找不到具有参数'(9，)‘和关键字参数'{}’的'edit‘的反向。0个模式已尝试：[]

Question

当我尝试访问django中的编辑链接时，我得到了一个错误，我已经在堆栈溢出上找到了这里，但我还没有找到适合我的解决方案。

错误:异常类型: NoReverseMatch异常值:找不到参数为'(9，)‘和关键字参数为'{}’的'edit‘的反向。尝试了0个模式:找不到[]个参数'{}‘。0个模式已尝试：[]

这是我的urls.py

from django.conf.urls import url, include
from django.contrib import admin
from posts import views

urlpatterns = [
    url(r'^$', views.index, name='index'),
    url(r'^create/$', views.create, name='create'),
    url(r'^(?P<id>\d+)/$', views.show_post, name = 'show_post'),
    url(r'^(?P<id>\d+)/edit/$', views.update_post, name = 'update_post'),
    url(r'^(?P<id>\d+)/delete/$', views.delete_post),
]

views.py

from django.contrib import messages
from django.shortcuts import render, get_object_or_404, redirect
from django.http import HttpResponse, HttpResponseRedirect

from .forms import PostForm
from .models import Post

# Create your views here.

def index(request):
    post_list = Post.objects.order_by('-created_date')[:10]
    context = {'post_list': post_list}
    return render(request, 'index.html', context)

def create(request):
    form = PostForm(request.POST or None)
    if form.is_valid():
        instance = form.save(commit=False)
        instance.save()
        #flass messages
        messages.success(request, "Successfully created")
        return HttpResponseRedirect(instance.get_absolute_url())


    context = {
        "form":form,
    }
    return render(request, 'post_form.html', context)   


def show_post(request, id=None):
    instance = get_object_or_404(Post, id=id)
    context = {'instance': instance}
    return render(request, 'show_post.html', context)


def update_post(request, id=None):
    instance = get_object_or_404(Post, id=id)
    form = PostForm(request.POST or None, instance=instance)
    if form.is_valid():
        instance = form.save(commit=False)
        instance.save()
        messages.success(request, "Post updated")
        return HttpResponseRedirect(instance.get_absolute_url())
    context = {
        "form":form,
        "instance":instance
    }
    return render(request, 'post_form.html', context)


def delete_post(request, id=None):
    instance = get_object_or_404(Post, id=id)
    instance.delete()
    messages.success(request, "Successfully deleted")
    return redirect("posts:index")

show_post.html

{% extends "base.html" %}

<div class="container">
{% block content  %}
    <h1> {{instance.title}} </h1>
    <h3>{{instance.content| linebreaks}} </h3>
    <a href="{% url 'posts:index' %}"> Home</a> | <a href="{{instance.url}}" target="_blank" > visit url</a> | 
    <a href="{% url 'posts:update_post' %}"> Edit</a> 

{% endblock %}

</div>

Answer 1

您需要使用命名空间。您应该使用'posts:edit'，而不是'edit'。

或者'posts:update_post'，这取决于您在urls.py中使用的名称。