- Restored NotImplementedError on Cls.relation.in_()

[ticket:1140] [ticket:1221]

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/sqlalchemy/orm/properties.py b/lib/sqlalchemy/orm/properties.py
index 2fc72e813..dbc3430a0 100644
--- a/lib/sqlalchemy/orm/properties.py
+++ b/lib/sqlalchemy/orm/properties.py
@@ -359,6 +359,10 @@ class PropertyLoader(StrategizedProperty):
         def of_type(self, cls):
             return PropertyLoader.Comparator(self.prop, self.mapper, cls)
 
+        def in_(self, other):
+            raise NotImplementedError("in_() not yet supported for relations.  For a "
+                    "simple many-to-one, use in_() against the set of foreign key values.")
+            
         def __eq__(self, other):
             if other is None:
                 if self.prop.direction in [ONETOMANY, MANYTOMANY]: