gistfile1.txt

class CommentForm(forms.ModelForm):
    class Meta:
        model = Comment
        fields = ('content',)

    def __init__(self, user, post, *args, **kwargs):
        self.user = user
        self.post = post
        super(CommentForm, self).__init__(*args, **kwargs)

    def save(self, commit=True):
        self.instance.user = self.user
        self.instance.post = self.post
        return super(CommentForm, self).save(commit)


def valpost(request, slug=None):
    instance = get_object_or_404(Post, slug=slug)
    comments = Comment.objects.all()
    form = CommentForm(user=request.user, post=instance)
    if request.method == 'POST':
        form = CommentForm(user=request.user, post=instance, data=request.POST)
        if form.is_valid():
            form.save()
            return redirect(<success page>)   # or render
    context = {
        "title": instance.title,
        "instance": instance,
        "form": form,
        "comments": comments,
    }
    return render(request, 'post_detail.html', context)