Question

Django’s template tags include an {% ifchanged %} test for use within loops to check if a value has changed. I’m using it to output a new <div> tag every time a variable changes.

I want every 4th <div> to have a specific class, but Django’s forloop.counter variable isn’t helpful here as it increments every time the loop runs, even when the {% ifchanged %} test doesn’t run, so it outputs irregularly.

Does anyone know of a way to get around this? Obviously I can’t set my own counter inside a Django view, so I have no way of checking when the ‘inner’ loop has changed.

Thanks,
Matt

Answer 1

You can simply use the divisibleby filter:

{% if forloop.counter|divisibleby:"4" %}
   ....
{% endif %}

Update:

You have to use a counter+divisibleby filter in your template. Look at this template tag: Counter, it can help you.

Or

Filter out duplicate items (if possible) in the view before passing them to the template and use the divisibleby filter.