title: Django DB Models F Combined Expression
body: <pre><code>In [1]: from django.db.models import F
  
  In [2]: from forum.models import Post
  
  In [3]: post = Post.objects.get(id=1)
  
  In [4]: post.view_count = F('view_count') + 1
  
  In [5]: post.save()
  
  In [6]: post.view_count
  
  Out[6]: &lt;CombinedExpression: F(view_count) + Value(1)&gt;
  
  In [7]: post = Post.objects.get(id=1)
  
  In [8]: post.view_count
  
  Out[8]: 3
  </code></pre>
  
  <p>After saved the post, it returned the combined expression.</p>
  
  <p>I want the exact result (3).</p>
  
  <p>is it possible to do without calling get method again / refresh_from_db ?</p>