&引用；与查询匹配的帖子不存在。”；导航到“时出错”；管理页面"；在django？

我正在学习Django，并致力于制作一个简单的博客网站。现在整个项目工作正常，但每当我导航到管理面板时，它就会显示错误“Posts matching query note exists”

让我知道您希望看到代码的哪一部分（我不知道哪个文件有错误）

错误：

Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/admin

Django Version: 2.0.5
Python Version: 3.6.5
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'posts']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']

  Traceback:

File "C:\Users\Fruity_Dude\AppData\Local\Programs\Python\Python36\lib\site- 
  packages\django\core\handlers\exception.py" in inner
  35.             response = get_response(request)
File "C:\Users\Fruity_Dude\AppData\Local\Programs\Python\Python36\lib\site- 
  packages\django\core\handlers\base.py" in _get_response
  128.                 response = self.process_exception_by_middleware(e, 
  request)
File "C:\Users\Fruity_Dude\AppData\Local\Programs\Python\Python36\lib\site- 
  packages\django\core\handlers\base.py" in _get_response
  126.                 response = wrapped_callback(request, *callback_args, 
  **callback_kwargs)
File "C:\Users\Fruity_Dude\Projects\Django\devflow\posts\views.py" in 
  post_details
  10.   posts = Posts.objects.get(slug=slug)
File "C:\Users\Fruity_Dude\AppData\Local\Programs\Python\Python36\lib\site- 
  packages\django\db\models\manager.py" in manager_method
  82.                 return getattr(self.get_queryset(), name)(*args, 
  **kwargs)
File "C:\Users\Fruity_Dude\AppData\Local\Programs\Python\Python36\lib\site- 
  packages\django\db\models\query.py" in get
  403.                 self.model._meta.object_name
Exception Type: DoesNotExist at /admin
Exception Value: Posts matching query does not exist.

URL.py：

from django.urls import path
from . import views

app_name = 'posts'

urlpatterns = [
    path('', views.posts, name='home'),
    path('<slug:slug>', views.post_details, name='detail'),
]

mainurl.py：

from django.contrib import admin
from django.urls import path,include
from . import views
from django.contrib.staticfiles.urls import staticfiles_urlpatterns
from django.conf.urls.static import static
from django.conf import settings

urlpatterns = [
    path('admin/', admin.site.urls), #for admin
    path('', include('posts.urls')),
    path('about/', views.about, name='about'), #for about
    path('contact/', views.contact, name='contact'), #for contact
    path('support/', views.support, name='support'), #for support
    path('donate/', views.donate, name='donate') #for donate
]

urlpatterns += staticfiles_urlpatterns()
urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

---

问题似乎是你在跑步

posts = Posts.objects.get(slug=slug)

你的url会被捕获

path('<slug:slug>', views.post_details, name='detail')

修正了这个问题。这可能是因为后面的

/

现在不包括在生成的

slug

变量中

Posts.objects.get（slug=slug）

会引发此错误，因为

.get

-方法要求匹配一行且仅匹配一行。（）

为了避免这个问题，我认为应该实施两种解决方案

将匹配更改为

路径（'/'，views.post_details，name='detail'）

，即添加了一个

/

使用过滤方法 例如：

posts = Posts.objects.filter(slug=slug).all()  # all() to make django perform the sql select command and return list
if not posts:
    # handle error case, either return 404 or redirect somewhere. 
elif len(posts) > 1:
    # handle the weird case when there was more than one matching post
post = posts[0]
# render using post instead of posts, since it is only one post

---

您需要显示您的URL.py。post_details视图正在捕获您的管理路径，下次，请单击“切换到复制和粘贴视图”并发布错误文本，而不是发布屏幕截图。明白了，谢谢。我要编辑这篇文章@DanielRosemanNo这是您需要显示的主要URL。哦，主要URL！对不起，这可能是问题所在。那么，我还能做些什么来代替

Posts.objects.get（slug=slug）

。我添加了一些建议

url(r'^(?P<slug>[\w-]+)/$', views.post_details, name='detail')

posts = Posts.objects.filter(slug=slug).all()  # all() to make django perform the sql select command and return list
if not posts:
    # handle error case, either return 404 or redirect somewhere. 
elif len(posts) > 1:
    # handle the weird case when there was more than one matching post
post = posts[0]
# render using post instead of posts, since it is only one post