How to slice a sorted list in Jinja?

Question

I have a list of dictionaries. I want to first sort that list, then only iterate over a subset of those items.

This is what I tried:

{% for response in responses|sort(true, attribute='response_date')[:5] %}
    <p>response</p>
{% endfor %}

But Jinja doesn't like this syntax, and raises the error TemplateSyntaxError: expected token 'end of statement block', got '['

If I don't use the sort() filter, the slice works. But I want to use both together.

Answer 1

You can achieve this by wrapping your sort in a parentheses:

{% for response in (responses|sort(true, attribute='response_date'))[:5] %}
   <p>response</p>
{% endfor %}

Answer 2

Can't you simply wrap responses|sort(true, attribute='response_date') with parentheses?

{% for response in (responses|sort(true, attribute='response_date'))[:5] %}
    <p>response</p>
{% endif %}