Rails Best Practices | the Law of DemeterAccording to the law of demeter, a model should only talk to its immediate association, don't talk to the association's association and association's property, it is a case of loose coupling. Bad Smell class Invoice < ActiveRecord::Base belongs_to :user end <%= @invoice.user.name %> <%= @invoice.user.address %> <%= @invoice.user.cellphone %> In this example, invoice model calls the association(use
Rails Best Practices | Double-check your migrations
