touch (ActiveRecord::Timestamp)

    # File lib/active_record/timestamp.rb, line 27
        def touch(attribute = nil)
          current_time = current_time_from_proper_timezone

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

          save!
        end