将项目迁移至django2.X, 中间件提示错误为:
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.
Solution:
Writing format and modify variable names middleware can be.
Note: variable name from MIDDLEWARE_CLASSES become MIDDLEWARE
Settings in previous projects django middleware default format is written:
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', )
The use of the new version of Django to create a new project, middleware written format as ↓↓↓:
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware', ]
We can see the new version of django modify the middleware written format: the transition from the tuple list and removed a middleware, SessionAuthenticationMiddleware.
Writing format and modify variable names middleware can solve this problem.
As SessionAuthenticationMiddleware middleware, if there have been, you can comment out
Otherwise error:
AttributeError: module 'django.contrib.auth.middleware' has no attribute 'SessionAuthenticationMiddleware'
The above exception was the direct cause of the following exception:
...
...
...
django.core.exceptions.ImproperlyConfigured: WSGI application 'yourproject.wsgi.application' could not be loaded; Error importing module.