Rails - Nov 2012 - Keep all validations inside a single ActiveModel::Validator class

Hi!

I plan to use ActiveModel::Validator to validate a plain Ruby class, but
I have intention to keep all validations outside the original class,
while using PresenceValidator and FormatValidator, default on Rails.
Something like this:

# payer.rb
module MyMoip
  class Payer
    include ActiveModel::Validations

    attr_accessor :id, :name, :email,
                  :address_street, :address_street_number,
:address_street_extra,
                  :address_neighbourhood, :address_city, :address_state,
                  :address_country, :address_cep, :address_phone

    validates_with Validators::PayerValidator
  end
end

# payer_validator.rb
module MyMoip
  module Validators
    class PayerValidator < ActiveModel::Validator

      validate :id, presence: true

      def validate(record)
        # more complex validations
      end
    end
  end
end


It is possible?

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