使用get_absolute_url时的ImportError

时间:2013-07-03 11:12:30

标签: django django-templates

我有一个用于获取最新条目的模板标签,但我似乎无法访问“get_absolute_url”函数。

我的错误是

No module named app2 (not the name of the app I'm trying to use)

我的新闻模特是这样的:

STATUS_CHOICES = (
    (DRAFT, _('Draft')),
    (HIDDEN, _('Hidden')),
    (PUBLISHED, _('Published'))
)

TYPE_CHOICES = (
    ('normal', _('Normal')),
    ('special', _('Special')),
)


class Entry(models.Model):
    title = models.CharField(max_length=255)
    slug = models.SlugField(max_length=255)
    body = RichTextField(null=True, blank=True)
    start_publication = models.DateTimeField(blank=True, null=True)
    end_publication = models.DateTimeField(blank=True, null=True)    
    status = models.IntegerField(choices=STATUS_CHOICES, default=DRAFT)
    arttype = models.CharField(max_length=10, choices=TYPE_CHOICES, default='normal', )

    objects = models.Manager()
    published = EntryPublishedManager()

    def __unicode__(self):
        return self.title

    class Meta:
        ordering = ['-start_publication']
        get_latest_by = 'creation_date'


    @models.permalink
    def get_absolute_url(self):
            creation_date = timezone.localtime(self.start_publication)
            return ('entry_detail', (), {
                'year': creation_date.strftime('%Y'),
                'month': creation_date.strftime('%b').lower(),
                'day': creation_date.strftime('%d'),
                'slug': self.slug})

我的urls.py是这样的:

urlpatterns = patterns('',
    url(r'^(?P<year>\d{4})/(?P<month>\w{3})/(?P<day>\d{2})/(?P<slug>[-\w]+)/$', DateDetailView.as_view(allow_future=True, date_field='start_publication', queryset=Entry.objects.all()), name='entry_detail'),
)

我的templatetag latest_news.py:

from django import template
from apps.news.models import Entry


register = template.Library()

def show_news():
        entry = Entry.published.filter(arttype='normal').order_by('-start_publication')[:4]
        return entry

register.assignment_tag(show_news, name='latest_news')

我的frontpage.html模板:

{% latest_news as latest_news %}
{% for entry in latest_news %}
    <h2>{{ entry.title }}</h2>
    <p><a href="{{ entry.get_absolute_url }}">Read more</a></p>
{% endfor %}

{{entry.title}}工作正常。但不是.get_absolute_url。为什么要尝试导入另一个应用程序?

2 个答案:

答案 0 :(得分:1)

get_absolute_url中,您忘记在网址上拨打reverse。你正在传递元组,这使它无效。您的get_absolute_url应为:

from django.core.urlresolvers import reverse

def get_absolute_url(self):
        creation_date = timezone.localtime(self.start_publication)
        return reverse('entry_detail', kwargs={
            'year': creation_date.strftime('%Y'),
            'month': creation_date.strftime('%b').lower(),
            'day': creation_date.strftime('%d'),
            'slug': self.slug})

permalink decorator is deprecated and the use of reverse is recommended

答案 1 :(得分:0)

您在项目中的其他位置,在urls.py中引用的应用中发生错误。

反向URL查找功能(您使用@permalink装饰器隐式使用)必须导入urls.py文件中引用的所有视图,以便计算正确的值。如果某处出现错误,则会失败。

您应该找到app2的引用,无论它在哪里,并修复它。