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python - Django：警告-不允许的方法（POST）

问题描述

我知道上面的错误是什么意思。发布时似乎我无法处理表格。我可以在基于函数的视图中做到这一点，但在基于类的视图中我有点迷失了。

我正在创建一个评论应用程序，这里是应用程序中的forms.py内容comment：

class CommentForm(forms.Form):
    content_type = forms.CharField(widget=forms.HiddenInput)
    object_id = forms.CharField(widget=forms.HiddenInput)
    body = forms.CharField(widget=forms.Textarea)

然后在DetailView博客应用程序中，我是这样处理的：

class BlogDetail(DetailView):
    model = Blog
    template_name = 'blogs/blog_detail.html'
    context_object_name = 'blog'

    def get_object(self):
        blog_slug = self.kwargs.get('blog_slug')
        return get_object_or_404(Blog, slug=blog_slug)

    def get_context_data(self, *args, **kwargs):
        obj = self.get_object()
        context = super().get_context_data(**kwargs)
        context['comments'] = Comment.objects.filter_by_instance(obj)

        """ comment form """
        initial_data = {
            'content_type': obj.get_content_type,
            'object_id': obj.id
        }
        if self.request.method == 'POST':
            form = CommentForm(self.request.POST, initial=initial_data)
            if form.is_valid():
                c_type = form.cleaned_data.get('content_type')
                content_type = ContentType.objects.get(model=c_type)
                object_id = form.cleaned_data.get('object_id')
                body = form.cleaned_data.get('body')
                new_comment, created = Comment.objects.get_or_create(
                    user=self.request.user,
                    content_type=content_type,
                    object_id=object_id,
                    body=body
                )
        else: 
            form = CommentForm(initial=initial_data)

        context['comment_form'] = form

        return context

虽然我通过了form = CommentForm(self.request.POST, initial=initial_data)，但听起来有问题，有人可以帮忙吗？谢谢

编辑：

class BlogDetail(DetailView, FormView):
    model = Blog
    template_name = 'blogs/blog_detail.html'
    context_object_name = 'blog'
    form_class = CommentForm

    def get_object(self):
        blog_slug = self.kwargs.get('blog_slug')
        return get_object_or_404(Blog, slug=blog_slug)

    def get_initial(self):
        obj = self.get_object()
        return {
            'content_type': obj.get_content_type,
            'object_id': obj.id
        }

    def form_valid(self, form):
        c_type = form.cleaned_data.get('content_type')
        content_type = ContentType.objects.get(model=c_type)
        object_id = form.cleaned_data.get('object_id')
        body = form.cleaned_data.get('body')

        Comment.objects.create(
            user=self.request.user,
            content_type=content_type,
            object_id=object_id,
            body=body
        )

编辑2：

任何人都可以发现这种方法的错误：

class BlogDetail(DetailView):
    model = Blog
    template_name = 'blogs/blog_detail.html'
    context_object_name = 'blog'
    form_class = CommentForm

    def get_object(self):
        blog_slug = self.kwargs.get('blog_slug')
        return get_object_or_404(Blog, slug=blog_slug)

    def get(self, request, *args, **kwargs):
        obj = self.get_object()

        initial_data = {
            'content_type': obj.get_content_type,
            'object_id': obj.id
        }
        print("aaaaaaaaaaaaaaaaaaaaaaaaaaaaa", obj.get_content_type)
        form = self.form_class(initial=initial_data)

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

    def post(self, request, *args, **kwargs):
        form = self.form_class(request.POST)

        if form.is_valid():
            c_type = form.cleaned_data.get('content_type')
            content_type_2 = ContentType.objects.get(model=c_type)
            object_id = form.cleaned_data.get('object_id')
            body = form.cleaned_data.get('body')

            Comment.objects.create(
                user=request.user,
                content_type=content_type_2,
                object_id=object_id,
                body=body,
            )

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

标签： pythondjangodjango-views

解决方案

帖子由post基于类的视图的方法处理：

class BlogDetail(DetailView):
    # ...
    def post(self, request, *args, **kwargs):
        # all your form processing

Django 附带了几个视图，它们已经在表单处理过程中提供了各种钩子，例如 FormView，您可以利用它们：

class BlogDetail(DetailView, FormView):
    form_class = CommentForm

    def form_valid(self, form):
        c_type = form.cleaned_data.get('content_type')
        # ...

    def get_initial(self):
        obj = self.get_object()
        return {
            'content_type': obj.get_content_type,
            'object_id': obj.id
        }

    # ....

默认情况下，表单被传递"form"到上下文中。

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