- belongs_to :old_relation, :foreign_key => [:relation_id, :version], :inverse_of => :old_tags
+ belongs_to :old_relation, :query_constraints => [:relation_id, :version], :inverse_of => :old_tags
validates :old_relation, :associated => true
validates :k, :v, :allow_blank => true, :length => { :maximum => 255 }, :characters => true
validates :old_relation, :associated => true
validates :k, :v, :allow_blank => true, :length => { :maximum => 255 }, :characters => true