# FIXME add a real multipart key to waytags so that we can do eager loadin
belongs_to :way, :foreign_key => 'id'
+
+ validates_presence_of :id
+ validates_length_of :k, :v, :maximum => 255, :allow_blank => true
+ validates_uniqueness_of :id, :scope => :k
+ validates_numericality_of :id, :only_integer => true
end