class CmAdmin::ResourceController

def custom_controller_action(action_name, params)
  @current_action = CmAdmin::Models::Action.find_by(@model, name: action_name.to_s)
  return unless @current_action
  @ar_object = @model.ar_model.name.classify.constantize.find(params[:id])
  return @ar_object unless @current_action.child_records
  child_records = @ar_object.send(@current_action.child_records)
  @reflection = @model.ar_model.reflect_on_association(@current_action.child_records)
  @associated_model = if @reflection.klass.column_names.include?('type')
                        CmAdmin::Model.find_by(name: @reflection.plural_name.classify)
                      else
                        CmAdmin::Model.find_by(name: @reflection.klass.name)
                      end
  @associated_ar_object = if child_records.is_a? ActiveRecord::Relation
                            filter_by(params, child_records, @associated_model.filter_params(params))
                          else
                            child_records
                          end
  return @ar_object, @associated_model, @associated_ar_object
end