    # File lib/active_record/locking/optimistic.rb, line 44
          def attributes_from_column_definition_with_lock
            result = attributes_from_column_definition_without_lock

            # If the locking column has no default value set,
            # start the lock version at zero.  Note we can't use
            # locking_enabled? at this point as @attributes may
            # not have been initialized yet

            if lock_optimistically && result.include?(self.class.locking_column)
              result[self.class.locking_column] ||= 0
            end

            return result
          end