(self, op, value)
| 1549 | return SON((("_cls", document._class_name), ("_ref", ref))) |
| 1550 | |
| 1551 | def prepare_query_value(self, op, value): |
| 1552 | if value is None: |
| 1553 | return None |
| 1554 | |
| 1555 | return self.to_mongo(value) |
| 1556 | |
| 1557 | |
| 1558 | class BinaryField(BaseField): |