Move migration defaults to ActiveRecord migration strategy

Remove redundant defaults

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, :confirmation_token, unique: true
+    add_index :users, :reset_password_token
+    add_index :users, :confirmation_token
     # add_index :users, :unlock_token, unique: true
   end
 end

db/migrate/20230602185352_create_units.rb

@@ -1,4 +1,4 @@
-class CreateUnits < ActiveRecord::Migration[7.0]
+class CreateUnits < ActiveRecord::Migration[8.1]
   def change
     create_table :units do |t|
       t.references :user, foreign_key: {on_delete: :cascade}
@@ -7,8 +7,8 @@ class CreateUnits < ActiveRecord::Migration[7.0]
       t.decimal :multiplier, null: false, precision: 30, scale: 15, 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]
   end
 end

db/migrate/20250104194343_create_quantities.rb

@@ -1,4 +1,4 @@
-class CreateQuantities < ActiveRecord::Migration[7.2]
+class CreateQuantities < ActiveRecord::Migration[8.1]
   def change
     create_table :quantities do |t|
       t.references :user, foreign_key: {on_delete: :cascade}
@@ -6,12 +6,12 @@ class CreateQuantities < ActiveRecord::Migration[7.2]
       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]
   end
 end

db/migrate/20250121230456_create_readouts.rb

@@ -1,4 +1,4 @@
-class CreateReadouts < ActiveRecord::Migration[7.2]
+class CreateReadouts < ActiveRecord::Migration[8.1]
   def change
     create_table :readouts do |t|
       t.references :user, null: false, foreign_key: {on_delete: :cascade}
@@ -10,8 +10,7 @@ class CreateReadouts < ActiveRecord::Migration[7.2]
       #t.references :collector, foreign_key: true
       #t.references :device, foreign_key: true
 
-      t.timestamps null: false
+      t.timestamps
     end
-    add_index :readouts, [:quantity_id, :created_at], unique: true
   end
 end