<input type="hidden" name="next" value="{% url my_comment_was_posted %}" />

class NewPost(DetailView):
    context_object_name = "new_detail"
    #queryset = New.objects.all()
    model = New  
    def get_context_data(self, **kwargs):
        # Call the base implementation first to get a context
        context = super(NewPost, self).get_context_data(**kwargs)
        # Add in a QuerySet of all the books
        context['new_list'] = New.objects.all()
        return context

#views.py

from django.http import HttpResponseRedirect

return HttpResponseRedirect('url')

def redirect_post(request):
    poss = request.META.get('HTTP_REFERER')
    return HttpResponseRedirect(poss)

<form action="" method="post">
тут твоя форма
</form>

return HttpResponseRedirect(request.path)