另一个应用程序的视图在django中不起作用？

Question

我有两个应用程序 帖子 董事会。 我需要在电路板模板中创建网址链接，以便从帖子应用中查看。

我的根urls.py:

urlpatterns = [

    url(r'^', include('boards.urls')),
    url(r'^', include('posts.urls',  namespace="posts")),

]

posts.urls：

# -*- coding: utf-8 -*-
from django.conf.urls import include, url
from views import (
    listofposts,
    create_post,
    detail,
    update_post,
    category,
    )

urlpatterns = [
    url(r'^create/', 
        create_post ,
        name='create_post'),
    url(r'^category/(?P<slug>[-\w]+)/$',
        category,
        name='category'),
    url(r'^(?P<slug>[-\w]+)/edit/$',
        update_post,
        name = 'update_post'),
    url(r'^(?P<slug>[-\w]+)/$',
        detail,
        name = 'detail'),
    url(r'^$',
        listofposts ,
        name='listofpost'),
]

开发板模板链接

<a class="navbar-brand" href="{% url 'posts:listofposts' %}">Home</a>

我弄错了：

例外值：

Reverse for 'listofposts' not found. 'listofposts' is not a valid view function or pattern name.