Method _detach

lib/sqlalchemy/orm/state.py:505–509

(self, session: Optional[Session] = None)

            state._strong_obj = None

    def _detach(self, session: Optional[Session] = None) -> None:
        if session:
            InstanceState._detach_states([self], session)
        else:
            self.session_id = self._strong_obj = None

    def _dispose(self) -> None:
        # used by the test suite, apparently