• has_many
  through - Self-referential has_many :through associations
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• has_many :through Self-referential Example » Aldenta: Web Nourishment
  in Ruby/Rails with has_many rails rubyonrails through
• has_many :through: Many-to-many Dance-off!
  in Ruby/Rails with associations has_many rails through
• has_many :through: New on edge: Magic join model creation
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• zetetic
  Social Networking with Rails using ActsAsNetwork
  in Ruby/Rails with actsasnetwork bi-directional has_many self-referential tails through

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