Method select_related

ormar/queryset/queryset.py:376–398

Allows to prefetch related models during the same query. **With `select_related` always only one query is run against the database**, meaning that one (sometimes complicated) join is generated and later nested models are processed in python. To fetch relate

(self, related: Union[list, str, FieldAccessor])

        return self.filter(_exclude=True, *args, **kwargs)

    def select_related(self, related: Union[list, str, FieldAccessor]) -> "QuerySet[T]":
        """
        Allows to prefetch related models during the same query.

        **With `select_related` always only one query is run against the database**,
        meaning that one (sometimes complicated) join is generated and later nested
        models are processed in python.

        To fetch related model use `ForeignKey` names.

        To chain related `Models` relation use double underscores between names.

        :param related: list of relation field names, can be linked by '__' to nest
        :type related: Union[list, str]
        :return: QuerySet
        :rtype: QuerySet
        """
        if not isinstance(related, list):
            related = [related]
        related = cast(list, extract_access_chains(related))

        related = sorted(list(set(list(self._select_related) + related)))
        return self.rebuild_self(select_related=related)

    def select_all(self, follow: bool = False) -> "QuerySet[T]":
        """