如何访问最外层的forloop。在Django模板中嵌套for循环的计数器?

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

可以访问forloop吗?下面Django模板中最外层for循环的计数器:

{% 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

forloop。计数器在上面的例子中返回循环计数器的最里面。

2 个解决方案

#1

173

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

您可以使用forloop。为了到达外部的forloop，所以在您的例子{forloop.parentloop.counter}中。

#2

you can also use with

你也可以用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.

用简单的名称缓存复杂的变量。当访问一个“昂贵的”方法(例如，多次访问数据库的方法)时，这是很有用的。

{% 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

如果使用高版本的Django，您可以使用。

{% with outer_counter = forloop.counter %}

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

我已经检查,Django 1.4。1.9 x - Django。x支持这两种方法。

this is more clear when have many for loops

当有许多for循环时，这就更清晰了

#1

173