如何从列表中选择第一个项目 [英] How to select the first item from a list

问题描述

 
我有以下  code> {％如果照片％} 
 {％照片中的照片％} 
 {％thumbnail photo.photo100x100crop =centeras im％} 
< ; img src ={{im.url}}alt =用户的照片data-ajax ={％url'photo_increase_view'pk = photo.id％}/> 
 {％endthumbnail％} 
 {％endfor％} 
 {％endif％} 
  

如何选择并显示列表中的第一张照片？

解决方案

您可以访问第一张照片元素使用 .0 ：

将其与 with 标签（以最小化更改）：

  {％if photos％} 
 {％with photo = photos.0％} 
 {％thumbnail photo.photo 100x100crop =centeras im％} 
< img src ={{im.url}}alt =用户的照片data-ajax ={％url'photo_increase_view'pk = photo。 id％}/> 
 {％endthumbnail％} 
 {％endwith％} 
 {％endif％} 
  

I have the following for loop that spits out all photos in a list:

{% if photos %}
{% for photo in photos %}
    {% thumbnail photo.photo "100x100" crop="center" as im %}
    <img src="{{ im.url }}" alt="User's photos" data-ajax="{% url 'photo_increase_view' pk=photo.id %}"/>
    {% endthumbnail %}
{% endfor %}
{% endif %}

How can I just select and display the first photo in the list?

解决方案

You can access the first element using .0:

Combine it with with tag (to minimize changes):

{% if photos %}
{% with photo=photos.0 %}
    {% thumbnail photo.photo "100x100" crop="center" as im %}
    <img src="{{ im.url }}" alt="User's photos" data-ajax="{% url 'photo_increase_view' pk=photo.id %}"/>
    {% endthumbnail %}
{% endwith %}
{% endif %}

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