Rails 3 - Recursive Relationship - Comments

Question

I'm trying to create a recursive relationship in rails so that comments can have replies (using the same model comment.rb). So basically, a comment has many comments(as replies) and a comment can belong to only one comment.

I have the fk in my migration, but was wondering what needs to be on my comment.rb model.

Is this the proper way?

has_many :comments, :as => :reply
belongs_to :comment

Sorry, just want to make sure I'm doing this the correct way.

Thank you