include() got an unexpected keyword argument 'app_name' - django

Question

i am making a blog application for my website with django-2.0
when i run server i see the following error
File "C:\Users\User\Desktop\djite\djite\djite\urls.py", line 7, in <module>
url(r'^blog/', include('blog.urls', namespace='blog', app_name='blog')),
TypeError: include() got an unexpected keyword argument 'app_name'
here is my main urls.py
from django.contrib import admin
from django.conf.urls import url,include
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^blog/', include('blog.urls', namespace='blog', app_name='blog')),
]
and here's my blog/urls.py
from django.conf.urls import url
from . import views
urlpatterns = [
url(r'^$', views.post_list, name='post_list'),
url(r'^(?P<year>\d{4})/(?P<month>\d{2})/(?P<day>d{2})/(?P<post>
[-/w]+)/$', views.post_detail, name='post_detail'),
]
my views.py:
from django.shortcuts import render, HttpResponse, get_object_or_404
from blog.models import Post
def post_list(request): #list
posts=Post.published.all()
return render(request, 'blog/post/list.html', {'posts': posts})
def post_detail(request, year, month, day, post):
post =get_object_or_404(post, slog=post,
status='published',
publush__year=year,
publish__month=month,
publish__day=day)
return render (request, 'blog/post/detail.html', {'post':post})
models.py:
# -*- coding:utf-8 -*-
from django.db import models
from django.conf import settings
from django.utils import timezone
from django.contrib.auth.models import User
from django.utils.translation import ugettext_lazy as _
from django.urls import reverse
class PublishedManager(models.Manager):
def get_queryset(self):
return super(PublishedManager,
self).get_queryset().filter(status='published')
class Post(models.Model):
STATUS_CHOICES = (
('draft', 'Draft'),
('published', 'Published'),
)
title =
models.CharField(max_length=255,verbose_name=_('title'),help_text=_('add
title'))
content = models.TextField(verbose_name=_('content'),help_text=_('write
here'))
publish = models.DateTimeField(default=timezone.now)
createtime = models.DateTimeField(_('create time'),auto_now_add=True,
auto_now=False,help_text=_('create time'))
updatetime = models.DateTimeField(_('update time'),auto_now_add=False,
auto_now=True,help_text=_('update time'))
author = models.ForeignKey(settings.AUTH_USER_MODEL,
verbose_name=_('author'),
on_delete=models.DO_NOTHING,help_text=_('choose author'))
slug = models.SlugField(unique=True, max_length=255,help_text=_('add
slug'))
status = models.CharField(max_length=10, choices=STATUS_CHOICES,
default='draft')
def __unicode__(self):
return self.title
def __str__(self):
return self.title
class Meta:
ordering = ('-publish',)
verbose_name = _('Post')
verbose_name_plural = _('Posts')
def get_absolute_url(self):
return reverse('blog:post_detail', args=[self.publish.year,
self.publish.strftime('%m'),
self.publish.strftime('%d'),
self.slug])
also my views.py has a problem that i don't think that's related to my current error, when i delete
namespace='blog', app_name='blog'
from this line in main urls.py
url(r'^blog/', include('blog.urls', namespace='blog', app_name='blog')),
the server runs but when i go to this directory:
http://localhost:8000/blog/
i see this error
AttributeError at /blog/
type object 'Post' has no attribute 'published'
it says that this line of code has problem in views.py
posts=Post.published.all()

Answer 1

Using app_name with include is deprecated in Django 1.9 and does not work in Django 2.0. Set app_name in blog/urls.py instead.
app_name = 'blog'
urlpatterns = [
url(r'^$', views.post_list, name='post_list'),
...
]
Then change the include to:
url(r'^blog/', include('blog.urls')),
You don't need namespace='blog', as it will default to the application namespace anyway.
The second error is unrelated. You have forgotten to instantiate your custom manager on the model.
class Post(models.Model):
...
published = PublishedManager()

Answer 2

In Django 2.0 app_name, will not support :
Use of project URLs:
from django.contrib import admin
from django.urls import include, path
urlpatterns = [
path('admin/', admin.site.urls),
path(r'blog/', include('blog.urls')),//use this
]