Advice on rating system

Hi, I'm doing a simple rating system, but I need and advice on the controllers. My system rates article.

Should I add an action rate in the article controller or should I create a rate controller and add the action create? What's the cleanest way?

Greg

What models and relationships do you have? I ask because it is not clear whether a rating is just an attribute of an article or whether an article has many ratings, so that a Rating is a model in it's own right.

Colin