找不到页面 404 错误 - Slug id 未显示（找到）：http://127.0.0.1:8000/postscommentapp/6/how-learn-anything-very-easil
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【中文标题】找不到页面 404 错误 - Slug id 未显示（找到）：http://127.0.0.1:8000/postscommentapp/6/how-learn-anything-very-easily【英文标题】：Page not foung 404 error - Slug id not displaying (found) : http://127.0.0.1:8000/postscommentapp/6/how-learn-anything-very-easily 【发布时间】：2021-06-13 11:37:38 【问题描述】：先生，我正在用 Django 开发一个 slug 项目。当我尝试打印 slug id 帖子时，它不会显示 404 错误。试了n次。任何人，请帮我在 urls.py 中解决这个问题。
找不到页面 (404) 请求方法：GET 请求网址：http://127.0.0.1:8000/postscommentapp/6/how-learn-anything-very-easily 使用 postcommentpro.urls 中定义的 URLconf，Django 按以下顺序尝试了这些 URL 模式：
管理员/ postcommentapp/(?P\d+)/(?P[\w-]+)/$ [name='post_detail'] 当前路径，postscommentapp/6/how-learn-anything-very-easily，与其中任何一个都不匹配。
models.py
from django.db import models
from django.contrib.auth.models import User
# Create your models here.
class Post(models.Model):
STATUS_CHOICES = (
('draft', 'draft'),
('published', 'published')
)
title = models.CharField(max_length=50)
slug = models.CharField(max_length=50)
author = models.ForeignKey(User, on_delete = models.CASCADE)
body = models.TextField()
created = models.DateTimeField(auto_now_add=True)
updated = models.DateTimeField(auto_now=True)
status = models.CharField(max_length=20, choices=STATUS_CHOICES, default='draft')
def __str__(self):
return self.title
admin.py
from django.contrib import admin
from .models import Post
# Register your models here.
class AdminPost(admin.ModelAdmin):
list_display = ['title', 'slug', 'body', 'author', 'created', 'updated', 'status']
prepopulated_fields = 'slug':('title',)
list_editable = ('status',)
admin.site.register(Post, AdminPost)
views.py
from django.shortcuts import render
from .models import Post
# Create your views here.
def post_List(request):
posts = Post.objects.all()
return render(request, 'postscommentapp/post_list.html', 'posts':posts)
def post_detail(request, id, slug):
post = Post.objects.get(id=id)
return render(request, 'postscommentapp/post_detail.html', 'post':post)
url.py - 帖子评论应用
from django.urls import path
from postscommentapp import views
urlpatterns = [
path('', views.post_List, name=''),
path('postscommentapp/(?P<id>\d+)/(?P<slug>[\w-]+)/$', views.post_detail, name='post_detail'),
]
urls.py
"""postscommentpro URL Configuration
The `urlpatterns` list routes URLs to views. For more information please see:
https://docs.djangoproject.com/en/3.1/topics/http/urls/
Examples:
Function views
1. Add an import: from my_app import views
2. Add a URL to urlpatterns: path('', views.home, name='home')
Class-based views
1. Add an import: from other_app.views import Home
2. Add a URL to urlpatterns: path('', Home.as_view(), name='home')
Including another URLconf
1. Import the include() function: from django.urls import include, path
2. Add a URL to urlpatterns: path('blog/', include('blog.urls'))
"""
from django.contrib import admin
from django.urls import path, include
urlpatterns = [
path('admin/', admin.site.urls),
path('', include('postscommentapp.urls')),
]
post_detail.html
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<h2> post.title </h2>
</body>
</html>
post_list.html
<!DOCTYPE html>
<html>
<head>
<title></title>
<!-- Bootstrap CDN Lines -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
<link href="https://fonts.googleapis.com/css2?family=Poppins&display=swap" rel="stylesheet">
<link href="https://fonts.googleapis.com/css2?family=Poppins:wght@600;700&display=swap" rel="stylesheet">
</head>
<style>
.col-md-6
text-align: justify;
.img-thumbnail
border:1px solid #6b6b47;
.title
font-family: 'Poppins', sans-serif;
</style>
<body style="font-family: 'Poppins', sans-serif;">
<div class="container-fluid">
<br>
<h2 class="text-center" style="font-weight:bold; color: #0040ff;">Post Comments Python/Django Project:</h2>
<div class="row">
% for each_item in posts %
<div class="col-md-6">
<br>
<div class="img-thumbnail">
⭐ <a href="#" class="title"> each_item.title </a><small style="float:right"> each_item.created </small><br>
➟ Author: each_item.author <br><br>
each_item.body <br>
</div>
<br>
</div>
% endfor %
</div>
</div>
</body>
</html>
【问题讨论】：
在 URL 的末尾添加一个斜线`/。
在 URL 末尾尝试了 /。但是，找不到显示的 slug id 帖子页面。再次找不到相同的错误页面。 @WillemVanOnsem 先生。
【参考方案1】：
我以自己的方式解决了这个错误。在 urls.py 帖子评论应用中
from django.urls import path
from postscommentapp import views
urlpatterns = [
path('', views.post_List, name=''),
path('postscommentapp/(?P<id>\d+)/(?P<slug>[\w-]+)/$', views.post_detail, name='post_detail'),
]
将此 url 代码更改为此 urls.py - postcommentapp
from django.urls import path
from postscommentapp import views
urlpatterns = [
path('', views.post_List, name=''),
path('post/<int:id>/<slug:slug>/', views.post_detail, name='post_detail'),
]
在views.py中写下这一行
from django.shortcuts import render, get_object_or_404
from .models import Post
# Create your views here.
def post_List(request):
posts = Post.objects.all()
return render(request, 'postscommentapp/post_list.html', 'posts':posts)
def post_detail(request, id, slug):
# post = Post.objects.get(id=id)
post = get_object_or_404(Post, id=id, slug=slug)
return render(request, 'postscommentapp/post_detail.html', 'post':post)
【讨论】：
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