# WITHOUT cached_models
class Author < ActiveRecord::Base
  has_many :posts
  has_many :comments, :through => :posts
  
  def full_name
    @full_name ||= [ first_name, last_name ].join(" ")
  end
end

class Post < ActiveRecord::Base
  belongs_to :author
  has_many :comments
  has_many :tags, :as => :taggable
end

class Comment < ActiveRecord::Base
  belongs_to :post
end

class Tag < ActiveRecord::Base
  belongs_to :taggable, :polymorphic => true
end

# WITH cached_models
class CachedAuthor < ActiveRecord::Base
  has_many :cached_posts, :cached => true
  has_many :cached_comments, :through => :cached_posts, :cached => true
  
  def full_name
    @full_name ||= [ first_name, last_name ].join(" ")
  end
end

class CachedPost < ActiveRecord::Base
  belongs_to :cached_author, :cached => true
  has_many :cached_comments, :cached => true
  has_many :cached_tags, :as => :taggable, :cached => true
end

class CachedComment < ActiveRecord::Base
  belongs_to :cached_post, :cached => true
end

class CachedTag < ActiveRecord::Base
  belongs_to :taggable, :polymorphic => true, :cached => true
end