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 deserialize(self, value):
        value = decode(value)
        validators.validate_choice(value.lower(), self.levels.keys())
        return self.levels.get(value.lower())