Django模型“没有显式声明app_label”

我真是一筹莫及。经过十几个小时的故障排除，可能更多，我以为我终于可以做生意了，但接着我发现:

Model class django.contrib.contenttypes.models.ContentType doesn't declare an explicit app_label

网上关于这方面的信息太少了，没有解决方案可以解决我的问题。任何建议都将不胜感激。

我使用的是Python 3.4和Django 1.10。

从我的settings.py:

INSTALLED_APPS = [
    'DeleteNote.apps.DeletenoteConfig',
    'LibrarySync.apps.LibrarysyncConfig',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]

我的app .py文件是这样的:

from django.apps import AppConfig


class DeletenoteConfig(AppConfig):
    name = 'DeleteNote'

and

from django.apps import AppConfig


class LibrarysyncConfig(AppConfig):
    name = 'LibrarySync'

当前回答

我有一个类似的问题，但我能够解决我的通过明确指定app_label使用元类在我的模型类

class Meta:
    app_label  = 'name_of_my_app'

2020-07-07 09:59:36

其他回答

很可能您有依赖的导入。

在我的例子中，我在我的模型中使用了一个序列化器类作为参数，并且序列化器类使用了这个模型: serializer_class = AccountSerializer

from ..api.serializers import AccountSerializer

class Account(AbstractBaseUser):
    serializer_class = AccountSerializer
    ...

在“serializers”文件中:

from ..models import Account

class AccountSerializer(serializers.ModelSerializer):
    class Meta:
        model = Account
        fields = (
            'id', 'email', 'date_created', 'date_modified',
            'firstname', 'lastname', 'password', 'confirm_password')
    ...

2017-10-07 16:07:11

当我试图将Django Rest Framework应用程序升级到DRF 3.6.3和Django 1.11.1时，我得到了这个错误。

对于在这种情况下的其他人，我在GitHub问题中找到了我的解决方案，这是在DRF设置中取消UNAUTHENTICATED_USER设置:

# webapp/settings.py
...
REST_FRAMEWORK = {
    ...
    'UNAUTHENTICATED_USER': None
    ...
}

2017-05-26 09:08:02

我在使用。/manage.py shell时得到了这个然后我不小心从根项目级目录导入

# don't do this
from project.someapp.someModule import something_using_a_model
# do this
from someapp.someModule import something_using_a_model

something_using_a_model()

2017-08-22 04:38:04

如果所有配置都是正确的，导入时可能会一团糟。注意您是如何导入有问题的模型的。

下面的代码在.models import Business中不起作用。请使用完全导入路径:from myapp。模型进口业务

2019-11-22 10:07:48

我只是遇到了这个问题，并找出了哪里出了问题。由于之前的回答没有描述这个问题发生在我身上，我想我可以把它发布给其他人:

the issue came from using python migrate.py startapp myApp from my project root folder, then move myApp to a child folder with mv myApp myFolderWithApps/. I wrote myApp.models and ran python migrate.py makemigrations. All went well. then I did the same with another app that was importing models from myApp. Kaboom! I ran into this error, while performing makemigrations. That was because I had to use myFolderWithApps.myApp to reference my app, but I had forgotten to update MyApp/apps.py. So I corrected myApp/apps.py, settings/INSTALLED_APPS and my import path in my second app. but then the error kept happening: the reason was that I had migrations trying to import the models from myApp with the wrong path. I tried to correct the migration file, but I went at the point where it was easier to reset the DB and delete the migrations to start from scratch.

长话短说: -这个问题最初是来自myApp的apps.py中的应用程序名称错误，在设置和我的第二个应用程序的导入路径。 -但仅仅纠正这三个地方的路径是不够的，因为导入时引用了错误的应用程序名称。因此，同样的错误在迁移过程中不断发生(除了这次是从迁移中)。

所以…检查您的迁移，祝您好运!

2018-03-15 22:58:46

Django模型“没有显式声明app_label”

推荐文章

最新文章

标签