ValueError: 相关模型 'user.UserProfile' 无法解析

Question

我正在尝试UserProfile在我的用户应用程序中创建一个模型，而不是从 继承models.Model，而是从 django 自己的User模型继承，以便我拥有一个带有额外字段的自定义用户模型。但是当我运行python manage.py test命令时，它给了我以下错误：

    Creating test database for alias 'default'...

Traceback (most recent call last):

  File "manage.py", line 15, in <module>

    execute_from_command_line(sys.argv)

  File "C:\Users\User\AppData\Local\Programs\lib\site-packages\django\core\management\__init__.py", line 381, in execute_from_command_line

    utility.execute()

  File "C:\Users\User\AppData\Local\Programs\lib\site-packages\django\core\management\__init__.py", line 375, in execute

    self.fetch_command(subcommand).run_from_argv(self.argv)

  File "C:\Users\User\AppData\Local\Programs\lib\site-packages\django\core\management\commands\test.py", line 26, in run_from_argv

    super().run_from_argv(argv)

  File "C:\Users\User\AppData\Local\Programs\lib\site-packages\django\core\management\base.py", line 316, in run_from_argv

    self.execute(*args, **cmd_options)

  File "C:\Users\User\AppData\Local\Programs\lib\site-packages\django\core\management\base.py", line 353, in execute

    output = self.handle(*args, **options)

  File "C:\Users\User\AppData\Local\Programs\lib\site-packages\django\core\management\commands\test.py", line 56, in handle

    failures = test_runner.run_tests(test_labels)

  File "C:\Users\User\AppData\Local\Programs\lib\site-packages\django\test\runner.py", line 604, in run_tests

    old_config = self.setup_databases()

  File "C:\Users\User\AppData\Local\Programs\lib\site-packages\django\test\runner.py", line 551, in setup_databases

    self.parallel, **kwargs

  File "C:\Users\User\AppData\Local\Programs\lib\site-packages\django\test\utils.py", line 174, in setup_databases

    serialize=connection.settings_dict.get('TEST', {}).get('SERIALIZE', True),

  File "C:\Users\User\AppData\Local\Programs\lib\site-packages\django\db\backends\base\creation.py", line 68, in create_test_db

    run_syncdb=True,