docs: def get_relation_fields_from_model(model_class):
      """ Get related fields (m2m, FK, and reverse FK) """
      relation_fields = []
      all_fields_names = _get_all_field_names(model_class)
      for field_name in all_fields_names:
          field, model, direct, m2m = _get_field_by_name(model_class, field_name)
          # get_all_field_names will return the same field
          # both with and without _id. Ignore the duplicate.
          if field_name[-3:] == '_id' and field_name[:-3] in all_fields_names:
              continue
          if m2m or not direct or _get_remote_field(field):
              field.field_name_override = field_name
              relation_fields += [field]
      return relation_fields