Tests

Within Jinja templates, you can use so-called tests. Basically, those are helpers usable in conditions after is keyword:

{% if loop.index is divisibleby 3 %}
    {# ... #}
{% endif %}

All of our filters are implemented in templates.tests module.

Bultin Tests

There are several widely used builtin tests directly in Jinja.

Checks if size of a collection is higher than 0

Example: items is not_empty

Checks if an object is instance of a certain type / class

Example: parent is of_type "ListQuestion"

💡 The name must be a string; however, it is case-insensitive. It also checks all superclasses.