Rails serializer isn't called on Mongoid embedded class

Question

I have two mongoid models, let's call them Model and ModelChild. This is relation in Model:

embeds_many :readings, class_name: 'ModelChild', inverse_of: :model

And this is relation in model_child:

embedded_in :model, class_name: 'Model', inverse_of: :readings

The problem is that ModelSerializer is called, but ModelChildSerializer isn't. Am I doing something wrong or is this by design? If it's by design, how can I make it call ModelChildSerializer.

EDIT:

Controller's rendering call:

render json: obj, serializer: ObjSerializer

And code in ObjSerializer:

  def attributes
    data = super
    data[:data] = ActiveModel::ArraySerializer.new(data[:data])
    data
  end

Answer 1

ActiveModel Serialization is not supported for embedded documents...if you want a workaround check this out http://discuss.emberjs.com/t/extend-ds-activemodelserializer-support-for-embedded-objects-belongsto-relationship-using-has-one/3392