' blogg' is not a registered namespace，求助
打开/blogg/index页面，显示NoReverseMatch at /blogg/index/' blogg' is not a registered namespace
下面是代码
这是应用下的URL配置
from django.urls import path
from . import views
app_name = 'blogg'
urlpatterns = [
path('index/', views.index),
path('article/<int:article_id>/', views.article_page, name='article_page'),
]这是根url下的配置
from django.contrib import admin
from django.urls import path, include
urlpatterns = [
path('admin/', admin.site.urls),
path('blogg/', include('blogg.urls', namespace='blogg')),
path('blog2/', include('blog2.urls')),
]这是index.html文件
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>
<a href="">新文章</a>
</h1>
{% for article in articles %}
<a href="{% url ' blogg:atricle_page ' article.id %}">{{ article.title }}</a>
<br/>
{% endfor %}
</body>
</html>
