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-rw-r--r--lib/sqlalchemy/orm/session.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/sqlalchemy/orm/session.py b/lib/sqlalchemy/orm/session.py
index f3ad2349c..4619027e5 100644
--- a/lib/sqlalchemy/orm/session.py
+++ b/lib/sqlalchemy/orm/session.py
@@ -305,6 +305,7 @@ class SessionTransaction(object):
self._deleted.clear()
elif self.nested:
self._parent._new.update(self._new)
+ self._parent._dirty.update(self._dirty)
self._parent._deleted.update(self._deleted)
self._parent._key_switches.update(self._key_switches)