Method _get_default_pk_class

django/db/models/options.py:261–290

(self)

        return new_objs

    def _get_default_pk_class(self):
        pk_class_path = getattr(
            self.app_config,
            "default_auto_field",
            settings.DEFAULT_AUTO_FIELD,
        )
        if self.app_config and self.app_config._is_default_auto_field_overridden:
            app_config_class = type(self.app_config)
            source = (
                f"{app_config_class.__module__}."
                f"{app_config_class.__qualname__}.default_auto_field"
            )
        else:
            source = "DEFAULT_AUTO_FIELD"
        if not pk_class_path:
            raise ImproperlyConfigured(f"{source} must not be empty.")
        try:
            pk_class = import_string(pk_class_path)
        except ImportError as e:
            msg = (
                f"{source} refers to the module '{pk_class_path}' that could "
                f"not be imported."
            )
            raise ImproperlyConfigured(msg) from e
        if not issubclass(pk_class, AutoField):
            raise ValueError(
                f"Primary key '{pk_class_path}' referred by {source} must "
                f"subclass AutoField."
            )
        return pk_class

    def _prepare(self, model):
        if self.order_with_respect_to: