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Set constraints on Readouts.user_id foreign key

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Add Measurements table
This commit is contained in:
cryptogopher
2026-05-05 20:33:21 +02:00
parent 4a36ffc8bf
commit d3a34233b9
10 changed files with 107 additions and 22 deletions
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1
db/migrate/20230602185352_create_units.rb
View File

@@ -10,5 +10,6 @@ class CreateUnits < ActiveRecord::Migration[8.1]
t.timestamps
end
add_index :units, [:user_id, :symbol]
add_index :units, [:id, :user_id]
end
end

1
db/migrate/20250104194343_create_quantities.rb
View File

@@ -13,5 +13,6 @@ class CreateQuantities < ActiveRecord::Migration[8.1]
t.string :pathname, null: false, limit: 511
end
add_index :quantities, [:user_id, :parent_id, :name]
add_index :quantities, [:id, :user_id]
end
end

61
db/migrate/20250121230456_create_readouts.rb
View File

@@ -1,16 +1,63 @@
class CreateReadouts < ActiveRecord::Migration[8.1]
def change
create_table :readouts do |t|
t.references :user, null: false, foreign_key: {on_delete: :cascade}
t.references :quantity, null: false, foreign_key: true
# :category + :value + :unit as a separate table? (NumericValue, TextValue)
t.integer :category, null: false, default: 0
t.float :value, null: false, limit: Float::MANT_DIG
t.references :unit, foreign_key: true
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: true
t.timestamps
end
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

26
db/schema.rb
View File

@@ -10,7 +10,14 @@
#
# It's strongly recommended that you check this file into your version control system.
ActiveRecord::Schema[8.0].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.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["taken_at"], name: "index_measurements_on_taken_at", unique: true
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 +27,7 @@ ActiveRecord::Schema[8.0].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"
@@ -27,14 +35,18 @@ ActiveRecord::Schema[8.0].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.integer "category", default: 0, null: false
t.float "value", limit: 53, null: false
t.bigint "unit_id"
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
@@ -48,6 +60,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_01_21_230456) do
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
@@ -72,8 +85,11 @@ ActiveRecord::Schema[8.0].define(version: 2025_01_21_230456) do
add_foreign_key "quantities", "quantities", column: "parent_id", on_delete: :cascade
add_foreign_key "quantities", "users", on_delete: :cascade
add_foreign_key "readouts", "quantities"
add_foreign_key "readouts", "units"
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

23
db/sqlite3_schema.rb
View File

@@ -10,7 +10,13 @@
#
# It's strongly recommended that you check this file into your version control system.
ActiveRecord::Schema[8.0].define(version: 2025_01_21_230456) do
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.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
@@ -20,6 +26,7 @@ ActiveRecord::Schema[8.0].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 +34,15 @@ ActiveRecord::Schema[8.0].define(version: 2025_01_21_230456) do
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"
t.integer "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"], 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"
@@ -48,6 +57,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_01_21_230456) do
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
@@ -72,8 +82,11 @@ ActiveRecord::Schema[8.0].define(version: 2025_01_21_230456) do
add_foreign_key "quantities", "quantities", column: "parent_id", on_delete: :cascade
add_foreign_key "quantities", "users", on_delete: :cascade
add_foreign_key "readouts", "quantities"
add_foreign_key "readouts", "units"
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