code: def add(self, *args, **kwargs):
          
  
          check_uniqueness = kwargs.pop('check_uniqueness', False)
          args = self.prepare_args(args)
  
          for index in self._indexes:
              index.add(*args, check_uniqueness=check_uniqueness and index.handle_uniqueness, **kwargs)
              if check_uniqueness and index.handle_uniqueness:
                  check_uniqueness = False
docs: Add the instance tied to the field to all the indexes
  
          For the parameters, seen BaseIndex.add