Django 博客教程修改中的 NoReverseMatch 错误

Question

我刚刚完成了一个Django博客的教程，链接在这里：博客教程

现在我想添加一个功能，来统计每篇博客文章的浏览次数。为此，我在views.py文件中添加了以下内容（注意，教程中views.py是完全空的，因为它使用了Django的通用视图）：

def detail_view(request, object_id):
object = Post.objects.filter(id=object_id)
object.update(counter = F('counter') + 1)

return render_to_response('posts/post_detail.html', {'object':object}, context_instance=RequestContext(request))

我不太确定我这样写render_to_response是否正确。我的urls.py现在是：

from models import Post
queryset = {'queryset': Post.objects.order_by('-pub_date')}
urlpatterns = patterns('',
    url('^$', 'django.views.generic.list_detail.object_list', queryset, name="posts"),
    url('^(?P<object_id>\d+)/$', 'posts.views.detail_view', name="post")

我的post_list.html文件中有以下代码，用来创建一个指向post_detail.html的链接：

<a href={% url post object.id %}>{{ object.title }}</a>

而且完整的错误信息是：

> Exception Value:  
Caught NoReverseMatch while rendering: Reverse for 'post' with arguments '('',)' and keyword arguments '{}' not found.

Traceback:

> Environment:


Request Method: GET
Request URL: localhost:8000/1/

Django Version: 1.3
Python Version: 2.6.1
Installed Applications:
['django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.comments',
 'django.contrib.admin',
 'Blog.posts',
 'Blog.categories']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.middleware.csrf.CsrfResponseMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware')


Template error:
In template /Users/kevin/PycharmProjects/Blog/templates/posts/_post.html, error at line 3
   Caught NoReverseMatch while rendering: Reverse for 'post' with arguments '('',)' and keyword arguments '{}' not found.
   1 : <div id=”object_{{ object.id }}”>


   2 : <h2>


   3 :     <a href= {% url post object.id %} >{{ object.title }}</a>


   4 :     <small>{{ object.pub_date|timesince }} ago</small>


   5 :     </h2>


   6 :     {{ object.body }}


   7 : </div>

Traceback:
File "/Library/Python/2.6/site-packages/django/core/handlers/base.py" in get_response
  111.                         response = callback(request, *callback_args, **callback_kwargs)
File "/Users/kevin/PycharmProjects/Blog/posts/views.py" in detail_view
  12.     return render_to_response('posts/post_detail.html', {'object':object}, context_instance=RequestContext(request))
File "/Library/Python/2.6/site-packages/django/shortcuts/__init__.py" in render_to_response
  20.     return HttpResponse(loader.render_to_string(*args, **kwargs), **httpresponse_kwargs)
File "/Library/Python/2.6/site-packages/django/template/loader.py" in render_to_string
  188.         return t.render(context_instance)
File "/Library/Python/2.6/site-packages/django/template/base.py" in render
  123.             return self._render(context)
File "/Library/Python/2.6/site-packages/django/template/base.py" in _render
  117.         return self.nodelist.render(context)
File "/Library/Python/2.6/site-packages/django/template/base.py" in render
  744.                 bits.append(self.render_node(node, context))
File "/Library/Python/2.6/site-packages/django/template/debug.py" in render_node
  73.             result = node.render(context)
File "/Library/Python/2.6/site-packages/django/template/loader_tags.py" in render
  127.         return compiled_parent._render(context)
File "/Library/Python/2.6/site-packages/django/template/base.py" in _render
  117.         return self.nodelist.render(context)
File "/Library/Python/2.6/site-packages/django/template/base.py" in render
  744.                 bits.append(self.render_node(node, context))
File "/Library/Python/2.6/site-packages/django/template/debug.py" in render_node
  73.             result = node.render(context)
File "/Library/Python/2.6/site-packages/django/template/loader_tags.py" in render
  64.             result = block.nodelist.render(context)
File "/Library/Python/2.6/site-packages/django/template/base.py" in render
  744.                 bits.append(self.render_node(node, context))
File "/Library/Python/2.6/site-packages/django/template/debug.py" in render_node
  73.             result = node.render(context)
File "/Library/Python/2.6/site-packages/django/template/loader_tags.py" in render
  159.         return self.render_template(self.template, context)
File "/Library/Python/2.6/site-packages/django/template/loader_tags.py" in render_template
  141.         output = template.render(context)
File "/Library/Python/2.6/site-packages/django/template/base.py" in render
  123.             return self._render(context)
File "/Library/Python/2.6/site-packages/django/template/base.py" in _render
  117.         return self.nodelist.render(context)
File "/Library/Python/2.6/site-packages/django/template/base.py" in render
  744.                 bits.append(self.render_node(node, context))
File "/Library/Python/2.6/site-packages/django/template/debug.py" in render_node
  73.             result = node.render(context)
File "/Library/Python/2.6/site-packages/django/template/defaulttags.py" in render
  450.                         raise e

Exception Type: TemplateSyntaxError at /1/
Exception Value: Caught NoReverseMatch while rendering: Reverse for 'post' with arguments '('',)' and keyword arguments '{}' not found.

我已经花了几个小时试图找出问题所在，但仍然没有找到答案。我在SO.com上也看了很多相关内容，但还是没有运气。

非常感谢你的帮助。

谢谢！

django web开发错误调试 urls.py views.py noreversematch post_list.html post_detail.html

Django 博客教程修改中的 NoReverseMatch 错误

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