- Added new helper function :func:`.was_deleted`, returns True

if the given object was the subject of a :meth:`.Session.delete`
operation.
- An object that's deleted from a session will be de-associated with
that session fully after the transaction is committed, that is
the :func:`.object_session` function will return None.
[ticket:2658]

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/sqlalchemy/orm/session.py b/lib/sqlalchemy/orm/session.py
index 00c6d4227..2915fd4c8 100644
--- a/lib/sqlalchemy/orm/session.py
+++ b/lib/sqlalchemy/orm/session.py
@@ -255,6 +255,10 @@ class SessionTransaction(object):
         if not self.nested and self.session.expire_on_commit:
             for s in self.session.identity_map.all_states():
                 s._expire(s.dict, self.session.identity_map._modified)
+            for s in self._deleted:
+                s.session_id = None
+            self._deleted.clear()
+
 
     def _connection_for_bind(self, bind):
         self._assert_is_active()