Range filter doesn't accept variables

Question

How do I pass variables into the range filter from a static supertable field?

{% for item in variants.b2bProductQty %}

  {% set start = item.selectRange.cellStartInteger %}
  {% set end = item.selectRange.cellEndInteger %}
  {% set increment = item.selectRange.cellIncerement %}

  {% for i in range(start, end, increment) %}
     <option value="{{ variants.sku }}:">{{ i }}</option>
  {% endfor %}

{% endfor %}

This results in the error:

range(): Argument #3 ($step) must not exceed the specified range

When I hardcode the numbers from the field it works

{% for i in range(5, 50, 5) %}
   <option value="{{ variants.sku }}:">{{ i }}</option>
{% endfor %}

If I just print out {{ start }} it shows 5 just fine

Answer 1

I can't test easily because I never use Supertable, but my guess would be that if you were to dump out item.selectRange.cellStartInteger (DUMP out, not just print out - ie.{{ dump(item.selectRange.cellStartInteger) }}), you might find that it's a big complicated object rather than just a simple value. In that case, if it's anything like Craft's dropdown field you'll need to put .value on the end to get just the raw value.

Answer 2

The error was in the increment variable because it is optional. If there is no value it throws an error it shoudl default to 1

So I constructed it like this:

{% for item in variants.b2bProductQty %}

  {% set start = item.rangeStart %}
  {% set end = item.rangeEnd %}
  {% set increment = item.rangeInc ? item.rangeInc : 1 %} {# fallback to 1 #}
                                
  {% for i in range( item.rangeStart , item.rangeEnd, increment) %}
    <option value="{{ variants.sku }}:">{{ i }}</option>
  {% endfor %}
                                
{% endfor %}