Add virtual attribute to json output

Question

Let\'s say I have an app that handles a TODO list. The list has finished and unfinished items. Now I want to add two virtual attributes to the list object; the count of fini

Answer 1

This will do, without having to do some ugly overridings. If you got a model List for example, you can put this in your controller:

  render json: list.attributes.merge({
                                       finished_items: list.finished_items,
                                       unfinished_items: list.unfinished_items
                                     })