determines if the given value equates to a null value for the given column type
(self, val)
| 308 | return '"{0}"'.format(self.db_field_name) |
| 309 | |
| 310 | def _val_is_null(self, val): |
| 311 | """ determines if the given value equates to a null value for the given column type """ |
| 312 | return val is None |
| 313 | |
| 314 | @property |
| 315 | def sub_types(self): |