    # File lib/active_record/nested_attributes.rb, line 226
          def accepts_nested_attributes_for(*attr_names)
            options = { :allow_destroy => false, :update_only => false }
            options.update(attr_names.extract_options!)
            options.assert_valid_keys(:allow_destroy, :reject_if, :limit, :update_only)
            options[:reject_if] = REJECT_ALL_BLANK_PROC if options[:reject_if] == :all_blank

            attr_names.each do |association_name|
              if reflection = reflect_on_association(association_name)
                reflection.options[:autosave] = true
                add_autosave_association_callbacks(reflection)
                nested_attributes_options[association_name.to_sym] = options
                type = (reflection.collection? ? :collection : :one_to_one)

                # def pirate_attributes=(attributes)
                #   assign_nested_attributes_for_one_to_one_association(:pirate, attributes)
                # end
                class_eval "def \#{association_name}_attributes=(attributes)\nassign_nested_attributes_for_\#{type}_association(:\#{association_name}, attributes)\nend\n", __FILE__, __LINE__ + 1
              else
                raise ArgumentError, "No association found for name `#{association_name}'. Has it been defined yet?"
              end
            end
          end