add source to templates

db/migrate/20230819190316_add_source_to_templates.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class AddSourceToTemplates < ActiveRecord::Migration[7.0]
+  class MigrationTemplate < ApplicationRecord
+    self.table_name = 'templates'
+  end
+
+  def up
+    add_column :templates, :source, :text
+
+    MigrationTemplate.where(source: nil).update_all(source: :native)
+
+    change_column_null :templates, :source, false
+  end
+
+  def down
+    drop_column :templates, :source
+  end
+end