method_missing

# File activerecord/lib/active_record/base.rb, line 988
        def method_missing(method_id, *arguments, &block)
          if match = DynamicFinderMatch.match(method_id)
            attribute_names = match.attribute_names
            super unless all_attributes_exists?(attribute_names)
            if match.finder?
              options = arguments.extract_options!
              relation = options.any? ? construct_finder_arel(options, current_scoped_methods) : scoped
              relation.send :find_by_attributes, match, attribute_names, *arguments
            elsif match.instantiator?
              scoped.send :find_or_instantiator_by_attributes, match, attribute_names, *arguments, &block
            end
          elsif match = DynamicScopeMatch.match(method_id)
            attribute_names = match.attribute_names
            super unless all_attributes_exists?(attribute_names)
            if match.scope?
              self.class_eval "def self.\#{method_id}(*args)                        # def self.scoped_by_user_name_and_password(*args)\noptions = args.extract_options!                   #   options = args.extract_options!\nattributes = construct_attributes_from_arguments( #   attributes = construct_attributes_from_arguments(\n[:\#{attribute_names.join(',:')}], args          #     [:user_name, :password], args\n)                                                 #   )\n#\nscoped(:conditions => attributes)                 #   scoped(:conditions => attributes)\nend                                                 # end\n", __FILE__, __LINE__ + 1
              send(method_id, *arguments)
            end
          else
            super
          end
        end