Making URL to accept parameters as optional. Non Capturing

Question

I want to make my url to accept the optional parameters only when given. I am unable to make the parameters optional/non-capturing.


re_path(r'^users/(?:(?P<sort_by>\d+)/)?$', views.UserListView.as_view(), name='user_list'),

I want this url to accept a slug field only when provided to the view. How can I do this? It is showing an error

Reverse for 'user_list' with keyword arguments '{'sort_by': 'username'}' not found. 1 pattern(s) tried: ['admin/users/(?:(?P<sort_by>\\d+)/)?$']

when I passed sort_by='username'

See [Django optional url parameters](https://stackoverflow.com/questions/14351048/django-optional-url-parameters) — Wiktor Stribiżew, Aug 13 '19 at 13:26
i just want [a-z] and _ in my url. like sort_by=is_superuser — Deshwal, Aug 13 '19 at 13:36
something like admin/users/is_superuser or admin/users/date_created — Deshwal, Aug 13 '19 at 13:39

score 2 · Accepted Answer · answered Aug 13 '19 at 13:51

2

You could keep your url to:

re_path(r'^users/$', views.UserListView.as_view(), name='user_list'),

And then in your template use

   <a href="{% url 'user_list' %}?sort_by=username">Sort</a>

answered Aug 13 '19 at 13:51

HenryM

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Thanks a lot. It worked. Can you tell me how to sort data using that? It looks messy but yeah it is working. – Deshwal Aug 13 '19 at 14:34

score 0 · Answer 2 · edited Aug 13 '19 at 14:36

0

I would create 2 URLs:

path('users/<str:sort_by>', views.UserListView.as_view(), name='user_list_by_user'),
path('users', views.UserListView.as_view(), {'sort_by': 'default_sort_you_use'}, name='user_list'),

Then you can call the appropriate URL and always have a sort_by value in the view.

edited Aug 13 '19 at 14:36

Lightness Races in Orbit

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answered Aug 13 '19 at 14:11

Katty

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thanks man. I was using slug. will it makes a differene if I pass or ? – Deshwal Aug 13 '19 at 14:35
Sure, you can use – Katty Aug 13 '19 at 14:38

Making URL to accept parameters as optional. Non Capturing

2 Answers2