Get loop index of outer loop
Jinja2Template EngineJinja2 Problem Overview
In jinja, the variable loop.index holds the iteration number of the current running loop.
When I have nested loops, how can I get in the inner loop the current iteration of an outer loop?
Jinja2 Solutions
Solution 1 - Jinja2
Store it in a variable, for example:
{% for i in a %}
{% set outer_loop = loop %}
{% for j in a %}
{{ outer_loop.index }}
{% endfor %}
{% endfor %}
Solution 2 - Jinja2
You can use loop.parent inside a nested loop to get the context of the outer loop
{% for i in a %}
{% for j in i %}
{{loop.parent.index}}
{% endfor %}
{% endfor %}
This is a much cleaner solution than using temporary variables. Source - http://jinja.pocoo.org/docs/templates/#for