如何检查Django模板中集合的大小？ [英] How can I check the size of a collection within a Django template?

问题描述

我的Django模板中有一个列表。仅在列表大小大于零时，我才想做某事。

I have a list in my Django template. I want to do something only if the size of the list is greater than zero.

我尝试了 myList | length 和 myList | length_is ，但没有成功。

I have tried myList|length and myList|length_is but they have not been successful.

我到处搜索，没有看到任何示例。我该如何检查？

I've searched all over and don't see any examples. How can I check this?

推荐答案

请参见 https://docs.djangoproject.com/en/stable/ref/templates/builtins/#if ：仅用于复制其示例：

See https://docs.djangoproject.com/en/stable/ref/templates/builtins/#if : just use, to reproduce their example:

{% if athlete_list %}
    Number of athletes: {{ athlete_list|length }}
{% else %}
    No athletes.
{% endif %}

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