add template preferences

db/migrate/20240416170023_add_preferences_to_templates.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+class AddPreferencesToTemplates < ActiveRecord::Migration[7.1]
+  class MigrationTemplate < ApplicationRecord
+    self.table_name = 'templates'
+  end
+
+  def change
+    add_column :templates, :preferences, :text
+
+    MigrationTemplate.where(preferences: nil).update_all(preferences: '{}')
+
+    change_column_null :templates, :preferences, false
+  end
+end