小编pri*_*mka的帖子

我有一个基于异步 Tornado 和 mongoDB 的 API。它工作正常，除了一个处理程序：

@gen.coroutine
def get(self, *args, **kwargs):
    """
    Gets tracking lib
    """
    data = self._get_request_data()
    self._serialize_request_data(AuthValidator, data)

    tags = yield self.motor.tags.find_one({"client_id": data["client_id"]})
    raise Return(self.write(tags))

当请求到来时，tornado 返回带有以下堆栈跟踪的 HTTP 500：

response: Traceback (most recent call last):
  File "/Users/artemkorhov/Projects/cartreminder/env/lib/python2.7/site-packages/tornado/web.py", line 1334, in _execute
result = yield result
  File "/Users/artemkorhov/Projects/cartreminder/env/lib/python2.7/site-packages/tornado/gen.py", line 617, in run
value = future.result()
  File "/Users/artemkorhov/Projects/cartreminder/env/lib/python2.7/site-packages/tornado/concurrent.py", line 109, in result
raise_exc_info(self._exc_info)
  File "/Users/artemkorhov/Projects/cartreminder/env/lib/python2.7/site-packages/tornado/gen.py", line 620, in run
yielded = self.gen.throw(*sys.exc_info())
  File "/Users/artemkorhov/Projects/cartreminder/cartreminder_app/tracking_api/api_handlers/endpoints.py", line 35, in get
tags …