add_query only if values if valid Python True value

[luzfcb]

Hello, first, thank you, your library is very useful.

it is possible to make a conditional inclusion

assuming I have these three variables in the template context

{
    'next_kwarg_name' : 'goto',
    'next_page_url' : 'http://google.com',
    'popup': False,
}

and this url

{% url 'my_updateview' pk=object.pk as base_my_updateview_url %} 


{% spurl base=base_my_updateview_url add_query="{{ next_kwarg_name }}={{ next_page_url }}" add_query="popup={{ popup }}" as documento_update_url %}

suposing that base_my_updateview_url value is http://127.0.0.1:8000/update/1

documento_update_url value that I would like to get is:
http://127.0.0.1:8000/update/1?goto=http://google.com

I currently I get:

http://127.0.0.1:8000/update/1?goto=http://google.com&popup=False

If it is not possible, would you have any suggestions on how to resolve this case.
Thanks.