id summary reporter owner description type status component version severity resolution keywords cc stage has_patch needs_docs needs_tests needs_better_patch easy ui_ux 31166 Provide context for ImproperlyConfigured exceptions in URL resolver. Ram Rachum Ram Rachum "The patch is ready here: https://github.com/django/django/pull/12263 This will make it have a text of ""this exception is the direct result of"" instead of ""During handling of the above exception, another exception occurred"" This is more accurate for the case of this exception. If this change will be merged, there are a couple more place in this module where it can be added. When it happened to me a few weeks ago, it was due to a circular import, which I then fixed. Now of course, when I tried to reproduce the circular import to show you, I couldn't. But I could achieve the same thing by renaming `urlpatterns` to `xurlpatterns`, so it wouldn't be available. This is the error I get: {{{ Exception in thread django-main-thread: Traceback (most recent call last): File ""C:\Program Files\Python38\lib\site-packages\django\urls\resolvers.py"", line 590, in url_patterns iter(patterns) TypeError: 'module' object is not iterable During handling of the above exception, another exception occurred: Traceback (most recent call last): File ""C:\Program Files\Python38\lib\threading.py"", line 932, in _bootstrap_inner self.run() File ""C:\Program Files\Python38\lib\threading.py"", line 870, in run self._target(*self._args, **self._kwargs) File ""C:\Program Files\Python38\lib\site-packages\django\utils\autoreload.py"", line 53, in wrapper fn(*args, **kwargs) File ""C:\Program Files\Python38\lib\site-packages\django\core\management\commands\runserver.py"", line 117, in inner_run self.check(display_num_errors=True) File ""C:\Program Files\Python38\lib\site-packages\django\core\management\base.py"", line 392, in check all_issues = self._run_checks( File ""C:\Program Files\Python38\lib\site-packages\django\core\management\base.py"", line 382, in _run_checks return checks.run_checks(**kwargs) File ""C:\Program Files\Python38\lib\site-packages\django\core\checks\registry.py"", line 72, in run_checks new_errors = check(app_configs=app_configs) File ""C:\Program Files\Python38\lib\site-packages\django\core\checks\urls.py"", line 13, in check_url_config return check_resolver(resolver) File ""C:\Program Files\Python38\lib\site-packages\django\core\checks\urls.py"", line 23, in check_resolver return check_method() File ""C:\Program Files\Python38\lib\site-packages\django\urls\resolvers.py"", line 408, in check messages.extend(check_resolver(pattern)) File ""C:\Program Files\Python38\lib\site-packages\django\core\checks\urls.py"", line 23, in check_resolver return check_method() File ""C:\Program Files\Python38\lib\site-packages\django\urls\resolvers.py"", line 407, in check for pattern in self.url_patterns: File ""C:\Program Files\Python38\lib\site-packages\django\utils\functional.py"", line 48, in __get__ res = instance.__dict__[self.name] = self.func(instance) File ""C:\Program Files\Python38\lib\site-packages\django\urls\resolvers.py"", line 597, in url_patterns raise ImproperlyConfigured(msg.format(name=self.urlconf_name)) django.core.exceptions.ImproperlyConfigured: The included URLconf '' 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. }}} The bad part is `During handling of the above exception, another exception occurred`. After my fix, it looks like this: {{{ Exception in thread django-main-thread: Traceback (most recent call last): File ""C:\Program Files\Python38\lib\site-packages\django\urls\resolvers.py"", line 590, in url_patterns iter(patterns) TypeError: 'module' object is not iterable The above exception was the direct cause of the following exception: Traceback (most recent call last): File ""C:\Program Files\Python38\lib\threading.py"", line 932, in _bootstrap_inner self.run() File ""C:\Program Files\Python38\lib\threading.py"", line 870, in run self._target(*self._args, **self._kwargs) File ""C:\Program Files\Python38\lib\site-packages\django\utils\autoreload.py"", line 53, in wrapper fn(*args, **kwargs) File ""C:\Program Files\Python38\lib\site-packages\django\core\management\commands\runserver.py"", line 117, in inner_run self.check(display_num_errors=True) File ""C:\Program Files\Python38\lib\site-packages\django\core\management\base.py"", line 392, in check all_issues = self._run_checks( File ""C:\Program Files\Python38\lib\site-packages\django\core\management\base.py"", line 382, in _run_checks return checks.run_checks(**kwargs) File ""C:\Program Files\Python38\lib\site-packages\django\core\checks\registry.py"", line 72, in run_checks new_errors = check(app_configs=app_configs) File ""C:\Program Files\Python38\lib\site-packages\django\core\checks\urls.py"", line 13, in check_url_config return check_resolver(resolver) File ""C:\Program Files\Python38\lib\site-packages\django\core\checks\urls.py"", line 23, in check_resolver return check_method() File ""C:\Program Files\Python38\lib\site-packages\django\urls\resolvers.py"", line 408, in check messages.extend(check_resolver(pattern)) File ""C:\Program Files\Python38\lib\site-packages\django\core\checks\urls.py"", line 23, in check_resolver return check_method() File ""C:\Program Files\Python38\lib\site-packages\django\urls\resolvers.py"", line 407, in check for pattern in self.url_patterns: File ""C:\Program Files\Python38\lib\site-packages\django\utils\functional.py"", line 48, in __get__ res = instance.__dict__[self.name] = self.func(instance) File ""C:\Program Files\Python38\lib\site-packages\django\urls\resolvers.py"", line 597, in url_patterns raise ImproperlyConfigured(msg.format(name=self.urlconf_name)) from type_error # Ram hack, remove django.core.exceptions.ImproperlyConfigured: The included URLconf '' 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. }}} Now the text is corrected to `The above exception was the direct cause of the following exception`" Cleanup/optimization closed Core (URLs) dev Normal fixed Shai Berger Ready for checkin 1 0 0 0 0 0