Set variable in jinja
{{ }} tells the template to print the value, this won't work in expressions like you're trying to do. Instead, use the {% set %} template tag and then assign the value the same way you would in normal python code.
{% set testing = 'it worked' %}{% set another = testing %}{{ another }}Result:
it worked
Nice shorthand for Multiple variable assignments
{% set label_cls, field_cls = "col-md-7", "col-md-3" %}
Just Set it up like this
{% set active_link = recordtype -%}