def children_params
      klass_id = self.class.name.split('::').last.downcase + '_id'
      route_params.merge(klass_id.to_sym => id).reject { |k, v| k == :id }
    end
def children_params
      klass_id = self.class.name.split('::').last.downcase + '_id'
      route_params.merge(klass_id.to_sym => id).reject { |k, v| k == :id }
    end
Attributes that should be passed down the object hierarchy - e.g. a Question should have a survey_id
 Also used for loading member objects, e.g. loading Options for a given Question.