'django.contrib.auth.middleware.AuthenticationMiddleware' must be in MIDDLEWARE in order to use the admin application.

错误环境

django 1.11 迁移到 django 2

错误日志

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.

解决办法

# django 1.11
# 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',
# )

# django 2
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',
]