starwels/post_presenter.rb

## post_presenter.rb
class PostPresenter
  def index
    posts = Post.includes(:comments).order(id: :asc).as_json(include: [:comments])
    posts.map { |post| post['status'] = post['created_at'] < post['updated_at'] ? '(edited)' : '(first version)' }
  end
end
	class PostPresenter
	def index
	posts = Post.includes(:comments).order(id: :asc).as_json(include: [:comments])
	posts.map { \|post\| post['status'] = post['created_at'] < post['updated_at'] ? '(edited)' : '(first version)' }
	end
	end