Ruby on rails - Reference the same model twice?

Question

Is it possible to set up a double relationship in activerecord models via the generate scaffold command?

For example, if I had a User

Answer 1

Add this to your Model

belongs_to :sender, :class_name => "User"
belongs_to :recipient, :class_name => "User"

And you are able to call @message.sender and @message.recipient and both reference to the User model.

Instead of user:references in your generate command, you'd need sender:references and recipient:references