Rails one-to-one relationship

Question

I have the following:

class User < ActiveRecord::Base
  has_one :car, :class_name => \'Car\', :foreign_key => \'user_id\'

class Car < ActiveRecord::         


        

Answer 1

why don't you just test before the user tries to add a car?

if worker.car
 raise "sorry buddy, no car for you"
else
 car = Car.create(user_id: worker.id)
end