Method _with_polymorphic_selectable

lib/sqlalchemy/orm/mapper.py:2697–2707

(self)

    @HasMemoized_ro_memoized_attribute
    def _with_polymorphic_selectable(self) -> FromClause:
        if not self.with_polymorphic:
            return self.persist_selectable

        spec, selectable = self.with_polymorphic
        if selectable is not None:
            return selectable
        else:
            return self._selectable_from_mappers(
                self._mappers_from_spec(spec, selectable), False
            )

    with_polymorphic_mappers = _with_polymorphic_mappers
    """The list of :class:`_orm.Mapper` objects included in the