title: Avoid loading associated relationship objects
body: <p>I am using Ruby on Rails 3.0.7 and, for performance reason, I would like to avoid loading associated objects on retrieving a class obect. That is, if I have an <code>Article</code> class\model with a <code>has_many :users</code> statement I would like to not load associated <code>User</code> objects when I retrieve an <code>Article</code> object (I think this behavior depends on the Ruby on Rails "Convention over Configuration" principle).</p>
  
  <p><strong>How can I do that?</strong></p>