How to access outermost forloop.counter with nested for loops in Django templates?

问题

Is it possible to access the forloop.counter for the outermost for loop in the following template in Django:

{% for outerItem in outerItems %}
    {% for item in items%}
        <div>{{ forloop.counter }}.&nbsp;{{ item }}</div>
    {% endfor %}
{% endfor %}

forloop.counter returns the innermost for loop's counter in the above example

回答1:

You can use forloop.parentloop to get to the outer forloop, so in your case {{forloop.parentloop.counter}}.

回答2:

you can also use with

Caches a complex variable under a simpler name. This is useful when accessing an “expensive” method (e.g., one that hits the database) multiple times.

{% for outerItem in outerItems %}
  {% with forloop.counter as outer_counter %}
    {% for item in items%}
        <div>{{ outer_counter }}.&nbsp;{{ item }}</div>
    {% endfor %}
  {% endwith %}
{% endfor %}

if using high version of Django you could use

{% with outer_counter = forloop.counter %}

I've checked, Django 1.4.x - Django 1.9.x support the two methods.

this is more clear when have many for loops

来源：https://stackoverflow.com/questions/2376511/how-to-access-outermost-forloop-counter-with-nested-for-loops-in-django-template