在AuthenticationMiddleware | Django中添加用户id属性

关于Django身份验证中间件，我有以下问题：

class AuthenticationMiddleware(MiddlewareMixin):
    def process_request(self, request):
        assert hasattr(request, 'session'), (
            "The Django authentication middleware requires session middleware "
            "to be installed. Edit your MIDDLEWARE setting to insert "
            "'django.contrib.sessions.middleware.SessionMiddleware' before "
            "'django.contrib.auth.middleware.AuthenticationMiddleware'."
        )
        request.user = SimpleLazyObject(lambda: get_user(request))

正如您在这里看到的，中间件从后端调用方法get_user（在我的例子中是simple_jwt），并将该方法放入

SimpleLazyObject

中，以便稍后进行评估

def get_user(self, validated_token):
    """
    Attempts to find and return a user using the given validated token.
    """
    try:
        user_id = validated_token[api_settings.USER_ID_CLAIM]
    except KeyError:
        raise InvalidToken(_('Token contained no recognizable user identification'))

    try:
        user = User.objects.get(**{api_settings.USER_ID_FIELD: user_id})
    except User.DoesNotExist:
        raise AuthenticationFailed(_('User not found'), code='user_not_found')

    if not user.is_active:
        raise AuthenticationFailed(_('User is inactive'), code='user_inactive')

    return user

我想做的是保留

request.user=SimpleLazyObject（lambda:get_user（request））

以便为使用它的应用程序提供用户实例，但对于我的自定义应用程序，我想添加类似

伪码 为了避免在我只需要

user\u id

的情况下查询数据库中每个用户对象的请求，我已经在后端的

get\u user

方法中直接使用了该id

问题–如何将

user\u id

从

get\u user（）

传递到

AuthenticationMiddleware。处理请求（）

并将

request.user\u id

属性设置为请求，而无需计算

SimpleLazyObject

奇怪的是，我无法在

类JWTAuthentication（authentication.BaseAuthentication）：

中为请求分配属性，其中

get\u user（）

属于

多谢各位

Internal Server Error: /auth/users/me/
Traceback (most recent call last):
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\asgiref\sync.py", line 330, in thread_handler
    raise exc_info[1]
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\django\core\handlers\exception.py", line 38, in inner
    response = await get_response(request)
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\django\utils\deprecation.py", line 126, in __acall__
    response = await sync_to_async(
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\asgiref\sync.py", line 296, in __call__
    ret = await asyncio.wait_for(future, timeout=None)
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\asyncio\tasks.py", line 440, in wait_for
    return await fut
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\asgiref\current_thread_executor.py", line 23, in run
    result = self.fn(*self.args, **self.kwargs)
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\asgiref\sync.py", line 334, in thread_handler
    return func(*args, **kwargs)
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\django\contrib\auth\middleware.py", line 26, in process_request
    request.user_id = _get_user_session_key(request)
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\django\contrib\auth\__init__.py", line 58, in _get_user_session_key
    return get_user_model()._meta.pk.to_python(request.session[SESSION_KEY])
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\django\contrib\sessions\backends\base.py", line 65, in __getitem__
    return self._session[key]
KeyError: '_auth_user_id'

---

您已经有可用的用户id。它是从auth.get_user（）中的会话解码的，您可以将其复制到自己的中间件中：

从django.contrib.auth导入\u获取\u用户\u会话\u密钥
request.user\u id=\u获取\u用户\u会话\u密钥（请求）

这是一个Django私有API，不知道他们为什么将其保持私有。但您也可以只复制它实现的一行程序：

request.user\u id=get\u user\u model（）。\u meta.pk.to\u python(
请求。会话[会话密钥]
)

谢谢你的回答。在第一种情况下，它抛出一个异常（在主问题块中回溯），在第二种情况下，没有可用的会话密钥或“会话密钥”。我经常使用JWT后端，所以它可能不是任何会话密钥。如果你不使用会话身份验证，那么这个中间件什么都不做，你需要使用自己的，或者如果你的JWT身份验证可用，看看他们的，看看他们在哪里设置了request.user。这就是答案。出于某种原因，我确信中间件与jwtauth有关。但事实并非如此。谢谢你的回答

Internal Server Error: /auth/users/me/
Traceback (most recent call last):
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\asgiref\sync.py", line 330, in thread_handler
    raise exc_info[1]
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\django\core\handlers\exception.py", line 38, in inner
    response = await get_response(request)
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\django\utils\deprecation.py", line 126, in __acall__
    response = await sync_to_async(
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\asgiref\sync.py", line 296, in __call__
    ret = await asyncio.wait_for(future, timeout=None)
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\asyncio\tasks.py", line 440, in wait_for
    return await fut
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\asgiref\current_thread_executor.py", line 23, in run
    result = self.fn(*self.args, **self.kwargs)
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\asgiref\sync.py", line 334, in thread_handler
    return func(*args, **kwargs)
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\django\contrib\auth\middleware.py", line 26, in process_request
    request.user_id = _get_user_session_key(request)
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\django\contrib\auth\__init__.py", line 58, in _get_user_session_key
    return get_user_model()._meta.pk.to_python(request.session[SESSION_KEY])
  File "C:\ProgramData\Miniconda3\envs\entropy\lib\site-packages\django\contrib\sessions\backends\base.py", line 65, in __getitem__
    return self._session[key]
KeyError: '_auth_user_id'