title: How to have a drop down <select> field in a rails form?
body: <p>I am creating a scaffold -</p>
  
  <pre><code>rails g scaffold Contact email:string email_provider:string 
  </code></pre>
  
  <p>but I want the email provider to be a drop down (with gmail/yahoo/msn as options) and not a text field. How can I do this ? </p>