Question

我正在尝试登录用户，但出现属性错误。

这是我的 forms.py ：

class Login(forms.Form):
    email = forms.EmailField(max_length=250)
    password = forms.CharField(widget=forms.PasswordInput)

    def login_user(self):
        email = self.cleaned_data['email']
        password = self.cleaned_data.get('password')
        user = authenticate(email=email, password=password)
        if user in User.objects.all():
            login(self, user)
        else:
            return render(self, 'todoapp/waiting_2.html')

这是我的 views.py ：

def login_user(request):
    if request.method == 'POST':
        login_form = Login(request.POST)
        if login_form.is_valid():
            login_form.login_user()
            login_form.save()
            return HttpResponseRedirect(reverse('dashboard'))
        else:
            return render(request, 'todoapp/waiting_2.html')
    return render(request, 'registration/login.html', {'form': Login()})

当我填写字段并尝试登录时，出现错误：

AttributeError at /login/

'Login' object has no attribute 'session'

跟踪：

File "/home/gblp250/PycharmProjects/practice/venv/local/lib/python2.7/site-packages/django/core/handlers/exception.py" in inner
  41.             response = get_response(request)

File "/home/gblp250/PycharmProjects/practice/venv/local/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
  187.                 response = self.process_exception_by_middleware(e, request)

File "/home/gblp250/PycharmProjects/practice/venv/local/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
  185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/home/gblp250/PycharmProjects/assignment/todoapp/views.py" in login_user
  48.             login_form.login_user(request)

File "/home/gblp250/PycharmProjects/assignment/todoapp/forms.py" in login_user
  27.             login(self, request, user)

File "/home/gblp250/PycharmProjects/practice/venv/local/lib/python2.7/site-packages/django/contrib/auth/__init__.py" in login
  126.     if SESSION_KEY in request.session:

Exception Type: AttributeError at /login/
Exception Value: 'Login' object has no attribute 'session'

Answer 1

这里有一些错误。尝试以login_user方法形式呈现的主要方法之一。除了其他以外，您尝试将self作为要渲染的请求参数，这毫无意义。

如果/其他都删除，则全部删除。您不需要渲染；但也请注意，您的if条件不必要地效率低下。如果您拥有用户，则一定是用户。

最后，是错误的实际原因，您再次尝试将self代替请求，但是这次将其作为login的参数。该代码属于视图。

最后，该表单不是ModelForm，因此没有保存方法。

所以，形式：

def login_user(self):
    email = self.cleaned_data['email']
    password = self.cleaned_data.get('password')
    return authenticate(email=email, password=password)

并查看：

    if login_form.is_valid():
        user = login_form.login_user()
        if user:
            login(request, user)
        return HttpResponseRedirect(reverse('dashboard'))

尽管此时您也可以将所有逻辑移至视图。

Answer 2

login()将请求作为第一个参数，您以表单作为第一个参数来调用它。 https://docs.djangoproject.com/en/2.1/topics/auth/default/#django.contrib.auth.login

如何解决Django中的属性错误？

2 个答案: