title: Add Attribute to ActiveReccord after query
body: <p>This is what i trying to do: I have a User model with attributes :name, :lastame and :email. After a method like the following:</p>
  
  <pre><code>providers = User.find_by_sql [ query ]
  </code></pre>
  
  <p>I'd like all the users in providers to include a new attribute :location.</p>
  
  <p>Is that possible?</p>