title: Get most commented objects
body: <p>I'm using <a href="https://github.com/elight/acts_as_commentable_with_threading" rel="nofollow">acts_as_commentable_with_threading</a> gem to make users able to comment my blog posts. </p>
  
  <p>What I want to do now is to display most commented posts but I have no idea how to query them (and as far as I know, the gem not provides such method). Can you write me some tips or ideas how to achieve something like that?</p>