module Dm_Panlex
   class Wc
      include DataMapper::Resource

      storage_names[:default] = 'wc'

      property :wc, Integer, :key => true
      property :dn, Integer, :required => true, :unique_index => :wc_dn_key
      property :ex, Integer, :required => true, :unique_index => :wc_dn_key

      belongs_to :dn, :parent_key => :dn, :child_key  => :dn
      belongs_to :wcex, :parent_key => :ex, :child_key  => :ex
   end
end