class OldWayTag < ActiveRecord::Base
+ self.table_name = "way_tags"
+ self.primary_keys = "way_id", "version", "k"
+
+ belongs_to :old_way, :foreign_key => [:way_id, :version]
+
+ validates_presence_of :old_way
+ validates_length_of :k, :maximum => 255, :allow_blank => true
+ validates_uniqueness_of :k, :scope => [:way_id, :version]
+ validates_length_of :v, :maximum => 255, :allow_blank => true
end