Question

我尝试运行时收到此错误

python manage.py runserver

或命令行中的任何其他python manage.py *命令。

但是当我尝试使用python manage.py shell时，它没有错误地连接并从数据库获取数据。

错误：

 Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x7fa03b7386a8>
Traceback (most recent call last):
  File "/home/tornike/apps/env/lib/python3.6/site-packages/django/utils/autoreload.py", line 227, in wrapper
    fn(*args, **kwargs)
  File "/home/tornike/apps/env/lib/python3.6/site-packages/django/core/management/commands/runserver.py", line 125, in inner_run
    self.check(display_num_errors=True)
  File "/home/tornike/apps/env/lib/python3.6/site-packages/django/core/management/base.py", line 359, in check
    include_deployment_checks=include_deployment_checks,
  File "/home/tornike/apps/env/lib/python3.6/site-packages/django/core/management/base.py", line 346, in _run_checks
    return checks.run_checks(**kwargs)
  File "/home/tornike/apps/env/lib/python3.6/site-packages/django/core/checks/registry.py", line 81, in run_checks
    new_errors = check(app_configs=app_configs)
  File "/home/tornike/apps/env/lib/python3.6/site-packages/debug_toolbar/apps.py", line 25, in check_middleware
    for i, middleware in enumerate(settings.MIDDLEWARE):
TypeError: 'NoneType' object is not iterable




MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.locale.LocaleMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'django.middleware.security.SecurityMiddleware'
)

Answer 1

该错误清除表明settings.MIDDLEWARE为None，但您已发布MIDDLEWARE_CLASSES，该类已从Django 2.0中删除。如果django的版本> = 2.0，请确保在settings.py中使用MIDDLEWARE。

对于我来说，枚举（settings.MIDDLEWARE）中的中间件：TypeError：'NoneType'对象不可迭代

1 个答案: