get_absolute_url不working-版本1.4.3

Question

我試着去我的對象中使用get_absolute_url的方法，但同時林引用它，它失敗了， 我已經給下面

models.py所有代碼

from django.db import models 

class Category(models.Model): 
    name = models.CharField(max_length=50) 
    slug = models.SlugField(max_length=50,unique=True,help_text='Unique value for product page URL created from name') 
    description = models.TextField() 
    is_active = models.BooleanField(default=True) 
    meta_keywords = models.CharField("Meta Keywords",max_length=255,help_text="comma-delimited set of SEO Keywords for meta tag") 
    meta_description = models.CharField("Meta description",max_length=255,help_text="Content for description meta tag") 
    created_at = models.DateTimeField(auto_now_add=True) 
    updated_at = models.DateTimeField(auto_now_add=True) 

    class Meta: 
     db_table = 'categories' 
     ordering = ['-created_at'] 
     verbose_name_plural = 'Categories' 

    def __unicode__(self): 
     return self.name 

    @models.permalink 
    def get_absolute_url(self): 
     return ('catalog_category',(),{'category_slug':self.slug}) 

context_processor.py

from ecomstore.catalog.models import Category 
from ecomstore import settings 

def ecomstore(request): 
    return {'active_categories':Category.objects.filter(is_active=True), 
      'site_name':settings.SITE_NAME, 
      'meta_keywords':settings.META_KEYWORDS, 
      'meta_description':settings.META_DESCRIPTION, 
      'request':request} 

category_list.html

<h3>Categorie</h3> 

{% for c in active_categories %} 
    <a href="{{ c.name }}">{{c.name}}</a><br/> 
    <a href="{{ c.get_absolute_url }}" class="category">{{ c.name }}</a><br /> 
{% endfor %} 

錯誤：

Environment: 


Request Method: GET 
Request URL: http://127.0.0.1:8000/ 

Django Version: 1.4.3 
Python Version: 2.7.3 
Installed Applications: 
('django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.sites', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'ecomstore.catalog', 
'ecomstore.utils', 
'django.contrib.admin') 
Installed Middleware: 
('django.middleware.common.CommonMiddleware', 
'django.contrib.sessions.middleware.SessionMiddleware', 
'django.middleware.csrf.CsrfViewMiddleware', 
'django.contrib.auth.middleware.AuthenticationMiddleware', 
'django.contrib.messages.middleware.MessageMiddleware') 


Template error: 
In template C:\python27\django-projects\ecomstore\ecomstore\preview\templates\tags\category_list.html, error at line 5 
    unexpected end of pattern 
    1 : <h3>Categorie</h3> 


    2 : {{active_categories}} 


    3 : {% for c in active_categories %} 


    4 : <a href="{{ c.name }}">{{c.name}}</a><br/> 


    5 : <a href=" {{ c.get_absolute_url }} " class="category">{{ c.name }}</a><br /> 


    6 : {% endfor %} 


    7 : 

