Show parent.name instead of parent.id in RABL

Question

I have a RABL file:

collection :@points
attributes :id, :point_type, :name, :coordinates
child :point_pages do
  attributes :point_page_type
  child :point_page_classes do
    attributes :auto_class_id, :show_price   # I need to change this line
  end
end

So, point_page_class belongs_to :point_page and belongs_to :auto_class.

I need to show in attributes of point_page_class not the id of auto_class, but the name of it. But, of course, in point_page_classes table in DB I have only auto_class_id.

I need something like:

child :point_page_classes do
  attributes AutoClass.find(auto_class_id).name, :show_price
end

Thanks for any help!

Answer 1

glue method did it:

collection :@points
attributes :id, :point_type, :name, :coordinates
child :point_pages do
  attributes :point_page_type
  child :point_page_classes do
    attributes :show_price
    glue(:auto_class) do
      attributes :name
    end
  end
end