Why is dynamic url request not working?

Question

Django

i make a request like this

{% url 'pages:page' b.id %}
{{b.id}}

And django writes to me

django.urls.exceptions.NoReverseMatch: Reverse for 'pages' with arguments '('',)' not found. 1 pattern(s) tried: ['ru/page/(?P[0-9]+)/$']

but {{b.id}} displays the page id, which is the problem.

Answer 1

Can you take a look at the line for 'pages:page' in urls.py?