python - block.super returns NoReverseMatch -

i'm learning django , have problems templates.

i'm trying add content extended template.

structure of code:

base.html category      -- category_detail.html      -- list_content.html 

category_detail.html

{% extends 'base.html' %} {% block title %}     {{ category_name  }} {% endblock %}  {% block description %}     {{ category_description }} {% endblock %}  {% block content %}     <div class="col-md-10 text-center">     <a href="{% url 'charts:category_error_list' category_name %}" id="list-button" class="btn btn-success btn-lg active" role="button" aria-pressed="true">error list</a>     </div> {% endblock %} 

simple subpage button. button should redirect template, hovewer gives me noreversematch.

list_content.html (which category_error_list defined in view)

{% extends 'category/category_detail.html' %}  {% block content %}    {{ block.super }}    <h1 class="page-header"> string</h1> {% endblock %} 

what i'm trying achieve displaying "some string" under button. (i know should done better ajax example, want learn basics).

urls.py

urlpatterns = [     url(r'^category/$', views.categories_list, name='categories'),     url(r'^category/(?p<category_name>\w+)/$', views.category_detail, name='category_detail'),     url(r'^category/(?p<category_name>\w+)/list/$', views.category_error_list, name='category_error_list'), ]  

views.py

# ${url}/category/${category} def category_detail(request, category_name):     cat_detail = category.objects.get(name=category_name)     return render(request, 'charts/category/category_detail.html',                  {'category_name': cat_detail.name,                  'category_description': cat_detail.description})  #${url}/category/${category}/list def category_error_list(request, category_name):     category_with_errors = category.objects.filter(name=category_name)     error_list = error.objects.get(category=category_with_errors)     return render(request, 'charts/category/list_content.html',                  {'errors_list': error_list}) 

problems seems related urls.py, can't find wrong.

stacktrace:

template error: in template                  /usr/src/app/analizer/charts/templates/charts/category/list_content.html, error @ line 0 reverse 'category_error_list' arguments '('',)' , keyword arguments '{}' not found. 1 pattern(s) tried: ['category/(?p<category_name>\\w+)/list/$']    1 : {% extends 'category/category_detail.html' %} 2 :  3 : {% block content %} 4 :    {{ block.super }} 5 :    <h1 class="page-header"> cos tam </h1> 6 : {% endblock %} 7 :  8 :  

if remove block.super tag working, i'm overriding content on parent template. i'm doing wrong?

i'm using django-1.9.4.

i have found solution - nonintuitive me - working.

view category_error_list missing category_name variable, have fixed this:

def category_error_list(request, category_name):     category_with_errors = category.objects.get(name=category_name)     error_list = error.objects.get(category=category_with_errors)     return render(request, 'charts/category/list_content.html',                  {'category_name': category_with_errors.name,                   'errors_list': error_list})