Polymorphic associations

0_output.log

u.recently_viewed_items

[#<ListItem id: 2459209, list_id: 655831, listable_type: "Product", listable_id: 84303, created_at: "2013-12-13 11:19:07", updated_at: "2013-12-13 11:19:07">, #<ListItem id: 2459208, list_id: 655831, listable_type: "Product", listable_id: 84543, created_at: "2013-12-13 11:19:02", updated_at: "2013-12-13 11:19:02">, #<ListItem id: 2459207, list_id: 655831, listable_type: "Product", listable_id: 84403, created_at: "2013-12-13 11:18:57", updated_at: "2013-12-13 11:18:57">, #<ListItem id: 2459206, list_id: 655831, listable_type: "Product", listable_id: 84553, created_at: "2013-12-13 11:18:51", updated_at: "2013-12-13 11:18:51">, #<ListItem id: 2459205, list_id: 655831, listable_type: "Product", listable_id: 84413, created_at: "2013-12-13 11:18:45", updated_at: "2013-12-13 11:18:45">, #<ListItem id: 2459203, list_id: 655831, listable_type: "Product", listable_id: 84373, created_at: "2013-12-13 11:01:49", updated_at: "2013-12-13 11:18:25">]

favorite.rb

require_dependency 'list'

class List::Favorite < List
  
end

list.rb

class List < ActiveRecord::Base

  belongs_to :user
  has_many :list_items
  
end

list_item.rb

class ListItem < ActiveRecord::Base

  belongs_to :list
  belongs_to :listable, :polymorphic => true

end

recently_viewed.rb

require_dependency 'list'

class List::RecentlyViewed < List

  default_scope -> { order("updated_at desc") }
  
end

user.rb

class User < ActiveRecord::Base
  
  has_one :favorite, :class_name => "List::Favorite"
  has_one :recently_viewed, :class_name => "List::RecentlyViewed"

  has_many :recently_viewed_items, :through => :recently_viewed, :source => :list_items
  has_many :favorite_items, :through => :favorite, :source => :list_items
  
end