def insert(self, doc, synced=False):
        doc.id = self.get_next_id()
        doc.synced = synced
        try:
            self.db.docs.insert(doc)
        except Exception as e:
            raise DatabaseException(e)
        return doc
def tearDown(self):
        if hasattr(self, "rng_state"):
            torch.set_rng_state(self.rng_state)