title: Retrieve collection in domain class from Database
body: <p>We use dynamic scaffolding in our project and hence place maximum coding in Domain itself.</p>
  
  <p>I have a requirement where I want to retrieve a collection for a Domain class property from the same domain class.
  Example :</p>
  
  <pre><code>class Person{
  
  String name
  
  String school
  
  }
  </code></pre>
  
  <p>school property should be a dropdown containing list of all schools so far available in the Person table. If no value available, it can be empty dropdown.</p>
  
  <p>Any suggestions to achieve this in domain class itself?</p>