Python SQLAlchemy挂着一个；萨瓦宁：此收藏已作废；

我已经遇到这个问题好几天了，仍然不知道为什么在运行单元测试时SQLAlchemy总是挂在这个消息上

/usr/local/lib/python3.4/site packages/sqlalchemy/orm/collections.py:722:SAWarning:此集合已无效。 self.\u warn\u invalidated（）

当我添加了几行代码来保存一个新的模型实例（比如模型MC的实例）时，就会发生这种情况，该实例引用了另一个新提交的模型实例（比如模型M的实例，M.id=MC.M_id）。不幸的是，大多数代码都是私有的，所以我不能像我希望的那样分享太多的参考代码

当我使用

ctrl+c

摆脱挂起状态时，堆栈跟踪如下所示：

Aborted!
    results = run_tests(test_names)
  File "tests/run.py", line 14, in run_tests
    return testRunner.run(tests)
  File "/usr/local/lib/python3.4/unittest/runner.py", line 168, in run
    test(result)
  File "/usr/local/lib/python3.4/unittest/suite.py", line 87, in __call__
    return self.run(*args, **kwds)
  File "/usr/local/lib/python3.4/unittest/suite.py", line 125, in run
    test(result)
  File "/usr/local/lib/python3.4/unittest/case.py", line 625, in __call__
    return self.run(*args, **kwds)
  File "/usr/local/lib/python3.4/unittest/case.py", line 577, in run
    testMethod()
  File "/api/tests/test_messaging.py", line 292, in test_create_message
    self._create_message_credit(self.member)
  File "/api/tests/test_messaging.py", line 86, in _create_message_credit
    msg_credits += _create_credits(diffs)
  File "/usr/local/lib/python3.4/site-packages/sqlalchemy/orm/collections.py", line 1164, in __iadd__
    self.append(value)
  File "/usr/local/lib/python3.4/site-packages/sqlalchemy/orm/collections.py", line 1057, in append
    item = __set(self, item, _sa_initiator)
  File "/usr/local/lib/python3.4/site-packages/sqlalchemy/orm/collections.py", line 1029, in __set
    item = executor.fire_append_event(item, _sa_initiator)
  File "/usr/local/lib/python3.4/site-packages/sqlalchemy/orm/collections.py", line 726, in fire_append_event
    item, initiator)
  File "/usr/local/lib/python3.4/site-packages/sqlalchemy/orm/attributes.py", line 929, in fire_append_event
    value = fn(state, value, initiator or self._append_token)
  File "/usr/local/lib/python3.4/site-packages/sqlalchemy/orm/unitofwork.py", line 44, in append
    not sess._contains_state(item_state):
  File "/usr/local/lib/python3.4/site-packages/sqlalchemy/orm/session.py", line 1961, in _contains_state
    return state in self._new or self.identity_map.contains_state(state)
  File "/usr/local/lib/python3.4/site-packages/sqlalchemy/orm/identity.py", line 98, in contains_state
    return dict.get(self, state.key) is state
KeyboardInterrupt

---

我正在运行

python3.4.3

、

flasksqlalchemy 2.0

和

SQLAlchemy 0.9.8

您确定这不是原始项目bug tracker中的bug报告材料吗？@silpol感谢您的建议。它原来是由SQLAlchemy之外的一个bug引起的。然而，我仍然想理解为什么它“挂”在上面。因此，我将花更多的时间创建一个样本测试，我可以复制挂起行为，然后提交。