(轉)關於Django Specifying a namespace in include() without providing an app_name

轉載自：https://blog.csdn.net/weixin_40841752/article/details/79335345

運行環境

PyCharm 2017.1 
Django 2.0.1 
python 3.6.1

在網頁項目中使用include()方法

• 項目目錄中同時存在app/urls.py和proj/urls.py
• 在proj/urls.py使用include方法

from django.urls import path,include
from app import urls as app_url
urlpatterns = [
    path('', include(app_url, namespace='common')),
]

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• 在app/urls.py中對應url

from django.urls import path
from .views import index
urlpatterns = [
    path('',index,name='index'),
]

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runserver發生錯誤

django.core.exceptions.ImproperlyConfigured: 
Specifying a namespace in include() without providing an app_name is not supported. 
Set the app_name attribute in the included module, 
or pass a 2-tuple containing the list of patterns and app_name instead.

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意思爲： 
在include方法裏面指定namespace卻不提供app_name是不允許的。 
在包含的模塊裏設置app_name變量，或者在include方法裏面提供app_name參數。

解決方法

方法1：在proj/urls.py中修改

from django.urls import path,include
from app import urls as app_url
urlpatterns = [
    path('', include((common_url,'common'), namespace='common')),
]

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方法2：在app/urls.py中修改

from django.urls import path
from .views import index
app_name='common'
urlpatterns = [
    path('',index,name='index'),
]