Django, url tag in template doesn't work: NoReverseMatch

Posted by Lukasz Jocz on Stack Overflow See other posts from Stack Overflow or by Lukasz Jocz
Published on 2012-10-19T22:59:42Z Indexed on 2012/10/19 23:00 UTC
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I've encountered a problem with generating reverse url in templates in django. I'm trying to solve it since a few hours and I have no idea what the problem might be. URL reversing works great in models and views:

# like this in models.py
@models.permalink
    def get_absolute_url(self):
        return ('entry', (), {
            'entry_id': self.entry.id,
        })

# or this in views.py
return HttpResponseRedirect(reverse('entry',args=(entry_id,)))

but when I'm trying to make it in template I get such an error:

NoReverseMatch at /entry/1/
Reverse for ''add_comment'' with arguments '(1L,)' and keyword arguments '{}' not found.

My file structure looks like this:

project/
+-- frontend
¦   +-- models.py
¦   +-- urls.py
¦   +-- views.py
+-- settings.py
+-- templates
¦   +-- add_comment.html
¦   +-- entry.html
+-- utils
¦   +-- with_template.py
+-- wsgi.py

My urls.py:

from project.frontend.views import *
from django.conf.urls import patterns, include, url

urlpatterns = patterns('project.frontend.views',

    url(r'^entry/(?P<entry_id>\d+)/', 'entry', name="entry"),
    (r'^entry_list/', 'entry_list'),

Then entry_list.html:

{% extends "base.html" %}
{% block content %}
    {% for entry in entries %}
            {% url 'entry' entry.id %}
    {% endfor %}
{% endblock %}

In views.py I have:

@with_template
def entry(request, entry_id):
    entry = Entry.objects.get(id=entry_id)
    entry.comments = entry.get_comments()
    return locals()

where with_template is following decorator(but I don't think this is a case):

class TheWrapper(object):
    def __init__(self, default_template_name):
        self.default_template_name = default_template_name

    def __call__(self, func):
        def decorated_func(request, *args, **kwargs):
            extra_context = kwargs.pop('extra_context', {})
            dictionary = {}
            ret = func(request, *args, **kwargs)
            if isinstance(ret, HttpResponse):
                return ret
            dictionary.update(ret)
            dictionary.update(extra_context)
            return render_to_response(dictionary.get('template_name',
                                                     self.default_template_name),
                                      context_instance=RequestContext(request),
                                      dictionary=dictionary)
        update_wrapper(decorated_func, func)
        return decorated_func

if not callable(arg):
    return TheWrapper(arg)
else:
    default_template_name = ''.join([ arg.__name__, '.html'])
    return TheWrapper(default_template_name)(arg)

Do you have any idea, what may cause the problem? Great thanks in advance!

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