Dynamic Fields for active_model_serializers

dynamice_active_model_serializers.rb

class YourDynamicModelSerializer < ActiveModel::Serializer

  attributes :_id, :name

  def _id
    object._id.to_s
  end

  def attributes
    fields = object.attributes
    super.each do |attr_name, attr_val|
      fields[attr_name] = attr_val
    end
    fields
  end

end