[英]NoReverseMatch at / Reverse for 'post_detail' not found
I'm developing a simple blog with Python and Django.我正在用 Python 和 Django 开发一个简单的博客。 On my home page, I display the 3 latest posts and then all the posts.
在我的主页上,我显示 3 个最新帖子,然后是所有帖子。 At this point my blog is working.
在这一点上,我的博客正在运行。 But I added a link "Show more" or "Show article" to display the post alone in a new page but I get the following error when I load the page:
但是我添加了一个链接“显示更多”或“显示文章”以在新页面中单独显示帖子,但在加载页面时出现以下错误:
NoReverseMatch at / Reverse for 'post_detail' with keyword arguments '{'pk': ''}' not found.
NoReverseMatch at / Reverse for 'post_detail' 关键字参数为 '{'pk': ''}' 未找到。 1 pattern(s) tried: ['post/(?P[0-9]+)/$']
尝试了 1 个模式:['post/(?P[0-9]+)/$']
PS: I'm following this tutorial in french (this one is in English but it is a bit different in english here . And please note that I'm juste starting Python and Django :) PS:我正在关注这个法语教程(这个是英文的,但这里的英文有点不同。请注意,我只是开始使用 Python 和 Django :)
So here is my code:所以这是我的代码:
{% extends 'blog/base.html' %}
{% block latestsnews %}
{% for latest in latests %}
<article class="lastnews">
<h4>{{ latest.title }}</h4>
<h5 class="lastestcategory">{{ latest.category }}</h5>
<p class="bodysmall">{{ latest.text|truncatewords:10 }}</p>
<div>
<p class="date">{{ latest.published_date }}</p>
<p class="showmore"><a href="{% url 'post_detail' pk=post.pk %}">Show more</a></p>
</div>
</article>
{% endfor %}
{% endblock %}
{% block posts %}
{% for post in posts %}
<article class="post">
<header class="postheader">
<h4>{{ post.title }}</h4>
<p class="info">{{ post.category }}, {{ post.published_date }}</p>
</header>
<p class="bodyregular">{{ post.text|linebreaksbr }}</p>
<footer class="postfooter">
<p class="author">Author: {{ post.author }}</p>
<p class="showarticle"><a href="{% url 'post_detail' pk=post.pk %}">Show article</a></p>
</footer>
</article>
{% endfor %}
{% endblock %}
from django.shortcuts import render
from django.utils import timezone
from .models import Category, Post
from django.shortcuts import render, get_object_or_404
def category_list(request):
categories = Category.objects.all()
return render (request, 'blog/post_list.html', {'categories': categories})
def post_list(request):
posts = Post.objects.filter(published_date__lte=timezone.now()).order_by('published_date')
latests = Post.objects.filter(published_date__lte=timezone.now()).reverse()[:3]
return render(request, 'blog/post_list.html', {'posts': posts, 'latests': latests})
def post_detail(request, pk):
post = get_object_or_404(Post, pk=pk)
return render(request, 'blog/post_detail.html', {'post': post})
from django.conf.urls import url
from . import views
urlpatterns = [
url(r'^$', views.post_list, name='post_list'),
url(r'^post/(?P<pk>[0-9]+)/$', views.post_detail, name='post_detail'),
]
{% url 'post_detail' pk=post.pk %} , on template {% url 'post_detail' pk=post.pk %} ,在模板上
from django.shortcuts import render, get_object_or_404 , on views从 django.shortcuts 导入渲染,get_object_or_404 ,在视图上
**def post_detail(request, pk): **定义 post_detail(请求,pk):
post = get_object_or_404(Post, pk=pk) post = get_object_or_404(post, pk=pk)
return render(request, 'blog/post_detail.html', {'post': post})**, on views return render(request, 'blog/post_detail.html', {'post': post})**, 在视图上
url(r'^post/(?P[0-9]+)/$', views.post_detail, name='post_detail'), on urls url(r'^post/(?P[0-9]+)/$', views.post_detail, name='post_detail'),在 urls
Thanks in advance !提前致谢 !
In your template you write:在你的模板中你写:
{% for latest in latests %}
<!-- ... -->
<p class="showmore"><a href="{% url 'post_detail' pk=post.pk %}">Show more</a></p>
<!-- ... -->
{% endfor %}
But the first occurance is before the {% for post in posts %}
loop, at that moment there is no post
variable, there is however a latest
variable (since it is located in the {% for latest in latests %}
loop), so you might want to replace it with:但是,第一次出现是在之前
{% for post in posts %}
循环,在那一刻有没有post
变,也不过是一个latest
变化(因为它位于{% for latest in latests %}
循环)所以你可能想把它替换为:
<p class="showmore"><a href="{% url 'post_detail' pk=
latest.pk %}">Show more</a></p>
if its a heroku web app, run heroku run python manage.py createsuperuser then add a post, if its a local project just run python manage.py createsuperuser and add a post如果它是一个 heroku web 应用程序,运行 heroku run python manage.py createsuperuser 然后添加一个帖子,如果它是一个本地项目,只需运行 python manage.py createsuperuser 并添加一个帖子
just go to your admin and add those things只需转到您的管理员并添加这些内容
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