global methods in ruby on rails models

Question

I have methods in all of my models that look like this:

def formatted_start_date
  start_date ? start_date.to_s(:date) : nil
end

I would like

Answer 1

An answer to your comment: You can extract common code/functionality into modules which you include in a class (I belive that is called mixin?) or you can go for subclasses. I don't think subclass is the way to go when its just common functionality you want to get into your objects, and not a real inheritance situation.

Take a look at this for more info on modules and Ruby.