ERRORS: ?: (admin.E408) 'django.contrib.auth.middleware.AuthenticationMiddleware' must be in MIDDLEW

完整报错如下:

Traceback (most recent call last):
File "/usr/lib/python3.7/threading.py", line 926, in _bootstrap_inner
self.run()
File "/usr/lib/python3.7/threading.py", line 870, in run
self._target(*self._args, **self._kwargs)
File "/home/appleyuchi/.virtualenvs/python3.7/lib/python3.7/site-packages/django/utils/autoreload.py", line 54, in wrapper
fn(*args, **kwargs)
File "/home/appleyuchi/.virtualenvs/python3.7/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 117, in inner_run
self.check(display_num_errors=True)
File "/home/appleyuchi/.virtualenvs/python3.7/lib/python3.7/site-packages/django/core/management/base.py", line 436, in check
raise SystemCheckError(msg)
django.core.management.base.SystemCheckError: SystemCheckError: System check identified some issues:

ERRORS:
?: (admin.E408) 'django.contrib.auth.middleware.AuthenticationMiddleware' must be in MIDDLEWARE in order to use the admin application.
?: (admin.E409) 'django.contrib.messages.middleware.MessageMiddleware' must be in MIDDLEWARE in order to use the admin application.
?: (admin.E410) 'django.contrib.sessions.middleware.SessionMiddleware' must be in MIDDLEWARE in order to use the admin application.

解决方案:

MIDDLEWARE_CLASSES = ('django.contrib.sessions.middleware.SessionMiddleware','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','oscar.apps.basket.middleware.BasketMiddleware','django.contrib.flatpages.middleware.FlatpageFallbackMiddleware',
)

改成:

MIDDLEWARE  = ['django.contrib.sessions.middleware.SessionMiddleware','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','oscar.apps.basket.middleware.BasketMiddleware','django.contrib.flatpages.middleware.FlatpageFallbackMiddleware'
]

改变的地方有3处

①MIDDLEWARE_CLASSES->MIDDLEWARE

②元组()改成列表[]

③'django.contrib.auth.middleware.SessionAuthenticationMiddleware',在Django新版本中删除

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