cats() 有一个意外的关键字参数 'pk'

Question

我是一个成熟的django web开发人员。我对Django有一个问题。这个错误是"cats()得到了一个意外的关键字参数'pk'"。请看到我的代码并帮助我。

Request Method: GET
Request URL:    http://127.0.0.1:8000/1
Django Version: 1.6.5
Exception Type: TypeError
Exception Value:    
cats() got an unexpected keyword argument 'pk'
Exception Location: /usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py in get_response, line 112
Python Executable:  /usr/bin/python
Python Version: 2.7.6 

models.py

from django.db import models
from taggit.managers import TaggableManager
class Category(models.Model):
    title = models.CharField(max_length=40)
    def __unicode__(self):
        return self.title
class Post (models.Model):
    title = models.CharField(max_length=150)
    body = models.TextField()
    date = models.DateTimeField()
    tags = TaggableManager ()
    cats = models.ManyToManyField(Category)
    def __unicode__ (self):
        return self.title

urls . py

from django.conf.urls import include, url, patterns
from django.views.generic import ListView, DetailView
from blog.models import Post, Category
urlpatterns = patterns('blog.views',
    url(r'^$',ListView.as_view(
        queryset = Post.objects.all().order_by("-date")[:2],
        template_name="index.html")),       
    url(r'^(?P<pk>d+)$', 'cats', name='cats'),
)

views.py

from blog.models import Post,Category
from django.shortcuts import render_to_response
from django.template import RequestContext
def cats(request):
    queryset = Post.objects.all().order_by("-date")
    navitem = Category.objects.all().order_by("title")
    return render_to_response('post.html',{'queryset':queryset,'navitem':navitem},context_instance=RequestContext(request))

Answer 1

问题在urls.py:

url(r'^(?P<pk>d+)$', 'cats', name='cats')

你正在向视图发送一个它不需要的参数。

可以在视图参数中包含pk参数，如下所示:

def cats(request, pk):

或:

def cats(request, pk=None):

或者，更好的是，您可以在URL中使用不同的模式，而不捕获它(因为您在视图中根本不使用pk值，因此不需要为它创建变量)，如:

url(r'^(d+)$', 'cats', name='cats')