diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/sqlalchemy/orm/properties.py | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/sqlalchemy/orm/properties.py b/lib/sqlalchemy/orm/properties.py index 9c2268e01..3ae0bfbf5 100644 --- a/lib/sqlalchemy/orm/properties.py +++ b/lib/sqlalchemy/orm/properties.py @@ -703,6 +703,10 @@ class RelationProperty(StrategizedProperty): raise sa_exc.ArgumentError("reverse_property %r on relation %s references " "relation %s, which does not reference mapper %s" % (key, self, other, self.parent)) + if self.direction in (ONETOMANY, MANYTOONE) and self.direction == other.direction: + raise sa_exc.ArgumentError("%s and back-reference %s are both of the same direction %r." + " Did you mean to set remote_side on the many-to-one side ?" % (self, other, self.direction)) + def do_init(self): self._get_target() self._process_dependent_arguments() |