title: Rails - Parent/child relationships
body: <p>I'm currently using a standard one-to-one relationship to handle parent/child relationships:</p>
  
  <pre><code>class Category &lt; ActiveRecord::Base
    has_one :category
    belongs_to :category
  end
  </code></pre>
  
  <p>Is there a recommended way to do it or is this ok?</p>