Django错误noneType

Question

我不知道为什么会收到此错误。这是什么意思？

我将此站点放入虚拟机并在Web服务器平台内运行。这可能是因为网站没有直接托管吗？

[26/Jan/2018 16:28:52] "GET /static/css/custom.css HTTP/1.1" 200 7346
Traceback (most recent call last):
  File "/usr/lib/python3.4/wsgiref/handlers.py", line 137, in run
    self.result = application(self.environ, self.start_response)
  File "/usr/local/lib/python3.4/dist-packages/django/contrib/staticfiles/handlers.py", line 67, in __call__
    return super().__call__(environ, start_response)
  File "/usr/local/lib/python3.4/dist-packages/django/core/handlers/wsgi.py", line 146, in __call__
    response = self.get_response(request)
  File "/usr/local/lib/python3.4/dist-packages/django/contrib/staticfiles/handlers.py", line 62, in get_response
    return super().get_response(request)
  File "/usr/local/lib/python3.4/dist-packages/django/core/handlers/base.py", line 81, in get_response
    response = self._middleware_chain(request)
TypeError: 'NoneType' object is not callable
[26/Jan/2018 16:28:52] "GET /static/css/bootstrap.min.css.map HTTP/1.1" 500 59
Traceback (most recent call last):
  File "/usr/lib/python3.4/wsgiref/handlers.py", line 137, in run
    self.result = application(self.environ, self.start_response)
  File "/usr/local/lib/python3.4/dist-packages/django/contrib/staticfiles/handlers.py", line 67, in __call__
    return super().__call__(environ, start_response)
  File "/usr/local/lib/python3.4/dist-packages/django/core/handlers/wsgi.py", line 146, in __call__
    response = self.get_response(request)
  File "/usr/local/lib/python3.4/dist-packages/django/contrib/staticfiles/handlers.py", line 62, in get_response
    return super().get_response(request)
  File "/usr/local/lib/python3.4/dist-packages/django/core/handlers/base.py", line 81, in get_response
    response = self._middleware_chain(request)
TypeError: 'NoneType' object is not callable

Answer 1

某处，你有一个未正确设置的变量，而django正试图调用它。

您可以像这样重现错误：

>>> a = None
>>> a()
Traceback (most recent call last):
  File "main.py", line 4, in <module>
    a()
TypeError: 'NoneType' object is not callable

至于为什么它会在您的应用程序中发生，如果没有显示任何代码，这很难分辨。如果您不确定错误的位置，我建议您尝试撤消最近的更改，直到它再次开始工作。

在黑暗中快速刺杀是您的某些中间件未正确配置。