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-rw-r--r--lib/sqlalchemy/engine/threadlocal.py8
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/sqlalchemy/engine/threadlocal.py b/lib/sqlalchemy/engine/threadlocal.py
index b6fa14af7..6b222680c 100644
--- a/lib/sqlalchemy/engine/threadlocal.py
+++ b/lib/sqlalchemy/engine/threadlocal.py
@@ -77,16 +77,22 @@ class TLEngine(base.Engine):
self._connections.trans.append(self.contextual_connect().begin())
def prepare(self):
+ if not self._connections.trans:
+ return
self._connections.trans[-1].prepare()
def commit(self):
+ if not self._connections.trans:
+ return
trans = self._connections.trans.pop(-1)
trans.commit()
def rollback(self):
+ if not self._connections.trans:
+ return
trans = self._connections.trans.pop(-1)
trans.rollback()
-
+
def dispose(self):
self._connections = util.threading.local()
super(TLEngine, self).dispose()