(self, obj: Reference)
| 162 | return result |
| 163 | |
| 164 | def delete_reference(self, obj: Reference) -> Reference: |
| 165 | try: |
| 166 | index = self.refs.index(obj) |
| 167 | except ValueError: |
| 168 | raise DatabaseValidationError(f'{obj} is not in the database.') |
| 169 | result = self.refs.pop(index) |
| 170 | self._unset_database(result) |
| 171 | return result |
| 172 | |
| 173 | def delete_enum(self, obj: Enum) -> Enum: |
| 174 | try: |