【发布时间】：2021-05-03 14:28:45
【问题描述】：
从错误消息看来，我需要一个字典变量： {'slug': ''}' 。即使这个假设是正确的，我也不确定正在寻找什么变量或在哪里寻找。其他可能相关的数据：这基于https://tutorial.djangogirls.org/en/。还尝试包含基于https://djangocentral.com/creating-comments-system-with-django/ 的cmets 和基于https://medium.com/tech-insights/how-to-create-django-seo-friendly-url-using-slugs-fa2bbc098690 的slug。迄今为止的代码：
模型.py
from django.conf import settings
from django.db import models
from django.utils import timezone
from django.contrib.auth.models import User
from django.urls import reverse
from django.utils.text import slugify
class PageSubject(models.Model):
page_subject = models.CharField(max_length=200)
class Meta:
# Gives the proper plural name for class called subject
verbose_name_plural = "Subjects"
def __str__(self):
return self.page_subject
class Post(models.Model):
author = models.ForeignKey(User, default=1, on_delete=models.SET_DEFAULT, related_name='blog_posts')
date_added = models.DateTimeField(auto_now_add=True)
page_subject = models.ForeignKey(PageSubject, verbose_name='PageSubject', default=1, on_delete=models.SET_DEFAULT)
slug = models.SlugField(default='', editable=False, max_length=200, null = False)
title = models.CharField(max_length=200, unique=True)
content = models.TextField()
def get_absolute_url(self):
kwargs = {
'slug': self.slug
}
return reverse('post_detail', kwargs=kwargs)
def save(self, *args, **kwargs):
value = self.title
self.slug = slugify(value, allow_unicode=True)
super().save(*args, **kwargs)
class Meta:
ordering = ['-date_added']
def __str__(self):
return self.title
class Comment(models.Model):
post = models.ForeignKey(Post, default=1, on_delete=models.SET_DEFAULT, related_name='comments')
name = models.CharField(max_length=80)
email = models.EmailField()
body = models.TextField()
made_on = models.DateTimeField(auto_now_add=True)
active = models.BooleanField(default=False)
class Meta:
ordering = ['made_on']
def __str__(self):
return 'Comment {} by {}'.format(self.body, self.name)
urls.py
from django.urls import path
from . import views
urlpatterns = [
path('', views.index, name='index'),
path('<slug:slug>/', views.post_detail, name='post_detail'),
path('post/new/', views.post_new, name='post_new'),
]
views.py
from django.shortcuts import render, get_object_or_404, redirect
from django.utils import timezone
from django.views import generic
from .models import Post
from .forms import PostForm
Reverse for 'post_detail' with keyword arguments '{'slug': ''}' not found. 1 pattern(s) tried: ['(?P<slug>[-a-zA-Z0-9_]+)/$']
# Create your views here.
def index(request):
posts = Post.objects.filter(date_added__lte=timezone.now()).order_by('-date_added')
return render(request, 'blog/index.html', {'posts': posts})
def post_detail(request, slug):
post = get_object_or_404(Post, slug=slug)
return render(request, 'blog/post_detail.html', {'post': post})
def post_new(request):
if request.method == "POST":
form = PostForm(request.POST)
if form.is_valid():
post = form.save(commit=False)
post.author = request.user
post.date_added = timezone.now()
post.save()
return redirect('post_detail', slug=slug)
else:
form = PostForm()
return render(request, 'blog/post_edit.html', {'form': form})
urls.py
from django.urls import path
from . import views
urlpatterns = [
path('', views.index, name='index'),
path('<slug:slug>/', views.post_detail, name='post_detail'),
path('post/new/', views.post_new, name='post_new'),
]
base.html
{% load static %}
<html>
<head>
<title>drsmart.info</title>
</head>
<body>
<h1>DR SMART.INFO</h1>
<p>the web site for the analytical rugby fan</p>
{% block content %}
{% endblock %}
</body>
</html>
index.html
{% extends 'blog/base.html' %}
{% block content %}
{% for post in posts %}
<div>
<h2><a href="{% url 'post_detail' slug=post.slug %}">{{ post.title }}</a></h2>
<p>author: {{post.author}}, published: {{post.date_added }}</p>
<p>{{ post.content|linebreaksbr }}</p>
</div>
{% endfor %}
{% endblock %}
post_detail.html
{% extends 'blog/base.html' %}
{% block content %}
<div class="post">
{% if post.date_added %}
<div class="date">
{{ post.date_added }}
</div>
{% endif %}
<h2>{{ post.title }}</h2>
<p>{{ post.content|linebreaksbr }}</p>
</div>{% extends 'blog/base.html' %}
{% block content %}
<div class="post">
{% if post.date_added %}
<div class="date">
{{ post.date_added }}
</div>
{% endif %}
<h2>{{ post.title }}</h2>
<p>{{ post.content|linebreaksbr }}</p>
</div>
{% endblock %}
{% endblock %}
经过长时间的努力，我们将不胜感激您提出的改进建议，Roderic。
【问题讨论】：
-
你希望如何以空字符串作为 slug 路由到任何地方？
-
您对 slug 的默认设置没有帮助，并且与正则表达式不匹配。
-
谢谢阿卜杜勒，在哪里？
-
克劳斯什么是“正则表达式”？
-
@Roderic as Klaus D. 提到您已将 slugfield 的默认值设置为空字符串。当然，它与正则表达式
[-a-zA-Z0-9_]+不匹配。
标签： python django url blogs slug