title: How to log an entity that has collections?
body: <p>I want to log all changes of an entity. I looked into <a href="https://github.com/Atlantic18/DoctrineExtensions/blob/master/doc/loggable.md" rel="noreferrer">Loggable</a> doctrine extension as provided by the StofDoctrineExtensionsBundle.</p>
  
  <p>I got it working for fields that store simple data, e.g. string and integers. But my entity also has ManyToMany relationship to another entity, e.g. <code>Tags</code>.</p>
  
  <p>I am getting this error:</p>
  
  <pre><code>InvalidMappingException: Cannot versioned [tags] as it is collection in object - Hn\AssetDbBundle\Entity\Asset
  </code></pre>
  
  <p>Is there a way to log an entity with its relationships? I don't mind switching to another bundle.</p>