Contents

module BraintreeRails
  class Luhn10Validator < ActiveModel::EachValidator
    def validate_each(record, attribute, value)
      return unless record.errors[attribute].blank?
      record.errors.add(attribute, 'failed Luhn 10 validation') if invalid_luhn_10_number?(value)
    end

    private
    def invalid_luhn_10_number?(number)
      number.to_s.split('').reverse.each_slice(2).sum{|odd, even| [odd, even.to_i*2].join.split('').sum(&:to_i) } % 10 != 0
    end
  end
end

Version data entries

8 entries across 8 versions & 1 rubygems

Version	Path
braintree-rails-1.4.1	lib/braintree_rails/luhn10_validator.rb
braintree-rails-1.4.0	lib/braintree_rails/luhn10_validator.rb
braintree-rails-1.3.0	lib/braintree_rails/luhn10_validator.rb
braintree-rails-1.2.3	lib/braintree_rails/luhn10_validator.rb
braintree-rails-1.2.2	lib/braintree_rails/luhn10_validator.rb
braintree-rails-1.2.1	lib/braintree_rails/luhn10_validator.rb
braintree-rails-1.2.0	lib/braintree_rails/luhn10_validator.rb
braintree-rails-1.1.0	lib/braintree_rails/luhn10_validator.rb