To generate a set of Javascript variables with the relevant parameters from my Django application I have two nested for loops:

<script>

{% for model in models %} 

    {% for item in model.attribute|slice::3 %}

        {% if forloop.first %} 

            var js_variable{{ forloop.parentloop.counter0 }} = [

        {% endif %}

            '{{ item.attribute }}' ,

        {% if forloop.last %}

            {{ item.attribute }} ]

    {% empty %}

        var js_variable{{ forloop.parentloop.counter0 }} = []

    {% endfor %}

{% endfor %}



....code that gets unhappy when js_variable[n] doesn't exist.....



</script>

When {% empty %} occurs it doesn't seem to have the access to the {{ forloop.parentloop. counter0 }} variable, and so the variable name js_variable[n] is printed incorrectly as js_variable (without the number otherwise provided by the counter), and later code complains.

Is it the case that this variable won't be available in the {{ empty }} tag?