Question

**编辑：当然，我发现这与UserPassesTextMixin没有任何关系，因为在尝试直接访问403页面时会弹出此错误。但仍然不确定该怎么做。

我正在尝试使用UserPassesTestMixin来检查正在请求哪个模型的编辑视图，并运行特定于该模型的测试以查看用户是否应该具有访问权限。什么都没有用，我只是想了解一下这个mixin是如何运作的。在test_func中返回false后，视图尝试重定向到/ 403 /，但我得到以下错误。

TypeError at /403/
permission_denied() missing 1 required positional argument: 'exception'

视图

class DeviceUpdate(LoginRequiredMixin, UserPassesTestMixin, UpdateView):
    model = Device
    template_name_suffix = '_update_form'
    form_class = DeviceUpdateForm

    def test_func(self):
        return edit_permission_test(self.get_object())

...

perms.py

def edit_permission_test(model_object):
    possible_models = ['Device',]
    if isinstance(model_object, Device):
        print('This is a Device model object')
        return True
    else:
        print('This doesnt look like a Device model object')
        return False

我似乎无法在互联网上发现有助于解决此错误的任何内容。

Answer 1

我认为这个问题只与如何为本地开发配置url模式有关。以前我的主要urls.py看起来像这样：

urlpatterns = [
    url(r'^$', TemplateView.as_view(template_name='pages/home.html'), name="home"),

    ...

    # Your stuff: custom urls includes go here
    url(r'^devices/', include('auto_toner.urls', namespace='auto_toner', app_name='auto_toner'), name="devices"),

    url(r'^400/$', default_views.bad_request),
    url(r'^403/$', default_views.permission_denied),
    url(r'^404/$', default_views.page_not_found),
    url(r'^500/$', default_views.server_error),


] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

如果settings.DEBUG为True，我将URL更改为在模式中包含kwargs。

if settings.DEBUG:
    # This allows the error pages to be debugged during development, just visit
    # these url in browser to see how these error pages look like.
    urlpatterns += [
        url(r'^400/$', default_views.bad_request, kwargs={'exception': Exception('Bad Request!')}),
        url(r'^403/$', default_views.permission_denied, kwargs={'exception': Exception('Permission Denied')}),
        url(r'^404/$', default_views.page_not_found, kwargs={'exception': Exception('Page not Found')}),
        url(r'^500/$', default_views.server_error),
    ]
    if 'debug_toolbar' in settings.INSTALLED_APPS:
        import debug_toolbar

        urlpatterns += [
            url(r'^__debug__/', include(debug_toolbar.urls)),
        ]

如何将“异常”参数传递给403视图？

1 个答案: