Django 迁移问题：字段 oauth2_provider.AccessToken.application 是使用惰性引用声明的

Question

我在 Django 项目中使用 django-oauth-toolkit 库时遇到 Django 迁移问题。错误消息指出字段 oauth2_provider.AccessToken.application 是使用对“apis.customapplicationmodel”的惰性引用声明的，但未安装应用程序“apis”。

以下是有关我的项目设置的一些信息：

Django version: 4.0.6
django-oauth-toolkit version: 2.2.0

项目结构：

accs
cms
apis
    migrations
    models
        __init.py__
        custom_application.py
    static
    templates
    views
    __init.py__
    apps.py
    urls.py
owner
sonline
tnt

自定义应用程序.py

from django.db import models
from oauth2_provider.models import AbstractApplication

from tnt.models import TntModel


class CustomApplicationModel(AbstractApplication):
    tnt = models.ForeignKey(TntModel, on_delete=models.CASCADE)

    class Meta(AbstractApplication.Meta):
        pass

settings.py，位于

sonline

目录

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django.contrib.humanize',
    'cms',
    'accs',
    'tnt',
    'owner',
    'rest_framework',
    'background_task',
    'apis',
    'oauth2_provider',
]

# OAUTH2 settings
OAUTH2_PROVIDER = {
    'ACCESS_TOKEN_EXPIRE_SECONDS': 604800
}

OAUTH2_PROVIDER_APPLICATION_MODEL = 'apis.CustomApplicationModel'

当我运行以下命令时，它给出以下错误：

(venv) PS D:\s> python .\manage.py makemigrations
Migrations for 'apis':
  apis\migrations\0001_initial.py
    - Create model CustomApplicationModel
(venv) PS D:\s> python .\manage.py migrate       
Operations to perform:
  Apply all migrations: accs, admin, auth, background_task, cms, contenttypes, oauth2_provider, apis, sessions, tnt
Traceback (most recent call last):
  File "D:\s\manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "D:\venv\lib\site-packages\django\core\management\__init__.py", line 446, in execute_from_command_line
    utility.execute()
  File "D:\venv\lib\site-packages\django\core\management\__init__.py", line 440, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "D:\venv\lib\site-packages\django\core\management\base.py", line 414, in run_from_argv
    self.execute(*args, **cmd_options)
  File "D:\venv\lib\site-packages\django\core\management\base.py", line 460, in execute
    output = self.handle(*args, **options)
  File "D:\venv\lib\site-packages\django\core\management\base.py", line 98, in wrapped
    res = handle_func(*args, **kwargs)
  File "D:\venv\lib\site-packages\django\core\management\commands\migrate.py", line 236, in handle
    pre_migrate_apps = pre_migrate_state.apps
  File "D:\venv\lib\site-packages\django\utils\functional.py", line 49, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "D:\venv\lib\site-packages\django\db\migrations\state.py", line 544, in apps
    return StateApps(self.real_apps, self.models)
  File "D:\venv\lib\site-packages\django\db\migrations\state.py", line 615, in __init__
    raise ValueError("\n".join(error.msg for error in errors))
ValueError: The field oauth2_provider.AccessToken.application was declared with a lazy reference to 'apis.customapplicationmodel', but app 'apis' isn't installed.    
The field oauth2_provider.Grant.application was declared with a lazy reference to 'apis.customapplicationmodel', but app 'apis' isn't installed.
The field oauth2_provider.IDToken.application was declared with a lazy reference to 'apis.customapplicationmodel', but app 'apis' isn't installed.
The field oauth2_provider.RefreshToken.application was declared with a lazy reference to 'apis.customapplicationmodel', but app 'apis' isn't installed.
(venv) PS D:\s> 

我想做什么？： 我需要在

oauth2_provider_application

表中添加一个属性，您可以在

custom_application.py

中看到，我正在添加引用 TntModel 的 tnt 属性。

你能帮我一下吗？预先感谢您。

Answer 1

有同样的错误 我删除所有

migrations

文件并截断数据库中的

django_migrations

表 然后再次运行

makemigrations

和

migrate

.