執行django時報如下錯誤:

Model class App.models.User doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS

原因:

應該是在settings檔案中沒有註冊你自己的app模組

如下：

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'App',(應該新增你自己定義的app模組名)
]