POST 方法在我使用 Formview 的 Django 中不起作用

Question

我有 class 同时使用 FormView 和 DetailView。当我发送 post 请求时，我在终端 [06/Apr/2022 14:44:16] 中看到此登录“POST /profile/question/1/ HTTP/1.1" 200 6327，但无法使用 post、form_valid 和 form_invalid 方法。不调用这 3 个函数，因此不存储表单

这是我的代码 ->

class QuestionDetail(FormView, DetailView):
    model = Question
    form_class = CommentForm
    template_name = "Profile/question_detail.html"
    context_object_name = "detail"

    def dispatch(self, request, *args, **kwargs):
        try:
            self.object = self.get_object()
        except:
            return redirect('Profile:error')

        self.get_object()
        return super(QuestionDetail, self).get(request, *args, **kwargs)

    def get_success_url(self):
        return self.request.path

    def get_context_data(self, *args, **kwargs):
        like_exist=bool(Like.objects.filter(user=self.request.user, question=self.get_object()))
        dislike_exist=bool(DisLike.objects.filter(user=self.request.user, question=self.get_object()))
        self.object=self.get_object()
        context = super(QuestionDetail, self).get_context_data(**kwargs)
        try:
            question = Question.objects.get(id=self.kwargs["pk"])
            context['detail'] = question
            context['like_ex'] = like_exist
            context['dislike_ex'] = dislike_exist
        except Http404:
            return reverse("Profile:error")
        return context

    def post(self, request, *args, **kwargs):
        print("Not working post method")

    def form_invalid(self, form):
        print("Error")
        return super(QuestionDetail, self).form_invalid(form)

    def form_valid(self, form):
        print("It's here")
        form.instance.user = self.request.user
        form.instance.question = self.get_object()
        form.save()
        return super(QuestionDetail, self).form_valid(form)

我不明白发生了什么。

Answer 1

您需要在您的dispatch方法中调用post方法：

class QuestionDetail(FormView, DetailView):
    model = Question
    form_class = CommentForm
    template_name = "Profile/question_detail.html"
    context_object_name = "detail"

    def dispatch(self, request, *args, **kwargs):
        try:
            self.object = self.get_object()
        except:
            return redirect('Profile:error')

        self.get_object()
        return self.post(request, *args, **kwargs)

    def get_success_url(self):
        return self.request.path

    def get_context_data(self, *args, **kwargs):
        like_exist=bool(Like.objects.filter(user=self.request.user, question=self.get_object()))
        dislike_exist=bool(DisLike.objects.filter(user=self.request.user, question=self.get_object()))
        self.object=self.get_object()
        context = super(QuestionDetail, self).get_context_data(**kwargs)
        try:
            question = Question.objects.get(id=self.kwargs["pk"])
            context['detail'] = question
            context['like_ex'] = like_exist
            context['dislike_ex'] = dislike_exist
        except Http404:
            return reverse("Profile:error")
        return context

    def post(self, request, *args, **kwargs):
        print("Not working post method")

    def form_invalid(self, form):
        print("Error")
        return super(QuestionDetail, self).form_invalid(form)

    def form_valid(self, form):
        print("It's here")
        form.instance.user = self.request.user
        form.instance.question = self.get_object()
        form.save()
        return super(QuestionDetail, self).form_valid(form)

现在在 post 的实现中调用 form_invalid 和 form_valid。

Answer 2

长评论多于明确回答

最好结合使用 SingleObjectMixin 和 FormView。从两个完整的 CBV 类继承可能不受支持，并且可能会在例如 Django verion 升级后引起头痛。而 *Mixin 类旨在很好地复合。

你必须知道的主要事情是 self.object 不是通过包含 mixin 设置的。您必须明确设置它，例如通过子类化 setup 方法：

def setup( self, request, *args, **kwargs):
    super().setup( request, *args, **kwargs)
    self.object = self.get_object()  # link SingleObjectMixin

Classy CBVs 在用于导航 Class-Based 视图

的宝贵资源中

POST 方法在我使用 Formview 的 Django 中不起作用

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