- fix a typo that was apparently not really impacting anything

diff --git a/lib/sqlalchemy/sql/expression.py b/lib/sqlalchemy/sql/expression.py
index ed561bbeb253c5c2477d1ca7b4f516cde6151bbb..219e3bf14b26a505881267b263591560a30f9eca 100644 (file)
--- a/lib/sqlalchemy/sql/expression.py
+++ b/lib/sqlalchemy/sql/expression.py
@@ -2201,7 +2201,7 @@ class FromClause(Selectable):
     def _reset_exported(self):
         """delete memoized collections when a FromClause is cloned."""
 
-        for attr in '_columns', '_primary_key_foreign_keys', \
+        for attr in '_columns', '_primary_key', '_foreign_keys', \
             'locate_all_froms':
             self.__dict__.pop(attr, None)