traversal.py 文件源码

def create_query(self, id_only=True, tombstones=False):
        from assembl.models import TombstonableMixin
        cls = self._class
        alias = self.class_alias
        if id_only:
            query = self._class.default_db.query(alias.id)
        else:
            query = self._class.default_db.query(alias)
        # TODO: Distinguish tombstone condition from other base_conditions
        if issubclass(cls, TombstonableMixin) and not tombstones:
            query = query.filter(and_(*cls.base_conditions(alias)))
        return query