Traceback: 
File "c:\python27\lib\site-packages\django\core\handlers\base.py" in get_response 
    111.       response = callback(request, *callback_args, **callback_kwargs) 
File "C:\Python27\Django-projects\ecomstore\ecomstore\catalog\views.py" in index 
    8.  return render_to_response(template_name,locals(),context_instance=RequestContext(request)) 
File "c:\python27\lib\site-packages\django\shortcuts\__init__.py" in render_to_response 
    20.  return HttpResponse(loader.render_to_string(*args, **kwargs), **httpresponse_kwargs) 
File "c:\python27\lib\site-packages\django\template\loader.py" in render_to_string 
    176.   return t.render(context_instance) 
File "c:\python27\lib\site-packages\django\template\base.py" in render 
    140.    return self._render(context) 
File "c:\python27\lib\site-packages\django\template\base.py" in _render 
    134.   return self.nodelist.render(context) 
File "c:\python27\lib\site-packages\django\template\base.py" in render 
    823.     bit = self.render_node(node, context) 
File "c:\python27\lib\site-packages\django\template\debug.py" in render_node 
    74.    return node.render(context) 
File "c:\python27\lib\site-packages\django\template\loader_tags.py" in render 
    123.   return compiled_parent._render(context) 
File "c:\python27\lib\site-packages\django\template\base.py" in _render 
    134.   return self.nodelist.render(context) 
File "c:\python27\lib\site-packages\django\template\base.py" in render 
    823.     bit = self.render_node(node, context) 
File "c:\python27\lib\site-packages\django\template\debug.py" in render_node 
    74.    return node.render(context) 
File "c:\python27\lib\site-packages\django\template\loader_tags.py" in render 
    123.   return compiled_parent._render(context) 
File "c:\python27\lib\site-packages\django\template\base.py" in _render 
    134.   return self.nodelist.render(context) 
File "c:\python27\lib\site-packages\django\template\base.py" in render 
    823.     bit = self.render_node(node, context) 
File "c:\python27\lib\site-packages\django\template\debug.py" in render_node 
    74.    return node.render(context) 
File "c:\python27\lib\site-packages\django\template\loader_tags.py" in render 
    62.    result = block.nodelist.render(context) 
File "c:\python27\lib\site-packages\django\template\base.py" in render 
    823.     bit = self.render_node(node, context) 
File "c:\python27\lib\site-packages\django\template\debug.py" in render_node 
    74.    return node.render(context) 
File "c:\python27\lib\site-packages\django\template\loader_tags.py" in render 
    155.   return self.render_template(self.template, context) 
File "c:\python27\lib\site-packages\django\template\loader_tags.py" in render_template 
    137.   output = template.render(context) 
File "c:\python27\lib\site-packages\django\template\base.py" in render 
    140.    return self._render(context) 
File "c:\python27\lib\site-packages\django\template\base.py" in _render 
    134.   return self.nodelist.render(context) 
File "c:\python27\lib\site-packages\django\template\base.py" in render 
    823.     bit = self.render_node(node, context) 
File "c:\python27\lib\site-packages\django\template\debug.py" in render_node 
    74.    return node.render(context) 
File "c:\python27\lib\site-packages\django\template\defaulttags.py" in render 
    185.       nodelist.append(node.render(context)) 
File "c:\python27\lib\site-packages\django\template\debug.py" in render 
    84.    output = self.filter_expression.resolve(context) 
File "c:\python27\lib\site-packages\django\template\base.py" in resolve 
    571.     obj = self.var.resolve(context) 
File "c:\python27\lib\site-packages\django\template\base.py" in resolve 
    721.    value = self._resolve_lookup(context) 
File "c:\python27\lib\site-packages\django\template\base.py" in _resolve_lookup 
    772.        current = current() 
File "c:\python27\lib\site-packages\django\utils\functional.py" in _curried 
    11.   return _curried_func(*(args+moreargs), **dict(kwargs, **morekwargs)) 
File "c:\python27\lib\site-packages\django\db\models\base.py" in get_absolute_url 
    883.  return settings.ABSOLUTE_URL_OVERRIDES.get('%s.%s' % (opts.app_label, opts.module_name), func)(self, *args, **kwargs) 
File "c:\python27\lib\site-packages\django\db\models\__init__.py" in inner 
    35.   return reverse(bits[0], None, *bits[1:3]) 
File "c:\python27\lib\site-packages\django\core\urlresolvers.py" in reverse 
    476.  return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs)) 
File "c:\python27\lib\site-packages\django\core\urlresolvers.py" in _reverse_with_prefix 
    363.   possibilities = self.reverse_dict.getlist(lookup_view) 
File "c:\python27\lib\site-packages\django\core\urlresolvers.py" in reverse_dict 
    276.    self._populate() 
File "c:\python27\lib\site-packages\django\core\urlresolvers.py" in _populate 
    253.      for name in pattern.reverse_dict: 
File "c:\python27\lib\site-packages\django\core\urlresolvers.py" in reverse_dict 
    276.    self._populate() 
File "c:\python27\lib\site-packages\django\core\urlresolvers.py" in _populate 
    243.    p_pattern = pattern.regex.pattern 
File "c:\python27\lib\site-packages\django\core\urlresolvers.py" in regex 
    162.     compiled_regex = re.compile(self._regex, re.UNICODE) 
File "c:\python27\lib\re.py" in compile 
    190.  return _compile(pattern, flags) 
File "c:\python27\lib\re.py" in _compile 
    242.   raise error, v # invalid expression 

Exception Type: error at/
Exception Value: unexpected end of pattern 

Answer 1

正如丹尼爾曾表示，有在你的URL正則表達式中的一個問題，所以檢查urls.py爲無效正則表達式的跡象。您的堆棧跟蹤指示表達式已經啓動但未正確終止。一個意外的模式結束的例子是一個沒有像r'foo[0-'這樣的終止括號的字符集。

此外，permalink decorator is no longer recommended，使用reverse來代替。

您可能能夠重寫get_absolute_url這樣的：

from django.core.urlresolvers import reverse 

def get_absolute_url(self): 
    return reverse('catalog_category', kwargs={'category_slug': self.slug})