Django 在登录时区分不正确的登录信息和非活动用户

Question

目前我在我的站点中添加了一种注册时通过电子邮件确认的方法。我看到的是，当用户注册时，但还没有点击确认 link 并尝试登录，我无法区分错误的 user/password 和未确认的用户。

这是我的登录函数：

def loginUser(request):
    if request.user.is_authenticated:
        return redirect("decks:index")
    if request.method == "POST":
        form = AuthenticationForm(request, data=request.POST)
        if form.is_valid():
            username = form.cleaned_data.get('username')
            password = form.cleaned_data.get('password')
            user = authenticate(username=username, password=password)
            if user is not None and user.is_active:
                login(request, user)
                return redirect("myApp:portal")
            elif user is not None:
                messages.error(request, "Email is not confirmed.")
            else:
                messages.error(request, "Invalid username or password.")
        else:
            messages.error(request, "Invalid username or password.")
    form = AuthenticationForm()
    return render(request, "myApp/login.html", context = {'login_form': form})

问题是，当运行 form.is_valid() 执行 /home/nowork/.local/lib/python3.8/site-packages/django/contrib/auth ModelBackend 中的 authenticate 函数时：

def authenticate(self, request, username=None, password=None, **kwargs):
    if username is None:
        username = kwargs.get(UserModel.USERNAME_FIELD)
    if username is None or password is None:
        return
    try:
        user = UserModel._default_manager.get_by_natural_key(username)
    except UserModel.DoesNotExist:
        # Run the default password hasher once to reduce the timing
        # difference between an existing and a nonexistent user (#20760).
        UserModel().set_password(password)
    else:
        if user.check_password(password) and self.user_can_authenticate(user):
            return user

因此当 is_active 标志为 False 时，form.is_valid() 永远不会为真。所以我无法判断是用户+密码的组合不正确还是用户尚未确认。

我不确定这样做的正确方法是什么，我想做类似的事情：

User.objects.get(username=request.POST['username'])

用户能否以某种方式利用它？有没有更好的方法来完成这个？

使用 python3 和 Django 4.0

Answer 1

您可以将自己的CustomLoginBackend设为

from django.contrib.auth import get_user_model

class CustomLoginBackend(object):

    def authenticate(self, request, username, password):
        User = get_user_model()
        try:
            user = User.objects.using(db_name).get(username=username)
        except User.DoesNotExist:
            return None
        else:
            if user.check_password(password):
                return user
        return None

然后在你的 views.py

def loginUser(request):
    if request.user.is_authenticated:
        return redirect("decks:index")
    if request.method == "POST":
        form = AuthenticationForm(request, data=request.POST)
        if form.is_valid():
            username = form.cleaned_data.get('username')
            password = form.cleaned_data.get('password')
            user = authenticate(username=username, password=password)
            if user is not None:
                if user.is_active == True:
                    login(request, user)
                    return redirect("myApp:portal")
                else:
                    messages.error(request, "Email is not confirmed.")
            else:
                messages.error(request, "Invalid username or password.")
        else:
            messages.error(request, "Invalid username or password.")
    form = AuthenticationForm()
    return render(request, "myApp/login.html", context = {'login_form': form})

最后别忘了在 settings.py 中添加 AUTHENTICATION_BACKENDS 作为

AUTHENTICATION_BACKENDS = ['path_to_your.CustomLoginBackend ',]

Django 在登录时区分不正确的登录信息和非活动用户

Django differentiate between incorrect login information and inactive user on login

python

django

django-authentication