Yep. My solution is a custom template tag
from django.template.defaulttags import register
from urllib.parse import urlencode
@register.simple_tag(takes_context=True)
def querystringmod(context, *args):
"""Modify current querystring:
{% querystringmod name value [name value [...]] %}
"""
if (len(args) % 2) !=0:
args.append("")
request = context['request']
current_qs = request.GET.dict()
current_qs.update(dict([ (args[n], args[n+1]) for n in range(0, len(args
), 2) ]))
return urlencode(current_qs)
in template
<a href="?{% querystringmod "page" page_obj.previous_page_number %}">
previous</a>
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