解决Django集成Google OAuth登录时的持续报错问题

首次在Django应用中添加Google登录功能，使用social_auth_app_django库时遇到多个报错，包括ValueError（Expected 2 got 1）和后续的TypeError（issubclass() arg 1 must be a class）。

版本说明 #

• Django版本：4.2.13
• Python版本：3.10.5
• social_auth_app_django库版本：5.4.1

settings.py配置（API密钥已隐藏） #

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    "games.apps.GamesConfig",
    "account.apps.AccountConfig",
    "forums.apps.ForumsConfig",
    "play.apps.PlayConfig",
    "make_game.apps.MakeGameConfig",
    "administration.apps.AdministrationConfig",
    "bootstrap5",
    "payments.apps.PaymentsConfig",
    "social_django"
]

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',
    'account.middleware.DeviceDetectionMiddleware',
    # "django.middleware.debug.DebugMiddleware",
    'social_django.middleware.SocialAuthExceptionMiddleware',
]

ROOT_URLCONF = 'superstarstudios.urls'

SOCIAL_AUTH_GOOGLE_OAUTH2_KEY = "my-google-key"
SOCIAL_AUTH_GOOGLE_OAUTH2_SECRET = "my-google-secret"
SOCIAL_AUTH_GOOGLE_OAUTH2_SCOPE = [
    "email",
]
AUTHENTICATION_BACKENDS = (
    'social_core.backends.google.GoogleOAuth2'
)

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [
            BASE_DIR / "templates"
        ],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
                'account.context_processors.device_type',
                "social_django.context_processors.backends",
                'social_django.context_processors.login_redirect'
            ],
        },
    },
]

LOGIN_REDIRECT_URL = "/games"
LOGOUT_REDIRECT_URL = "/"

SOCIAL_AUTH_PIPELINE = (
    'social_core.pipeline.social_auth.social_details', 
    'social_core.pipeline.social_auth.social_uid',
    'social_core.pipeline.social_auth.auth_allowed',
    'social_core.pipeline.social_auth.social_user',
    'social_core.pipeline.user.get_username', 
    'social_core.pipeline.user.create_user',
    'account.pipeline.create_user',
    'social_core.pipeline.social_auth.associate_user',
    'social_core.pipeline.social_auth.load_extra_data',
    'social_core.pipeline.user.user_details',
)

引发报错的核心函数 #

引发ValueError的module_member函数 #

def module_member(name):
    try:
        mod, member = name.rsplit(".", 1)
        module = import_module(mod)
        return getattr(module, member)
    except (ValueError, AttributeError, ImportError) as e:
        print(f"Couldn't import {name}: {e}")

引发TypeError的load_backends函数 #

def load_backends(backends, force_load=False):
    """
    Load backends defined on SOCIAL_AUTH_AUTHENTICATION_BACKENDS, backends will
    be imported and cached on BACKENDSCACHE. The key in that dict will be the
    backend name, and the value is the backend class.

    Only subclasses of BaseAuth (and sub-classes) are considered backends.

    Previously there was a BACKENDS attribute expected on backends modules,
    this is not needed anymore since it's enough with the
    AUTHENTICATION_BACKENDS setting. BACKENDS was used because backends used to
    be split on two classes the authentication backend and another class that
    dealt with the auth mechanism with the provider, those classes are joined
    now.

    A force_load boolean argument is also provided so that get_backend
    below can retry a requested backend that may not yet be discovered.
    """
    global BACKENDSCACHE
    if force_load:
        BACKENDSCACHE = OrderedDict()
    if not BACKENDSCACHE:
        for auth_backend in backends:
            backend = module_member(auth_backend)
            if issubclass(backend, BaseAuth):
                BACKENDSCACHE[backend.name] = backend
    return BACKENDSCACHE

详细错误信息 #

Couldn't import s: not enough values to unpack (expected 2, got 1)
Internal Server Error: /account-sys/login/google-oauth2/
Traceback (most recent call last):
  File "C:\Users\norou\AppData\Local\Programs\Python\Python310\lib\site-packages\social_core\backends\utils.py", line 49, in get_backend
    return BACKENDSCACHE[name]
KeyError: 'google-oauth2'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\norou\AppData\Local\Programs\Python\Python310\lib\site-packages\django\core\handlers\exception.py", line 55, in inner
    response = get_response(request)
  File "C:\Users\norou\AppData\Local\Programs\Python\Python310\lib\site-packages\django\core\handlers\base.py", line 197, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\norou\AppData\Local\Programs\Python\Python310\lib\site-packages\django\views\decorators\cache.py", line 62, in _wrapper_view_func
    response = view_func(request, *args, **kwargs)
  File "C:\Users\norou\AppData\Local\Programs\Python\Python310\lib\site-packages\social_django\utils.py", line 63, in wrapper
    return func(request, backend, *args, **kwargs)
  File "C:\Users\norou\AppData\Local\Programs\Python\Python310\lib\site-packages\social_django\utils.py", line 44, in wrapper
    request.backend = load_backend(
  File "C:\Users\norou\AppData\Local\Programs\Python\Python310\lib\site-packages\social_django\utils.py", line 27, in load_backend
    return strategy.get_backend(name, redirect_uri=redirect_uri)
  File "C:\Users\norou\AppData\Local\Programs\Python\Python310\lib\site-packages\social_core\strategy.py", line 176, in get_backend
    Backend = self.get_backend_class(name)
  File "C:\Users\norou\AppData\Local\Programs\Python\Python310\lib\site-packages\social_core\strategy.py", line 172, in get_backend_class
    return get_backend(self.get_backends(), name)
  File "C:\Users\norou\AppData\Local\Programs\Python\Python310\lib\site-packages\social_core\backends\utils.py", line 52, in get_backend
    load_backends(backends, force_load=True)
  File "C:\Users\norou\AppData\Local\Programs\Python\Python310\lib\site-packages\social_core\backends\utils.py", line 35, in load_backends
    if issubclass(backend, BaseAuth):
TypeError: issubclass() arg 1 must be a class

已尝试修改rsplit参数为(".", 2)，未解决问题，寻求有效解决方案。

内容的提问来源于stack exchange，提问作者knnorou2