orbit-4-1/app/models/object_auth.rb

class ObjectAuth  < PrototypeAuth

  belongs_to :obj_authable, polymorphic: true
  # > - Something.find_with_auth(query)
  # > - or Something.find(query).auth
  def auth_obj
    class_obj = eval(self.obj_authable_type)
    class_obj.find self.obj_authable_id
  end

end