Django: "AttributeError: type object 'AutoField' has no attribute 'rsplit'" after adding "DEFAULT_AUTO_FIELD" to settings.py

Question

我刚刚将我的 Django 项目从 3.1.6 更新到 3.2.3。运行 python manage.py runserver 之后，服务器运行出现以下警告：

core.CoreUser: (models.W042) Auto-created primary key used when not defining a primary key type, by default 'django.db.models.AutoField'.
        HINT: Configure the DEFAULT_AUTO_FIELD setting or the CoreConfig.default_auto_field attribute to point to a subclass of AutoField, e.g. 'django.db.models.BigAutoField'.

然后我记得我需要在将项目从<3.2版更新到>=3.2版的Django后添加一个DEFAULT_AUTO_FIELD设置到settings.py，所以我做了：

# settings.py

DEFAULT_AUTO_FIELD = django.db.models.AutoField

然后我再次尝试 python manage.py runserver，但这次我收到了不同的警告：

(venv) C:\Users\Chris\my_project>python manage.py runserver
Traceback (most recent call last):
  ... (truncated for brevity)
  File "C:\Users\Chris\my_project\venv\lib\site-packages\django\utils\module_loading.py", line 13, in import_string
    module_path, class_name = dotted_path.rsplit('.', 1)
AttributeError: type object 'AutoField' has no attribute 'rsplit'

我认为问题是我的迁移或数据库引起的，所以我删除了 db.sqlite3 和应用程序的所有迁移。然后我运行一个新的python manage.py makemigrations，只是导致了同样的错误：AttributeError: type object 'AutoField' has no attribute 'rsplit'

知道为什么会发生这种情况吗？

Answer 1

因为需要把django.db.models.AutoField用引号括起来，变成字符串，像这样：

# settings.py

DEFAULT_AUTO_FIELD = 'django.db.models.AutoField'

这种问题可能有点棘手，因为如果您使用真正的导入而不是点分模块路径作为字符串，Django 不会给您任何提示。请格外注意您在 settings.py.

中使用字符串

Django: "AttributeError: type object 'AutoField' has no attribute 'rsplit'" after adding "DEFAULT_AUTO_FIELD" to settings.py

Django: "AttributeError: type object 'AutoField' has no attribute 'rsplit'" after adding "DEFAULT_AUTO_FIELD" to settings.py

django

django-models

django-settings