class CreditCard < ActiveRecord::Base belongs_to :brand_manager, class_name: 'User' end class User < ActiveRecord::Base has_many :credit_cards, foreign_key: 'brand_manager_id' end
It is used like this:
User in this context would be too generic. In the domain-specific language of
this application, the people with credit cards are referred to as “brand
Why not name the model
In this case,
User is overloaded to handle three different roles using simple
flags on the model. This allows us to use
Clearance normally and keeps
authentication and standard
user vocabulary available where it makes sense.
class Impression < ActiveRecord::Base belongs_to :campaign, class_name: 'Offer' end
In this example, the object plays two different roles depending on to whom it
is being displayed. The object is an
offer to recipients but its Role
campaign to advertisers and impressions.
Learn more about Role Suggesting Name in Philippe Hanrigou’s talk, What the Ruby craftsman can learn from the Smalltalk master.