不满足条件时重定向用户[重复]

post= 如何在这里添加slug id?

class ReportPostView(LoginRequiredMixin, DetailView):
    login_url = '/login/'
    template_name = 'core/report-post.html'
    model = Post
    slug_field = 'id'

    def get(self, request, *args, **kwargs):
        if Report.objects.filter(actor=self.request.user, post={{ slug_id_should_be_here }}).exists():
            return HttpResponseNotFound("You have already reported this Post")
        else:
            return