title: Could not display image uploaded template
body: <p>I'm in model author create a field for upload picture for my author.
  But when I want to go inside template, it doesn't show any.</p>
  
  <p>My code in template </p>
  
  <pre><code>&lt;img src="{{ post.author.pic }}" /&gt;
  </code></pre>
  
  <p>and in model author :</p>
  
  <pre><code>pic = models.ImageField(upload_to = func.upload_location, null = True, blank = True)
  </code></pre>