django forloop.counter operation

Question

我想知道如何在django中复制它：

for photo in gallery
    if counter is 1 
        then use this photo
     endif
endfor

如果它是“1”，我如何检查forloop计数器？

Answer 1

{% for photo in gallery %}
    {% if forloop.counter == 1 %}
       Do something with {{ photo }}.
    {% endif %}
{% endfor %}

这相当于：

{% for photo in gallery %}
    {% if forloop.first %}
       Do something with {{ photo }}.
    {% endif %}
{% endfor %}

参考：Django docs