python - DetailView 中的 Django ModelForm

Question

我有一个显示 Post 的 DetailView。我现在想添加为 Post 创建 Comment 的功能。为此，我需要 DetailView 中的 CommentForm，以便我可以在与 Post 位于同一页面上时创建评论。

这可能吗，还是我应该寻找另一种方法，例如“手动”进行表单处理？

class Comment(models.Model):
    body = models.TextField()
    created_at = models.DateTimeField(auto_now_add=True)
    author_name = models.CharField(max_length=255)
    parent_post = models.ForeignKey('Post',related_name='comments')

class PostDetailView(BlogMixin,DetailView):
    """ A view for displaying a single post """
    template_name = 'post.html'
    model = Post
    #Add some code for the CommentForm here?

class CommentForm(forms.ModelForm):
    class Meta:
        model = Comment
        exclude = ("parent_post","created_at")

    def create_view(request, **kwargs):
        if request.method == "POST":
            parent_fk = request.args['parent_fk'] #Im hoping to find how this will work soon 
            form = CommentForm(request.POST)
            if form.is_valid():
                new_comment = form.save(commit=False)
                new_comment.parent_post = parent_fk
                new_comment.save()
                return HttpResponseRedirect(request.META.get('HTTP_REFERER'))

** 替代方案 **

我一直在尝试应用解决方案 - A better alternative - 但我明白

Exception Value: __init__() takes exactly 1 argument (3 given)
Exception Location: .../sitepackages/django/core/handlers/base.py in get_response, line 112

目前还无法追踪它。

class PostView(BlogMixin,DetailView):
    """ A view for displaying a single post """
    template_name = 'post.html'
    model = Post
    def get_context_data(self, **kwargs):
        context = super(PostView, self).get_context_data(**kwargs)
        context['form'] = CommentForm()
        return context

class PostDetailView(View):

    def get(self, request, *args, **kwargs):
        view = PostView.as_view()
        return view(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        view = PostComment.as_view()
        return view(request, *args, **kwargs)

class PostComment(  SingleObjectMixin , FormView):
    template_name = 'post.html'
    form_class = CommentForm
    model = Post

    def post(self, request, *args, **kwargs):
        self.object = self.get_object()
        return super(PostComment, self).post(request, *args, **kwargs)

    def get_success_url(self):
        return reverse('post-detail', kwargs={'pk': self.object.pk})
class BlogMixin(object):
    """
    Basic mixin for all the views. Update the context with additional
    information that is required across the whole site, typically
    to render base.html properly
    """
    def get_context_data(self, *args, **kwargs):
        context = super(BlogMixin, self).get_context_data(*args, **kwargs)
        blog = Blog.get_unique()
        context.update({
            'blog': blog,
            'active_user': users.get_current_user(),
            'is_admin': users.is_current_user_admin()
        })
        return context

url.py: url(r'^post/(?P[\d]+)/$',views.PostDetailView.,name="post-detail"),

Answer 1

如果您想使用第一种方法，您可以将 FK 设置为隐藏字段。在您看来，您可以在将评论提交到数据库之前保存FK。像这样:

if form.is_valid():
    comment = form.save(commit=False)
    comment.parent_post = parent_post
    comment.save()

编辑:如果您想获取评论，则可以使用按帖子过滤来获取评论的查询集。