title: Get first item of QuerySet in template
body: <p>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:</p>
  
  <pre><code>{% for image in entry.image_set.all|slice:"1" %}
      &lt;img src="{{ image.get_absolute_url }}"&gt;
  {% endfor %}
  </code></pre>
  
  <p>Is there a template shortcut I don't know about, or maybe I should just write my own Manager?</p>