title: How can I extend a model with rails?
body: <p>I want to have a general product model that has basic info like name, description, sku number etc. I also want to have another model that is a specific type of product that essentially extends the product model. For example: I'd like to have a clothing model that has additional columns like color, size, etc. </p>
  
  <p>What is the best practice to implement this? I am thinking polymorphism or Single Table Inheritance. Maybe I am going down the wrong path??</p>