active record two stage validation

ar_validation.rb

module CertoPay
  module ActiveRecord
    extend ActiveSupport::Concern

    module ClassMethods
      def validate_further(*args, &block)
        options = args.extract_options!

        options = options.dup
        options[:if] = Array.wrap(options[:if])
        options[:if].unshift("errors.size == 0")

        args << options

        after_validation *args, &block
      end
    end
  end
end