self.table_name = "way_tags"
self.primary_keys = "way_id", "version", "k"
belongs_to :old_way, :foreign_key => [:way_id, :version]
validates :old_way, :presence => true, :associated => true
self.table_name = "way_tags"
self.primary_keys = "way_id", "version", "k"
belongs_to :old_way, :foreign_key => [:way_id, :version]
validates :old_way, :presence => true, :associated => true