ColumnClause needed optional foreign_key parameter

diff --git a/lib/sqlalchemy/sql.py b/lib/sqlalchemy/sql.py
index ade96ae4ba66855621ad8fb23e6e464f6b07333f..782eef02ff3133546150e26dc7c6ec173ae3e69e 100644 (file)
--- a/lib/sqlalchemy/sql.py
+++ b/lib/sqlalchemy/sql.py
@@ -465,7 +465,8 @@ class Selectable(ClauseElement):
 
 class ColumnElement(Selectable, CompareMixin):
     """represents a column element within the list of a Selectable's columns."""
-    primary_key = property(lambda s:getattr(self, '_primary_key', False))
+    primary_key = property(lambda self:getattr(self, '_primary_key', False))
+    foreign_key = property(lambda self:getattr(self, '_foreign_key', False))
     original = property(lambda self:getattr(self, '_original', self))
     columns = property(lambda self:[self])