Question

尝试在我的主页视图中添加表单，并在提交表单时收到此错误。这是我的代码：

views.py

class BoxesView(ListView, FormMixin):
    template_name = 'polls.html'
    form_class = UserRegistrationForm

    def post(self, request, *args, **kwargs):
        form = self.get_form()
        if form.is_valid():
            username = form.cleaned_data['username']
            password = form.cleaned_data['password']
            user = User.objects.create_user(username=username, password=password)
            user.save()
            return redirect('/')
        return self.form_invalid(form) 

    def get_context_data(self, **kwargs):
        context = super(BoxesView, self).get_context_data()

        context['form'] = self.get_form()
        question_list = Question.objects.all().order_by('-date')
        choice = Choice.objects.all()
        context['question_list'] = question_list
        context['choice'] = choice

        q_list = []
        returned_list = []

        for i in question_list:
            q_list.append(i)

        for a, b in CATEGORY_CHOICES:
            name = resolve(self.request.path_info).url_name
            if b == name:
                category = a

        search = self.request.GET.get('search')
        posts = Post.objects.all().filter(category=category).order_by('-date')
        if search:
            posts = posts.filter(
                Q(title__icontains=search) |
                Q(content__icontains=search)
            )        
        else:
            posts = Post.objects.all().filter(category=category).order_by('-date')

        context['posts'] = posts

        total = 0
        for post in posts:
            returned_list.append(post)
            total += 1
            if total == 4:
                total = 0
                for i in q_list:
                    returned_list.append(i)
                    q_list.remove(i)
                    break

        search = self.request.GET.get('search')
        posts = Post.objects.all().filter(category=category).order_by('-date')
        if search:
            posts = posts.filter(
                Q(title__icontains=search) |
                Q(content__icontains=search)
            )
        else:
            posts = Post.objects.all().filter(category=category).order_by('-date')

        context['posts'] = posts

        return context

    def get_queryset(self):
        pass

forms.py

class UserRegistrationForm(forms.ModelForm):
    password = forms.CharField(widget=forms.PasswordInput)

    class Meta:
        model = User

        fields = [
            'username',
            'password',
        ]

base.html文件

<form action="" enctype="multipart/form-data" method="post">{% csrf_token %}
    <div class="registerBox">
        {{ form.username }}
        {{ form.password }}
        <input type="submit" value="register"/>
    </div>
</form>

我的追溯指向了以下几行：return self.form_invalid(form)＆amp; context = super(BoxesView, self).get_context_data()。希望这可以告诉你问题是什么，但我一直无法解决。任何想法？

Answer 1

如果您使用的是ListView，则应specify a model attribute使用

class BoxesView(ListView, FormMixin):
    template_name = 'polls.html'
    model = yourModel

或者您应该在get_queryset方法中指定queryset。

def get_queryset(self):
    qs = yourModel.objects.all()
    return qs

请注意queryset is accessed in templates by the default name object_list。

另外，不是使用ListView中的表单创建对象，而是只尝试在ListView中列出对象。 Use CreateView to create objects。您的ListView可能如下所示。

class BoxesView(ListView):
    template_name = 'polls.html'
    model = yourModel
    paginate_by = 20

有关详细信息，请参阅CORS (Cross-Origin Resource Sharing)

同样从您的问题看来，您似乎正在尝试迭代Post对象，这些对象作为上下文数据传递给模板。请注意，Overriding def get_context_data(self) is to provide extra context variables，而不是queryset和ListView总是期望在从ListView继承的类中定义model或get_queryset（self）。如果您要做的是为Post对象创建ListView，请尝试在班级中设置model=Post。

Answer 2

我管理一个解决方案，如果您的类中没有user_list变量，则必须将其放入，但最好重写构造函数，但仍需将model变量放入您的类中。

class BoxesView(ListView, FormMixin):
    template_name = 'polls.html'
    form_class = UserRegistrationForm
    model = YourModel

    def __init__(self, *args, **kwargs):
        super(BoxesView, self).__init__(*args, **kwargs)
        self.object_list = self.get_queryset()

这很有用：P

AttributeError：'BoxesView'对象没有属性'object_list'

2 个答案: