Data modeling in rails: example of has_many :through model associations

gistfile1.rb

class Carrot < ActiveRecord::Base
  has_many :communities
  has_many :rabbits, :through => :communities
end

class Bunny < ActiveRecord::Base
  has_many :communities
  has_many :carrots, :through => :communities
end

class Community < ActiveRecord::Base
  belongs_to :carrot
  belongs_to :bunny
end