title: Grabbing the latest 3 records from model rails
body: <p>Just wondering if there is a more efficient way of handling the following query, within my controller i have</p>
  
  <pre><code>@latest = Portfolio.limit(3).order('taken desc')
  </code></pre>
  
  <p>to extract the latest 3 records from my model.</p>
  
  <p>Is there a more efficient query that could handle this, would the query be better served within a scope in the model?</p>
  
  <p>Advice appreciated</p>
  
  <p>Thanks</p>