title: Rails 3 - select with Include?
body: <p>Here is a nested select with include:</p>
  
  <pre><code>@items = Item.where("complete = ?", true).includes( :manufacturer, {:order=&gt;[:supplier, :agent] })
  </code></pre>
  
  <p>This is a taxing query as it pulls 1000s of rows of data from all the above included tables.</p>
  
  <p>How can I get the query to only select specific fields?</p>
  
  <ul>
  <li>user.name, user.created_at</li>
  <li>order.created_at</li>
  <li>supplier.name</li>
  <li>agent.name</li>
  <li>manufacturer.name</li>
  </ul>