code: def rebuild_indexes(self, chunk_size=1000, aggressive_clear=False, index_class=None):
          
          assert self.indexable, "Field not indexable"
          assert self.attached_to_model, \
              '`rebuild_indexes` can only be called on a field attached to the model'
  
          for index in self._indexes:
              if index_class and not isinstance(index, index_class):
                  continue
              index.rebuild(chunk_size=chunk_size, aggressive_clear=aggressive_clear)
docs: Rebuild all indexes tied to this field
  
          Parameters
          ----------
          chunk_size: int
              Default to 1000, it's the number of instances to load at once.
          aggressive_clear: bool
              Will be passed to the `aggressive` argument of the `clear_indexes` method.
              If `False`, all values will be normally deindexed. If `True`, the work
              will be done at low level, scanning for keys that may match the ones used by the indexes
          index_class: type
              Allow to build only index(es) for this index class instead of all indexes.
  
          Raises
          ------
          AssertionError
              If called from an instance field. It must be called from the model field
              Also raised if the field is not indexable
  
          Examples
          --------
  
          >>> MyModel.get_field('myfield').rebuild_indexes()
          >>> MyModel.get_field('myfield').clear_indexes(index_class=MyIndex)