# File lib/active_record/base.rb, line 1669
      def attributes=(new_attributes)
        return if new_attributes.nil?
        attributes = new_attributes.dup
        attributes.stringify_keys!

        multi_parameter_attributes = []
        remove_attributes_protected_from_mass_assignment(attributes).each do |k, v|
          k.include?("(") ? multi_parameter_attributes << [ k, v ] : send(k + "=", v)
        end

        assign_multiparameter_attributes(multi_parameter_attributes)
      end