Access a variable from template tag that takes arguments

Question

I have a template tags that takes ID on template and returns a list, I want to check the list if the variable is available and make checkbox input checked.

`_checkbox.html`
{% load get_previous_response %}

{% user_response question.id %} {# this returns a list of ids #}

So I want to do something like this

<input type="checkbox" {% if option.id in user_response %}checked{% endif %}>
problem is the above won't work, I tried django templatetag `with template context`

My main goal is I want to access the list returned by {% user_response question.id %}.

EDIT

My custom templatetag.

get_previous_response.py

from django import template
from survey.models import Question
register = template.Library()

@register.simple_tag(takes_context=True)
def user_response(context, question_id):
    question = Question.objects.filter(id=question_id).first()
    user = context['request'].user
    response = question.get_simple_answer(user)
    return response

Answer 1

You can try:

{% if option.id in user_response %}
   <input type="checkbox" checked>
{% else %}
   <input type="checkbox">
{% endif %}