如果不满足条件，则重定向用户

Question

我有一个页面，用户可以在其中报告帖子。如果他们已经报告了该特定帖子，则不允许他们访问此页面。我正在使用DetailView，帖子ID为子弹，因此看起来像这样：/report/p/3/这是我到目前为止的内容：

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, but I don't know how to get it from the slug }}).exists():
            return HttpResponseNotFound("You have already reported this Post")
        else:
            return

如何检查这种情况并重定向用户？