Django - authenticate()具有该用户名的用户已存在

Question

好吧,我很困惑.

我正在尝试构建一个登录页面,但每当我尝试登录时,django都会给出用户名已经存在的错误.我没有在save()任何地方使用过.

我正在使用authenticate(),我提到了Django文档:https: //docs.djangoproject.com/en/1.10/topics/auth/default/#how-to-log-a-user-in

这是我的代码,请告诉我我哪里错了:

forms.py

class LoginForm(forms.ModelForm):
    username = forms.CharField(widget=forms.TextInput(attrs={'placeholder': 'Username'}))
    password = forms.CharField(widget=forms.PasswordInput(attrs={'placeholder': 'Password'}))

class Meta:
    model = User
    fields = ['username', 'password']

views.py

class LoginFormView(View):
    form_class = LoginForm
    template_name = 'login.html'

    # display a blank form
    def get(self, request):
        form = self.form_class(None)
        return render(request, self.template_name, {'form': form})

    # authenticate user
    def post(self, request):
        form = self.form_class(request.POST)

        if form.is_valid():

            username = form.cleaned_data['username']
            password = form.cleaned_data['password']

            user = authenticate(username=username, password=password)

            if user is not None:
                if user.is_active:
                    login(request, user)
                    return redirect('slrtcebook:home')

        return render(request, self.template_name, {'form': form})

的login.html

<div class="form-container">
    <form method="post" enctype="multipart/form-data">

        {% csrf_token %}
        {% for field in form %}
            {{ field }}
            {{ field.errors }}
        {% endfor %}

        <input id="submit" type="submit" value="Log in" />
    </form>
</div>

<p>Don't have an account? <a href="/">Register here</a></p>

Answer 1

不要为此使用ModelForm; 它会假设您正在尝试创建用户,并验证您是否可以使用您输入的数据执行此操作.只需使用标准表单 - 继承forms.Form和删除Meta类.