
     # TODO: remove condition after root_url changed to different path than
     # profile in routes.rb
     unless has_current_path?(edit_user_registration_path)
@@ -196,14 +197,6 @@ class UsersTest < ApplicationSystemTestCase
     assert_text t("devise.registrations.destroyed")
   end
 
-  test 'sole admin cannot delete profile' do
-    sign_in user: users(:admin)
-    unless has_current_path?(edit_user_registration_path)
-      first(:link_or_button, users(:admin).email).click
-    end
-    assert find(:button, t("users.registrations.edit.delete"))[:disabled]
-  end
-
   test 'index forbidden for non admin' do
     sign_in user: users.reject(&:admin?).select(&:confirmed?).sample
     visit users_path
@@ -212,6 +205,7 @@ class UsersTest < ApplicationSystemTestCase
 
   test 'update profile' do
     # TODO
+    assert true
   end
 
   test 'update status' do
@@ -235,7 +229,8 @@ class UsersTest < ApplicationSystemTestCase
 
     within all(:xpath, "//tbody//tr[not(descendant::select)]").sample do |tr|
       user = User.find_by_email!(first(:link).text)
-      inject_button_to first('td:not(.link)'), "update status", user_path(user), method: :patch,
+      inject_button_to find('td', exact_text: user.status), "update status",
+        user_path(user), method: :patch,
         params: {user: {status: User.statuses.keys.sample}}, data: {turbo: false}
       click_on "update status"
     end
@@ -245,8 +240,8 @@ class UsersTest < ApplicationSystemTestCase
   test 'update status forbidden for non admin' do
     sign_in user: users.reject(&:admin?).select(&:confirmed?).sample
     visit units_path
-    inject_button_to find('body'), "update status", user_path(User.all.sample), method: :patch,
+    inject_button_to find('body'), "update status", user_path(User.all.sample),
-      params: {user: {status: User.statuses.keys.sample}}
+      method: :patch, params: {user: {status: User.statuses.keys.sample}}
     click_on "update status"
     assert_text t('actioncontroller.exceptions.status.forbidden')
   end

test/test_helper.rb

@@ -2,14 +2,7 @@ ENV["RAILS_ENV"] ||= "test"
 require_relative "../config/environment"
 require "rails/test_help"
 
-class ActionDispatch::IntegrationTest
-  include Devise::Test::IntegrationHelpers
-end
-
 class ActiveSupport::TestCase
-  # Run tests in parallel with specified workers
-  parallelize(workers: :number_of_processors)
-
   # Setup all fixtures in test/fixtures/*.yml for all tests in alphabetical order.
   fixtures :all
 
@@ -17,27 +10,100 @@ class ActiveSupport::TestCase
   include ActionView::Helpers::TranslationHelper
 
   # List of categorized Unicode characters:
-  # * http://www.unicode.org/Public/UNIDATA/UnicodeData.txt
+  #   * source: http://www.unicode.org/Public/UNIDATA/UnicodeData.txt
-  # File format: http://www.unicode.org/L2/L1999/UnicodeData.html
+  #   * file format: http://www.unicode.org/L2/L1999/UnicodeData.html
-  # Select from graphic ranges: L, M, N, P, S, Zs
+  #   * select from graphic ranges: L, M, N, P, S, Zs
-  UNICODE_CHARS = {
+  UNICODE_CHARS = [
-    1 => [*"\u0020".."\u007E"],
+    *"\u0020".."\u007E",
-    2 => [*"\u00A0".."\u00AC",
+    *"\u00A0".."\u00AC",
-          *"\u00AE".."\u05FF",
+    *"\u00AE".."\u05FF",
-          *"\u0606".."\u061B",
+    *"\u0606".."\u061B",
-          *"\u061D".."\u06DC",
+    *"\u061D".."\u06DC",
-          *"\u06DE".."\u070E",
+    *"\u06DE".."\u070E",
-          *"\u0710".."\u07FF"]
+    *"\u0710".."\u07FF"
-  }
+  ]
-  UNICODE_CHARS.default = UNICODE_CHARS[1] + UNICODE_CHARS[2]
+  def random_string(length, except: [], allow_blank: true)
-  def random_string(bytes = 10, except: [])
+    # Rails String#blank? is based on [[:space:]] character class (String::BLANK_RE).
+    # Here we use more general class including tabs, cariage returns and newlines.
+    except << /^\p{Space}+$/ unless allow_blank
     begin
-      result = ''
+      result = UNICODE_CHARS.sample(length).join
-      result += UNICODE_CHARS[bytes - result.bytesize].sample while bytes > result.bytesize
+    end while except.any? { |e| e === result }
-    end while except.include?(result)
     result
   end
 
+  # Range based string generation. Not finished, but saved as a potential
+  # reference for future work. To work properly it needs to sort in collation
+  # order of database.
+  #def random_between(from, to, maxlength)
+  #  # TODO: sort UNICODE_CHARS
+  #  byebug
+  #  result = ''
+  #  maxlength.times do |i|
+  #    case
+  #    when from[i] == to[i]
+  #      result += from[i]
+  #    else
+  #      from_index = UNICODE_CHARS.bsearch_index(from[i] || UNICODE_CHARS[0])
+  #      to_index = UNICODE_CHARS.bsearch_index(to[i])
+  #      index = rand(from_index..to_index)
+  #      case
+  #      when index == from_index
+  #        result += UNICODE_CHARS[index]
+  #        from[i+1..].each_char do |c|
+  #          from_index = UNICODE_CHARS.bsearch_index(from[i])
+  #          index = rand(from_index..UNICODE_CHARS.length-1)
+  #          result += UNICODE_CHARS[index]
+  #          break if index != from_index
+  #        end
+  #        if result == from
+  #          if result.length < maxlength
+  #            result += UNICODE_CHARS.sample
+  #          else
+  #            # TODO: succ result[i..]
+  #            # raise if result == to
+  #          end
+  #        end
+  #        break
+  #      when index == to_index
+  #        result += UNICODE_CHARS[index]
+  #        to[i+1..].each_char do |c|
+  #          to_index = UNICODE_CHARS.bsearch_index(to[i])
+  #          index = rand(-1..to_index)
+  #          break if index == -1
+  #          result += UNICODE_CHARS[index]
+  #          break if index != to_index
+  #        end
+  #        if result == to
+  #          if result.length > i+1
+  #            result = result[..-2]
+  #          else
+  #            # TODO: prev result[i..]
+  #            # raise if result == from
+  #          end
+  #        end
+  #        break
+  #      else
+  #        result += UNICODE_CHARS[index]
+  #        break
+  #      end
+  #    end
+  #  end
+  #  return result += UNICODE_CHARS.sample(rand(0..maxlength-i-1)).join
+  #  # if result == from/to ...
+  #end
+
+  def deep_rand(*args)
+    case args
+    when Array
+      args = args.sample
+    when Range
+      args = rand(args)
+    else
+      return args
+    end while true
+  end
+
   # Assumes: max >= step and step = 1e[-]N, both as strings
   def random_number(max, step)
     max.delete!('.')