n<--extra_column-->n relationships...

rubyonrails-talk
1

You are describing a "has_many :through" relationship.

class FlavoursPacks < ActiveRecord::Base   belongs_to :flavour   belongs_to :pack end

class Flavour < ActiveRecord::Base   has_many :flavours_packs   has_many :packs, :through => :flavours_packs end

class Pack < ActiveRecord::Base   has_many :flavours_packs   has_many :flavours, :through => :flavours_packs end

Then you can access flavours_packs from either direction and call methods on those objects.

somePack.flavours_packs[0].article_number

-- James