django - 如何解决 Django 项目中的以下错误：“django.contrib.auth.models.DoesNotExist：组匹配查询不存在。”

Question

我正在尝试在我的 django 项目上运行迁移，但我遇到了这个非常奇怪的错误，我已经有一段时间无法解决了，我不明白。

这是我得到的错误：

Anaconda3\envs\mbt\lib\site-packages\django\db\models\query.py", line 415, in get
    raise self.model.DoesNotExist(
django.contrib.auth.models.DoesNotExist: Group matching query does not exist.

我试过跑python manage.py makemigrations python manage.py migrate auth python manage.py migrate my_app_name

我还将组名直接插入到我的 postgresql 数据库中，以防他们不发布。此错误阻止我在本地运行服务器。

我认为 Group 模型是自动生成的，我不需要做太多就可以开始使用它。它在我的数据库中绝对可见。

任何帮助将不胜感激！谢谢你！！

这是完整的追溯：

     Traceback (most recent call last):
  File "manage.py", line 21, in <module>
    main()
  File "manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "C:\Users\nance\Anaconda3\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "C:\Users\nance\Anaconda3\lib\site-packages\django\core\management\__init__.py", line 395, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Users\nance\Anaconda3\lib\site-packages\django\core\management\base.py", line 328, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\Users\nance\Anaconda3\lib\site-packages\django\core\management\base.py", line 366, in execute
    self.check()
  File "C:\Users\nance\Anaconda3\lib\site-packages\django\core\management\base.py", line 395, in check
    include_deployment_checks=include_deployment_checks,
  File "C:\Users\nance\Anaconda3\lib\site-packages\django\core\management\base.py", line 382, in _run_checks
    return checks.run_checks(**kwargs)
  File "C:\Users\nance\Anaconda3\lib\site-packages\django\core\checks\registry.py", line 72, in run_checks
    new_errors = check(app_configs=app_configs)
  File "C:\Users\nance\Anaconda3\lib\site-packages\django\core\checks\urls.py", line 40, in check_url_namespaces_unique
    all_namespaces = _load_all_namespaces(resolver)
  File "C:\Users\nance\Anaconda3\lib\site-packages\django\core\checks\urls.py", line 57, in _load_all_namespaces
    url_patterns = getattr(resolver, 'url_patterns', [])
  File "C:\Users\nance\Anaconda3\lib\site-packages\django\utils\functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\nance\Anaconda3\lib\site-packages\django\urls\resolvers.py", line 588, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "C:\Users\nance\Anaconda3\lib\site-packages\django\utils\functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\nance\Anaconda3\lib\site-packages\django\urls\resolvers.py", line 581, in urlconf_module
    return import_module(self.urlconf_name)
  File "C:\Users\nance\Anaconda3\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "C:\Users\nance\repo\project\app1\urls.py", line 28, in <module>
    + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
  File "C:\Users\nance\Anaconda3\lib\site-packages\django\urls\conf.py", line 34, in include
    urlconf_module = import_module(urlconf_module)
  File "C:\Users\nance\Anaconda3\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "C:\Users\nance\repo\project\app1\urls.py", line 5, in <module>
    from app1 import views
  File "C:\Users\nance\repo\project\app1\views.py", line 188, in <module>
    class AllMentorsView(TemplateView):
  File "C:\Users\nance\repo\project\app1\views.py", line 192, in AllMentorsView
    mentor_group = Group.objects.get(name="Mentor")
  File "C:\Users\nance\Anaconda3\lib\site-packages\django\db\models\manager.py", line 82, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "C:\Users\nance\Anaconda3\lib\site-packages\django\db\models\query.py", line 417, in get
    self.model._meta.object_name
django.contrib.auth.models.DoesNotExist: Group matching query does not exist.

标签： djangopostgresqldjango-modelsdjango-admin