Django URL regex for alphanumeric string

Question

My current url pattern is:

url(r'^(?P<category>\w+)/(?P<hash>\w+)/$', article, name='article'),

hash is an alphanumeric string that can be uppercase or lowercase.

example: gqaBittXW9hcyO

What should my url pattern look like to operate for this?

Error:

NoReverseMatch at /news/gqaBittXW9hcyO/
Reverse for 'article' with keyword arguments '{'id': 1, 'category': 'news'}' not found. 1 pattern(s) tried: ['(?P<category>\\w+)/(?P<hash>\\w+)/$']

views

def article(request, category, hash, extra_context=None):

    name = resolve(request.path).kwargs['category']
    instance = get_object_or_404(Post, hash=hash, entered_category=name)
    print('Hash:', instance.hash) #prints correctly (gqaBittXW9hcyO)

    context = {
        'id': instance.id,
        'instance': instance,
    }

    return render(request, 'article.html', context)

Current pattern should work fine. What is your problem?

neverwalkaloner
– neverwalkaloner

2018-03-24 11:21:31 +00:00
Commented Mar 24, 2018 at 11:21 — neverwalkaloner
– neverwalkaloner, Commented Mar 24, 2018 at 11:21

Alex Hall · Accepted Answer · 2018-03-24 11:25:44Z

1

The error indicates that somewhere (probably your template) you tried to create a URL with the name article with arguments {'id': 1, 'category': 'news'}. But the way you've defined it, you can't construct an article URL using an id, you need a hash.

The URL /news/gqaBittXW9hcyO/ is not related to this error, it matched correctly.

answered Mar 24, 2018 at 11:25

Alex Hall

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1 Comment

Zorgan Over a year ago

yes you're right, there was a URL with the name article with arguments {'id': 1, 'category': 'news'} hiding somewhere in the template. All fixed now, thanks.

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