Django templates - Regrouping by a string parameter

Question

I have the following code in one of my Django templates that I want to refactor:

{% ifequal sort_type "set" %} 
 {% regroup cards by set as grouped %} 
{% endifequal %}
{% ifequal sort_type "rarity" %} 
 {% regroup cards by rarity as grouped %}
{% endifequal %}

It does work, but it's really ugly and I want to make it more like this:

{% regroup cards by sort_type as groupedcards %}

But this doesn't work (it just puts them all in a single group called None.) From the documentation, I think it might be trying a dictionary lookup (i.e., calling card["set"] instead of card.set).

Is there a good way to do this in the template, or should I move the regrouping out into the Python code using itertools?

Answer 1

Ticked in Django bugtracker related to this problem.
And a sample of similar usage of regroup which may help to refactor the code.