Question

I have the following urlpatterns:

urlpatterns = patterns('',
    url(r'^new$', 'webapp.views.new_post', name="new_post"),
    url(r'^$', 'webapp.views.all_posts', name="main"),
    url(r'^post/(\d{4})/(\d{2})/(\d{2})/$', 'webapp.views.single_post', name="single_post"),
    # Uncomment the admin/doc line below to enable admin documentation:
    # url(r'^admin/doc/', include('django.contrib.admindocs.urls')),

    # Uncomment the next line to enable the admin:
    # url(r'^admin/', include(admin.site.urls)),
)

And a template that looks like this:

{% for i in posts %}
    <h3><a href={% url 'single_post' i.created_at.year i.created_at.month i.created_at.day %}>{{i.title}}</a></h3>
    Posted at: {{i.created_at}}
    <br>
    <br>
    {{i.text}}
    <hr>
{% endfor %}

But I keep getting a NoReverseMatch exception saying Reverse for 'single_post' with arguments '(2012, 9, 30)' and keyword arguments '{}' not found.

Edit: I’m using Django 1.4.1 on Python 2.7

Answer 1

From python docs:

{m} Specifies that exactly m copies of the previous RE should be matched; fewer matches cause the entire RE not to match. For example, a{6} will match exactly six ‘a’ characters, but not five.

So url pattern should be:

r'^post/(\d{4})/(\d{1,2})/(\d{1,2})/$'

Hope this helps.