django.core.exceptions.ImproperlyConfigured: The included URLconf 'xsite.urls' does not appear to ha

问题

django.core.exceptions.ImproperlyConfigured: The included URLconf ‘xsite.urls’ does not appear to have any patterns in it.

File "C:\Programs\Miniconda3\envs\djg2env\lib\site-packages\django\urls\base.py", line 58, in reverse
    app_list = resolver.app_dict[ns]
  File "C:\Programs\Miniconda3\envs\djg2env\lib\site-packages\django\urls\resolvers.py", line 513, in app_dict
    self._populate()
  File "C:\Programs\Miniconda3\envs\djg2env\lib\site-packages\django\urls\resolvers.py", line 447, in _populate
    for url_pattern in reversed(self.url_patterns):
  File "C:\Programs\Miniconda3\envs\djg2env\lib\site-packages\django\utils\functional.py", line 80, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Programs\Miniconda3\envs\djg2env\lib\site-packages\django\urls\resolvers.py", line 593, in url_patterns
    raise ImproperlyConfigured(msg.format(name=self.urlconf_name))
django.core.exceptions.ImproperlyConfigured: The included URLconf 'xsite.urls' does not appear to have any patterns in it. If you see valid patterns in the file then the issue is probably caused by a circular import.

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出错代码

class ArticleUpdateView(LoginRequiredMixin, UpdateView):
    model = Article
    form_class = ArticleForm
    context_object_name = 'form'
    template_name = 'aiblogs/article_update_form.html'
    success_url = reverse('blogs:article-list')

    def get_context_data(self, *args, **kwargs):
        context = super(ArticleUpdateView, self).get_context_data(*args, **kwargs)
        context['albums'] = Album.objects.filter(blog=self.request.user.myblog).order_by('indx')
        return context

不出错代码

class ArticleUpdateView(LoginRequiredMixin, UpdateView):
    model = Article
    form_class = ArticleForm
    context_object_name = 'form'
    template_name = 'aiblogs/article_update_form.html'
    # success_url = reverse('blogs:article-list')

    def get_context_data(self, *args, **kwargs):
        context = super(ArticleUpdateView, self).get_context_data(*args, **kwargs)
        context['albums'] = Album.objects.filter(blog=self.request.user.myblog).order_by('indx')
        return context

    def get_success_url(self):
        return reverse('blogs:article-list')