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-rw-r--r--lib/sqlalchemy/orm/session.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/sqlalchemy/orm/session.py b/lib/sqlalchemy/orm/session.py
index b9f170733..380bc8622 100644
--- a/lib/sqlalchemy/orm/session.py
+++ b/lib/sqlalchemy/orm/session.py
@@ -1283,6 +1283,8 @@ class Session(object):
state.session_id, self.hash_key))
if state.session_id != self.hash_key:
state.session_id = self.hash_key
+ if self.extension is not None:
+ self.extension.after_attach(self, state.obj())
def __contains__(self, instance):
"""Return True if the instance is associated with this session.