Polymorphic Question

gistfile1.rb

class Picture < ActiveRecord::Base
  belongs_to :imageable, :polymorphic => true
end
 
class Employee < ActiveRecord::Base
  has_many :pictures, :as => :imageable
end
 
class Product < ActiveRecord::Base
  has_many :pictures, :as => :imageable
end


# vs


class Picture < ActiveRecord::Base
  belongs_to :employee
  belongs_to :product
end
 
class Employee < ActiveRecord::Base
  has_many :pictures
end
 
class Product < ActiveRecord::Base
  has_many :pictures
end