Method has_parent

lib/sqlalchemy/orm/instrumentation.py:554–558

TODO

(
        self, state: InstanceState[_O], key: str, optimistic: bool = False
    )

        return hasattr(instance, self.STATE_ATTR)

    def has_parent(
        self, state: InstanceState[_O], key: str, optimistic: bool = False
    ) -> bool:
        """TODO"""
        return self.get_impl(key).hasparent(state, optimistic=optimistic)

    def __bool__(self) -> bool:
        """All ClassManagers are non-zero regardless of attribute state."""