Method append_with_event

lib/sqlalchemy/orm/collections.py:497–502

Add an entity to the collection, firing mutation events.

(
        self, item: Any, initiator: Optional[AttributeEventToken] = None
    )

        return self._data()._sa_appender

    def append_with_event(
        self, item: Any, initiator: Optional[AttributeEventToken] = None
    ) -> None:
        """Add an entity to the collection, firing mutation events."""

        self._data()._sa_appender(item, _sa_initiator=initiator)

    def _set_empty(self, user_data):
        assert (