properly passing form post data to get_context_data() in detailview

Hi,

I'm trying to process a form through a detailview that adds a comment to a blog post. Here's my view code:

class PostDetailView(DetailView):

    model = Post

    template_name = 'blog_detail.html'

    queryset = Post.objects.filter(published=True)

    form_class = CommentForm

      

    def get_context_data(self, **kwargs):

        context = super(PostDetailView, self).get_context_data(**kwargs)

        post = self.get_object()

        context['comments'] = Comment.objects.filter(published=True).filter(post_id=post.id)

        context['form'] = CommentForm

        return context

    

    def post(self, request, *args, **kwargs):

        post = self.get_object()

        form = CommentForm(request.POST)

        if form.is_valid():

            f = form.save(commit=False)

            f.post_id = post.id

            f.ip_address = self.get_client_ip(self.request)

            f.save()

            form.send_email()

            messages.add_message(self.request, messages.SUCCESS, 'Comment submitted. Thanks!')

            return HttpResponseRedirect(request.META.get('HTTP_REFERER', None))

        else:

            # this fails with attribute error: 'PostDetailView' object has no attribute 'object'

            return self.render_to_response(self.get_context_data(form=form))

    

    def get_client_ip(self, request):

        x_forwarded_for = request.META.get('HTTP_X_FORWARDED_FOR')

        if x_forwarded_for:

            ip = x_forwarded_for.split(',')[0]

        else:

            ip = request.META.get('REMOTE_ADDR')

        return ip

And here's the relevant form code:

class CommentForm(ModelForm):

    class Meta:

        model = Comment

        exclude = ('post', 'published')

        

    def send_email(self):

        text = self.cleaned_data['text']

        name = self.cleaned_data['name']

        send_mail(

            'comment submission',

            name + ' wrote:\n' + text,

            [from_email_address],

            ([to_email_address])

        )

Form processing appears to work as expected when the form fields are actually filled and the form is valid but fails with an "Attribute Error: 'PostDetailView' object has no attribute 'object'" when the fields are blank (i.e. form is not valid). As a relative newbie to python and django I'm at a complete loss as to what I'm doing wrong here. 

Thanks in advance for any pointers.

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