title: Using models in third-party extensions
body: <p>I'm using a third-party extension in Yii and I'd like to know, if it's possible to use the models in the extension.</p>
  
  <p>The extension create a table on my database and the model has a relation rule to my <code>user</code> table. I have added a relation on my <code>user</code> model to the extension's model.</p>
  
  <p>When I do a <code>findAll</code> query, it throws me an error: <code>include(ExtensionModel.php): failed to open stream: No such file or directory</code>.</p>
  
  <p>How do I use models in third-party extensions?</p>