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我是 Django 新手，我正在尝试创建简单的用户注册/登录应用程序。对于注册，我使用自定义 UserCreationForm：

def registration(request):
    if request.method == 'POST':
        form = UserCreationForm(request.POST)
        if form.is_valid():
            new_user = form.save()
            messages.info(request, "You've successfully registered")
            return HttpResponseRedirect('/')
    else:
        form = UserCreationForm
    return render(request, 'accounts/registration.html', {'form': form})

而且效果很好。但是编写登录功能我遇到了困难。我在 /accounts/login 'User' 对象有 AttributeError 没有属性 'backend'。即使登录名/密码正确，authenticate() 似乎也返回 None 对象。

def login(request):
    if request.method == "POST":
        form = LoginForm(request.POST)
        if form.is_valid():
            userData = form.cleaned_data
            user = authenticate(username=userData['username'],password=userData['password'])
            auth_login(request, user)
            messages.info(request, "You're successfully logged in")
            return HttpResponseRedirect('/')
        else:
            messages.info(request, 'Invalid username or password')
            return HttpResponseRedirect('/accounts/login')
    else:
        form = LoginForm() 
    return render(request, 'accounts/login.html', {'form': form}

我认为关键是密码以散列形式保存在数据库中，这就是为什么 userData['password'] 与数据库中相同用户名的值不同的原因。

我修复此错误的最佳方法是什么？

跟踪错误

Internal Server Error: /accounts/login
Traceback (most recent call last):
  File "C:\Python27\myproject\djcode\first_venv\venv\lib\site-packages\django\core\handlers\base.py"
, line 115, in get_response
    response = callback(request, *callback_args, **callback_kwargs)
  File "C:\Python27\myproject\djcode\first_venv\myownproject\accounts\views.py", line 36, in login
    auth_login(request, user)
  File "C:\Python27\myproject\djcode\first_venv\venv\lib\site-packages\django\contrib\auth\__init__.
py", line 92, in login
    request.session[BACKEND_SESSION_KEY] = user.backend
  File "C:\Python27\myproject\djcode\first_venv\venv\lib\site-packages\django\utils\functional.py",
line 203, in inner
    return func(self._wrapped, *args)
AttributeError: 'User' object has no attribute 'backend'
4

1 回答 1

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在你的代码中试试这个

user = authenticate(username=userData['username'],password=userData['password'])
if user:
    user.backend = 'django.contrib.auth.backends.ModelBackend'
    auth_login(request, user)
else:
    print "invalid login"
于 2013-07-05T13:41:33.710 回答