validates :k, :v, :allow_blank => true, :length => { :maximum => 255 }, :characters => true
validates :k, :uniqueness => { :scope => :changeset_id }
end
validates :k, :v, :allow_blank => true, :length => { :maximum => 255 }, :characters => true
validates :k, :uniqueness => { :scope => :changeset_id }
end