Add Client-Side validation to ActiveResource

client_validated_fields.rb

class User << ActiveResource
  class ClientValidatedFields
    attr_accessor :phone
    include ActiveModel::Validations
    validates :phone, :presence => true, :length => { :maximum => 10, :minimum => 10 }, :numericality => true

    def initialize(*args)
      (args.first.first || {}).each_pair do |k, v|
        send("#{k}=".to_sym, v) if self.respond_to?("#{k}=".to_sym)
      end
    end
  end
  attr_accessor :client_validated_fields
  schema do
    string  :phone
  end

  delegate :phone=, :to => :client_validated_fields
  delegate :phone, :to => :client_validated_fields 

  def require_more_info
    return ! ( client_validated_fields.valid? && valid? )
  end
end