- restore declarative support for "composite"

- add an example of mutable scalars with events

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/sqlalchemy/orm/attributes.py b/lib/sqlalchemy/orm/attributes.py
index 40a69d96a..ac6a498c7 100644
--- a/lib/sqlalchemy/orm/attributes.py
+++ b/lib/sqlalchemy/orm/attributes.py
@@ -149,7 +149,8 @@ def create_proxied_attribute(descriptor):
     class Proxy(QueryableAttribute):
         """A combination of InsturmentedAttribute and a regular descriptor."""
 
-        def __init__(self, key, descriptor, comparator, adapter=None):
+        def __init__(self, class_, key, descriptor, comparator, adapter=None):
+            self.class_ = class_
             self.key = key
             self.descriptor = descriptor
             self._comparator = comparator