问Django在Nginx服务器上没有反向匹配

EN

'NoReverseMatch at / Reverse for 'post_detail' not found. 'post_detail' is not a valid view function or pattern name.'

from . import views

urlpatterns = [
        url(r'^$', views.post_list, name='post_list'),
        url(r'^post/(?P<pk>\d+)/$', views.post_detail, name='post_detail'),
]
~

from django.shortcuts import render, get_object_or_404

def post_list(request):
    posts = Post.objects.filter(published_date__lte=timezone.now()).order_by('published_date')
    return render(request, 'blog/post_list.html', {'posts': posts})

def post_detail(request, pk):
    post = get_object_or_404(Post, pk=pk)
    return render(request, 'blog/post_detail.html', {'post': post})
~

server {
listen 80;
server_name XXX.XXX.XXX.XXX;

location = /favicon.ico { access_log off; log_not_found off; }
location /static/ {
    root /home/XXXX/Django;
}

location / {
    include proxy_params;
    proxy_pass http://unix:/home/XXX/Django/BizBlog.sock;
}
}

from django.contrib import admin
from django.urls import path
from django.conf.urls import include
from django.conf.urls import url

urlpatterns = [
    path('admin/', admin.site.urls),
    url(r'', include('blog.urls')),
]