title: Why do we use $model = new ModelName('search') in action admin?
body: <p>Even if we create the object normally it works in action admin then why do we use search argument while creating the object?</p>
  
  <p>I don't understand the usage of the following code which sends <code>id</code> along with the search while creating the <code>modelobject</code> like</p>
  
  <pre><code>$model=new ModelName('search&amp;id='.$_GET['id']);
  </code></pre>