Add Quantities table

db/migrate/20230602185352_create_units.rb

@@ -5,7 +5,7 @@ class CreateUnits < ActiveRecord::Migration[7.0]
       t.string :symbol, null: false, limit: 15
       t.text :description
       t.decimal :multiplier, null: false, precision: 30, scale: 15, default: 1.0
-      t.references :base
+      t.references :base, foreign_key: {to_table: :units}
 
       t.timestamps null: false
     end

db/migrate/20250104194343_create_quantities.rb

@@ -0,0 +1,13 @@
+class CreateQuantities < ActiveRecord::Migration[7.2]
+  def change
+    create_table :quantities do |t|
+      t.references :user, foreign_key: true
+      t.integer :domain
+      t.string :name, null: false, limit: 31
+      t.text :description
+      t.references :parent, foreign_key: {to_table: :quantities}
+
+      t.timestamps null: false
+    end
+  end
+end