title: How not to delete a child object when parent is deleted?
body: <p>I have this class</p>
  
  <pre><code>class Vote {    
      Post post
  }
  </code></pre>
  
  <p>When I delete an object of <code>Vote</code> it should not cascade delete <code>Post</code>.</p>
  
  <p>How can I do it?</p>