class UserPreference < ActiveRecord::Base
+ self.primary_keys = "user_id", "k"
+
belongs_to :user
+
+ validates_length_of :k, :within => 1..255
+ validates_length_of :v, :within => 1..255
+
+ attr_accessible :k, :v
# Turn this Node in to an XML Node without the <osm> wrapper.
def to_xml_node