update_with_timestamps

# File activerecord/lib/active_record/timestamp.rb, line 56
      def update_with_timestamps(*args) #:nodoc:
        if record_timestamps && (!partial_updates? || changed?)
          current_time = current_time_from_proper_timezone

          write_attribute('updated_at', current_time) if respond_to?(:updated_at)
          write_attribute('updated_on', current_time) if respond_to?(:updated_on)
        end

        update_without_timestamps(*args)
      end