title: How to add tagging with autocomplete to an existing model in Rails?
body: <p>I'm trying to add "tags" to an <code>Article</code> model in a Rails 3 application.</p>
  
  <p>I'm wondering if there is a gem or plugin that has adds both the "tagging" functionality in the model and also the auto-complete helpers for the views.</p>
  
  <p>I've found <code>acts_as_taggable</code> but I'm not sure if that's what I should be using. Is there something newer? I'm getting results from 2007 when I google acts_as_taggable</p>