在查询中添加slug id

我有一个包含get函数的detailview。这个get函数检查某个条件是否为真,如果为真,则抛出一个错误。但是,我很难在查询中找到slug id post= 我怎样才能在这里添加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