advanced image management

apps/api/db/migrate/20260505000010_create_software_images.rb

@@ -0,0 +1,18 @@
+class CreateSoftwareImages < ActiveRecord::Migration[8.0]
+  def change
+    create_table :software_images do |t|
+      t.bigint  :software_id, null: false, unsigned: true
+      t.bigint  :image_id,    null: false
+      t.boolean :is_default,  null: false, default: false
+      t.integer :position,    null: false, default: 0
+
+      t.timestamps
+    end
+
+    add_index :software_images, [:software_id, :image_id], unique: true
+    add_index :software_images, [:software_id, :position]
+
+    add_foreign_key :software_images, :softwares
+    add_foreign_key :software_images, :images
+  end
+end

apps/api/db/migrate/20260505000011_migrate_and_remove_software_image_id.rb

@@ -0,0 +1,24 @@
+class MigrateAndRemoveSoftwareImageId < ActiveRecord::Migration[8.0]
+  def up
+    Software.unscoped.where.not(image_id: nil).find_each do |sw|
+      SoftwareImage.create!(
+        software_id: sw.id,
+        image_id:    sw.image_id,
+        is_default:  true,
+        position:    0
+      )
+    end
+
+    remove_foreign_key :softwares, :images
+    remove_column :softwares, :image_id
+  end
+
+  def down
+    add_column :softwares, :image_id, :bigint
+    add_foreign_key :softwares, :images
+
+    SoftwareImage.where(is_default: true).find_each do |si|
+      Software.unscoped.where(id: si.software_id).update_all(image_id: si.image_id)
+    end
+  end
+end