diff options
Diffstat (limited to 'lib/sqlalchemy')
| -rw-r--r-- | lib/sqlalchemy/orm/properties.py | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/sqlalchemy/orm/properties.py b/lib/sqlalchemy/orm/properties.py index fd64e7b81..79676642c 100644 --- a/lib/sqlalchemy/orm/properties.py +++ b/lib/sqlalchemy/orm/properties.py @@ -1064,7 +1064,8 @@ class RelationshipProperty(StrategizedProperty): if self.cascade.delete_orphan and not self.single_parent \ and (self.direction is MANYTOMANY or self.direction is MANYTOONE): - util.warn('On %s, delete-orphan cascade is not supported ' + raise sa_exc.ArgumentError( + 'On %s, delete-orphan cascade is not supported ' 'on a many-to-many or many-to-one relationship ' 'when single_parent is not set. Set ' 'single_parent=True on the relationship().' |