title: How to load data from another table/model
body: <p>Having just started with Cake, I'm now very frustrated having already spent several hours reading examples etc What I want to do seems so simple, but I can't make enough sense of the documentation to find out how to do this. It's very simple:</p>
  
  <p>I have 2 tables:</p>
  
  <ul>
  <li>items </li>
  <li>categories (eg books, cd)</li>
  </ul>
  
  <p>New items will be created constantly, each has a category.</p>
  
  <p>All I want to do is create a dropdown filter in the items list view. But to do this I need to load the list of categories.</p>
  
  <p>So the basic problem is, how do I access the categories table from the items table?</p>