TypeError:post（）缺少1个必需的位置参数：“slug”

Question

我对Django很陌生，所以我很自然地遇到了麻烦。我在尝试创建博客页面时收到此错误消息。我试着去了解我犯的错误，但没有结果。

完全错误：

TypeError at /blog/
post() missing 1 required positional argument: 'slug'
Request Method: GET
Request URL:    http://127.0.0.1:8000/blog/
Django Version: 1.9.2
Exception Type: TypeError
Exception Value:    
post() missing 1 required positional argument: 'slug'
Exception Location: /usr/lib/python3.4/site-packages/django/core/handlers/base.py in get_response, line 147
Python Executable:  /usr/bin/python3.4
Python Version: 3.4.3
Python Path:    
['/home/rumen/Desktop/venv2/blog_project',
 '/usr/lib/python3.4',
 '/usr/lib/python3.4/plat-x86_64-linux-gnu',
 '/usr/lib/python3.4/lib-dynload',
 '/usr/lib/python3.4/site-packages',
 '/usr/local/lib/python3.4/dist-packages',
 '/usr/lib/python3/dist-packages']

下面是我的模型：

from django.db import models
from django import forms
from django.core.urlresolvers import reverse

class Post(models.Model):
    title = models.CharField(max_length=255)
    slug = models.SlugField(unique=True, max_length=255)
    description = models.CharField(max_length=255)
    content = models.TextField()
    published = models.BooleanField(default=True)
    created = models.DateTimeField(auto_now_add=True)

    class Meta:
        ordering = ['-created']

    def __unicode__(self):
        return u'%s' % self.title

    def get_absolute_url(self):
        return reverse('blog.views.post', args=[self.slug])

后视图：

{% block title %}{{post.title}}{% endblock %}

{% block content_blog %}
<article>
    <header>
        <h1> {{post.title}} </h1>
        <p>
            Posted on
            <time datetime="{{post.created|date:"c"}}">
            {{post.created|date}}
            </time>
        </p>
    </header>
    <p class="description">
        {{post.description}}
    </p>
    {{post.content|safe}}
</article>
{% endblock %}

Url模式：

urlpatterns = [
    url(r'^blog/$', 'blog.views.post', name='blogpage'),
    url(r'^(?P<slug>[\w\-]+)/$', 'blog.views.post'),
]

视图：

from django.conf import settings
from django.shortcuts import render, get_object_or_404
from blog.models import Post
from .forms import ContactForm
from django.core.mail import send_mail

def index(request):
    posts = Post.objects.filter(published=True)
    return render(request, 'blog/index.html', {'posts': posts})

def post(request, slug):
    post = get_object_or_404(Post, slug=slug)
    return render(request, 'blog/post.html', {'post': post})

def contact(request):
    form = ContactForm(request.POST or None)
    if form.is_valid():
        form_email = form.cleaned_data.get("email")
        form_message = form.cleaned_data.get("message")
        form_full_name = form.cleaned_data.get("full_name")
        subject = 'Site contact form'
        from_email = settings.EMAIL_HOST_USER
        to_email = [from_email, '#']
        contact_message = "%s: %s via %s"%(
            form_full_name, 
            form_message, 
            form_email)

        send_mail(subject, 
                contact_message, 
                from_email, 
                to_email, 
                fail_silently=False)

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

不知道还有什么我需要张贴给你们更多的细节。

我在ubuntu 14.04上使用python 3.4.1和django 1.9。