Get first item of QuerySet in template

问题

In my blog app I want to display a list of blog posts and the first image connected to this post. Now I do it this way:

{% for image in entry.image_set.all|slice:"1" %}
    <img src="{{ image.get_absolute_url }}">
{% endfor %}

Is there a template shortcut I don't know about, or maybe I should just write my own Manager?

回答1:

Not any shorter, but you could use first:

{% with entry.image_set.all|first as image %}
  <img src="{{ image.get_absolute_url }}">
{% endwith %}

回答2:

Since Django 1.6 you can do

<img src="{{ entry.image_set.first.get_absolute_url }}">

来源：https://stackoverflow.com/questions/3520554/get-first-item-of-queryset-in-template