title: Storing arrays in database using ActiveRecord
body: <p>I am on rails 2.3.8 &amp; I am using mysql as db adapter. 
  I want to store arrays in my database. After searching I could come up with this very useful <a href="http://duanesbrain.blogspot.com/2007/04/ruby-on-rails-persist-array-to-database.html" rel="noreferrer">article</a>.</p>
  
  <p>Now I need to use GUI for input &amp; not only server console. So say I have a text field called nums which logically should have int array. What should be the format of nums so that it becomes easy to retrieve &amp; store the array out of that string ?</p>