Flask_MongoEngine在Webfaction上不起作用吗？

Question

我目前正在尝试将使用Python Flask框架构建的网站部署到Webfaction 。 我已经部署了MongoDB，可以从MongoDB交互式解释器成功连接到它：

[celli@web498 ~]$ mongo localhost:18209/admin
MongoDB shell version: 3.0.2
connecting to: localhost:18209/admin
> db.auth("awesomeusername", "anawesomepassword")
1

启动网站时，它可以使用我的flask config.py文件中的以下凭据成功连接：

MONGODB_SETTINGS = {'db'：'tc'，'port'：18209，
'username'：'awesomeusername'，'password'：'anawesomepassword'，}

但是，当我访问进行查询的页面时，出现以下错误。 这段代码在另一台服务器上运行良好，因此错误出在我的MongoDB实例的设置或与其连接中。 我也感到奇怪的是，建立连接的工作正常，但是查询它会创建此Authentication failed错误。

知道我该如何解决吗？ 欢迎所有提示！

File "/home/celli/webapps/tc/venv/lib/python2.7/site-packages/flask_login.py", line 758, in decorated_view
 return func(*args, **kwargs)
File "/home/celli/webapps/tc/tc/app/views/webviews.py", line 220, in myTickets
 userDocs = UserDocument.objects(id__in=[ticket.doc_id for ticket in userTickets])
File "/home/celli/webapps/tc/venv/lib/python2.7/site-packages/mongoengine/queryset/manager.py", line 37, in __get__
 queryset = queryset_class(owner, owner._get_collection())
File "/home/celli/webapps/tc/venv/lib/python2.7/site-packages/mongoengine/document.py", line 168, in _get_collection
 db = cls._get_db()
File "/home/celli/webapps/tc/venv/lib/python2.7/site-packages/mongoengine/document.py", line 162, in _get_db
 return get_db(cls._meta.get("db_alias", DEFAULT_CONNECTION_NAME))
File "/home/celli/webapps/tc/venv/lib/python2.7/site-packages/mongoengine/connection.py", line 143, in get_db
 source=conn_settings['authentication_source'])
File "/home/celli/webapps/tc/venv/lib/python2.7/site-packages/pymongo/database.py", line 978, in authenticate
 self.connection._cache_credentials(self.name, credentials)
File "/home/celli/webapps/tc/venv/lib/python2.7/site-packages/pymongo/mongo_client.py", line 467, in _cache_credentials
 auth.authenticate(credentials, sock_info, self.__simple_command)
File "/home/celli/webapps/tc/venv/lib/python2.7/site-packages/pymongo/auth.py", line 475, in authenticate
 auth_func(credentials[1:], sock_info, cmd_func)
File "/home/celli/webapps/tc/venv/lib/python2.7/site-packages/pymongo/auth.py", line 450, in _authenticate_default
 return _authenticate_scram_sha1(credentials, sock_info, cmd_func)
File "/home/celli/webapps/tc/venv/lib/python2.7/site-packages/pymongo/auth.py", line 238, in _authenticate_scram_sha1
 sasl_start, sasl_continue)
File "/home/celli/webapps/tc/venv/lib/python2.7/site-packages/pymongo/auth.py", line 185, in _scram_sha1_conversation
 res, _ = cmd_func(sock_info, source, sasl_start)
File "/home/celli/webapps/tc/venv/lib/python2.7/site-packages/pymongo/mongo_client.py", line 703, in __simple_command
 helpers._check_command_response(response, None, msg)
File "/home/celli/webapps/tc/venv/lib/python2.7/site-packages/pymongo/helpers.py", line 182, in _check_command_response
 raise OperationFailure(msg % errmsg, code, response)
OperationFailure: command SON([('saslStart', 1), ('mechanism', 'SCRAM-SHA-1'), ('autoAuthorize', 1), ('payload', Binary('n,,n=awesomeusername,r=NjAxNTEwMjc5MzAy', 0))]) on namespace tc.$cmd failed: Authentication failed.

Answer 1

MongoDB的用户是基于数据库的 。 在您的示例中，您显示您已连接到admin数据库，但错误消息只是告诉您您的用户正在尝试通过tc数据库进行身份验证。 您的用户可能在tc上没有任何作用。

（另一种可能性是tc不是您要连接的数据库；您需要在连接参数/字符串中指定正确的数据库名称）。