Passing a macro argument to an if == test in jinja? - macros

Question

I'm using Tarbell to publish a formatted version of an inventory spreadsheet. Every row has a category, so I can do something like this:
<h2>Power Tools</h2>
{% for row in inventory %}
{% if row.Category == "powertools" %}
<b>{{ row.Display_Name|e }}</b> <br />
{% endif %}
{% endfor %}
<h2>A/V Gear</h2>
{% for row in inventory %}
{% if row.Category == "av" %}
<b>{{ row.Display_Name|e }}</b><br />
{% endif %}
{% endfor %}
To get a list of all the power tools followed by a list of A/V gear. I'd like to move that into a macro that I can call with a couple of arguments. I've got this:
{% macro list(cat, title='') -%}
<p>Category: {{ cat }}; Header: {{ title }}</p>
{% for row in inventory %}
{% if row.Category == "{{ cat }}" %}
<b>{{ row.Display_Name|e }}</b><br />
{% endif %}
{% endfor %}
{%- endmacro %}
When I call it with:
{{ list('av', title='Cameras and Audio Recorders')}}
{{ list('powertools', title='Power Tools')}}
I see "Category: powertools; Header: Power Tools" and "Category: av; Header: Cameras and Audio Recorders" as expected, so I know the macro can hear me, but the list itself doesn't show up. Can I use a macro argument in a comparison test? How?

Answer 1

There is no need for variable interpolation syntax inside of a block - you can just refer to the variable by name as you would in Python:
{# Do this #}
{% if row.Category == cat %}
{# Instead of this #}
{% if row.Category == "{{ cat }}" %}