How to access list using variable indexes in Django templates?

Question

Say, I have two lists of objects, foo and bar. In a Django template, while looping through foo, there\'s a counter that keeps track of

Answer 1

Right, you can't resolve variable names. Definitely try very hard to put this logic in the view.

But 5% of the time, I do find this extremely limiting at times requiring too much logic in the view / changes required outside the template authors control. I've come to accept a few personal customizations, allowing for variable assignment within the view as well as simple variable resolution.

It's quite simple to build a template tag that does so though, using the template engines "all lookups in one" system (index, attribute, key).

from django.template import Variable, VariableDoesNotExist

@register.assignment_tag()
def resolve(lookup, target):
    try:
        return Variable(lookup).resolve(target)
    except VariableDoesNotExist:
        return None

{% resolve some_list some_index as value %}
{% resolve some_dict some_dict_key as value %}