Django版本：1.11 Python版本：3.6.1 我正在尝试关注Openclassroom（Tuto）上的Django教程，我有一个无法解决的问题，我无法删除此错误
这是追溯：
File "C:\Python36\lib\site-packages\django\core\handlers\exception.py" in inner
41. response = get_response(request)
File "C:\Python36\lib\site-packages\django\core\handlers\base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "C:\Python36\lib\site-packages\django\core\handlers\base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\admin\crepes\blog\views.py" in accueil
15. return render(request, 'blog/accueil.html', {'articles': articles})
File "C:\Python36\lib\site-packages\django\shortcuts.py" in render
30. content = loader.render_to_string(template_name, context, request, using=using)
File "C:\Python36\lib\site-packages\django\template\loader.py" in render_to_string
68. return template.render(context, request)
File "C:\Python36\lib\site-packages\django\template\backends\django.py" in render
66. return self.template.render(context)
File "C:\Python36\lib\site-packages\django\template\base.py" in render
207. return self._render(context)
File "C:\Python36\lib\site-packages\django\template\base.py" in _render
199. return self.nodelist.render(context)
File "C:\Python36\lib\site-packages\django\template\base.py" in render
990. bit = node.render_annotated(context)
File "C:\Python36\lib\site-packages\django\template\base.py" in render_annotated
957. return self.render(context)
File "C:\Python36\lib\site-packages\django\template\loader_tags.py" in render
177. return compiled_parent._render(context)
File "C:\Python36\lib\site-packages\django\template\base.py" in _render
199. return self.nodelist.render(context)
File "C:\Python36\lib\site-packages\django\template\base.py" in render
990. bit = node.render_annotated(context)
File "C:\Python36\lib\site-packages\django\template\base.py" in render_annotated
957. return self.render(context)
File "C:\Python36\lib\site-packages\django\template\loader_tags.py" in render
72. result = block.nodelist.render(context)
File "C:\Python36\lib\site-packages\django\template\base.py" in render
990. bit = node.render_annotated(context)
File "C:\Python36\lib\site-packages\django\template\base.py" in render_annotated
957. return self.render(context)
File "C:\Python36\lib\site-packages\django\template\defaulttags.py" in render
216. nodelist.append(node.render_annotated(context))
File "C:\Python36\lib\site-packages\django\template\base.py" in render_annotated
957. return self.render(context)
File "C:\Python36\lib\site-packages\django\template\defaulttags.py" in render
458. url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
File "C:\Python36\lib\site-packages\django\urls\base.py" in reverse
91. return force_text(iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs)))
File "C:\Python36\lib\site-packages\django\urls\resolvers.py" in _reverse_with_prefix
497. raise NoReverseMatch(msg)
Exception Type: NoReverseMatch at /blog/accueil
Exception Value: Reverse for 'blog_lire' with arguments '('',)' not found. 1 pattern(s) tried: ['blog/(?P<slug>.+)$']
一些代码：
models.py：
from django.db import models
class Article(models.Model):
titre = models.CharField(max_length=100)
slug = models.SlugField()
auteur = models.CharField(max_length=42)
contenu = models.TextField(null=True)
date = models.DateTimeField(verbose_name="Date de parution",
auto_now_add=True, auto_now=False)
is_visible = models.BooleanField(verbose_name="Article publié ?",
default=False)
categorie = models.ForeignKey('Categorie')
def __str__(self):
return self.titre
class Categorie(models.Model):
titre = models.CharField(max_length=100)
def __str__(self):
return self.titre
views.py：
from django.shortcuts import render, get_object_or_404
from .models import Article
def accueil(request):
articles = Article.objects.filter(is_visible=True).order_by('-date')[:4]
return render(request, 'blog/accueil.html', {'articles': articles})
def lire_article(request, slug):
article = get_object_or_404(Article, slug=slug)
return render(request, 'blog/lire_article.html', {'article': article})
博客/ urls.py：
from django.conf.urls import url
from . import views
urlpatterns = [
url(r'^accueil$', views.accueil),
url(r'^(?P<slug>.+)$', views.lire_article, name='blog_lire'),
]
urls.py：
from django.conf.urls import include, url
from django.contrib import admin
from django.conf import settings
urlpatterns = [
url(r'^blog/', include('blog.urls')),
url(r'^admin/', include(admin.site.urls)),
]
accueil.html：
{% extends "blog/base.html" %}
{% block title %}Accueil du blog{% endblock %}
{% block content %}
<h1>Derniers articles</h1>
{% for article in articles %}
<h2 class="titre-article">{{ article.titre }}</h2>
<p class="infos-article">Le {{ article.date|date:'SHORT_DATETIME_FORMAT' }}, XX commentaires.</p>
<div class="contenu-article">
{{ article.contenu|safe|truncatewords_html:30 }}
</div>
<p><a href="{% url 'blog_lire' article.slug %}">Lire la suite</a></p>
<hr />
{% endfor %}
{% endblock %}
base.html文件：
{% extends "blog/base.html" %}
{% block title %}{{ article.titre }}{% endblock %}
{% block content %}
<p>
<a href="{% url 'accueil' %}">Retour à la liste des articles</a>
</p>
<h2 class="titre-article">{{ article.titre }}</h2>
<p class="infos-article">Par {{ article.auteur }}, le {{ article.date }}</p>
<div class="contenu-article">
{{ article.contenu|safe }}
</div>
<h3 class="titre-comments">Commentaires</h3>
<h4>Poster votre propre commentaire</h4>
<form method="post" action="" class="pure-form">
<!-- A vous de remplir le formulaire également -->
<p style="text-align:center">
<input class="pure-button pure-button-primary" type="submit" />
</p>
</form>
<div class="clear"></div>
<div class="commentaire">
<p>Maxime, le 28 mai 2019</p>
<p>Ceci est un exemple de commentaire, qui est à remplacer par votre modèle</p>
</div>
{% endblock %}
答案 0 :(得分：1)
至少有一篇文章有一个空的slu ..
错误显示它正在尝试使用slug找到链接到每篇文章的“blog_lire”页面的正确URL。但它失败了，因为它有一个空字符串，因此它不能生成该链接。
你应该确保你的所有文章都有一个slug字段的值。
答案 1 :(得分：-1)
而不是
{% url 'blog_lire' article.slug %}"
尝试
{% url 'blog:blog_lire' slug=article.slug %}"
或类似的东西