title: GetModel class with Magento retrieve data based on a mysql field which is not a primary key
body: <p>I would like to change this snippet to fetch some data from a table, and instead of triggering the primary key(which looks like the default behaviour of the load() function), I would like to trigger another field in my request...How can i do that ?</p>
  
  <pre><code>$mytable = Mage::getModel('mytable/mytable')-&gt;load($mytable_id)-&gt;getData();
  </code></pre>
  
  <p>thx</p>