Agile Web Development with Rails, Edition 4

26.2 HAML 25.2 rake

26.1 Active Merchant

Determine if a credit card is valid

edit Gemfile
gem 'activemerchant'
bundle install
Using rake (10.0.3) 
Using i18n (0.6.1) 
Using minitest (4.6.1) 
Using multi_json (1.6.1) 
Using atomic (1.0.1) 
Using thread_safe (0.1.0) 
Using tzinfo (0.3.35) 
Using activesupport (4.0.0.beta) 
Using builder (3.1.4) 
Using erubis (2.7.0) 
Using rack (1.5.2) 
Using rack-test (0.6.2) 
Using actionpack (4.0.0.beta) 
Using mime-types (1.21) 
Using polyglot (0.3.3) 
Using treetop (1.4.12) 
Using mail (2.5.3) 
Using actionmailer (4.0.0.beta) 
Using active_utils (1.0.5) 
Using json (1.7.7) 
Using money (5.1.1) 
Using nokogiri (1.5.6) 
Using activemerchant (1.31.0) 
Using activemodel (4.0.0.beta) 
Using activerecord-deprecated_finders (0.0.3) 
Using arel (3.0.2.20120819075748) 
Using activerecord (4.0.0.beta) 
Using activeresource (4.0.0.beta) 
Using bcrypt-ruby (3.0.1) 
Using bundler (1.3.0.pre.8) 
Using highline (1.6.15) 
Using net-ssh (2.6.5) 
Using net-scp (1.1.0) 
Using net-sftp (2.1.1) 
Using net-ssh-gateway (1.2.0) 
Using capistrano (2.14.2) 
Using coffee-script-source (1.4.0) 
Using execjs (1.4.0) 
Using coffee-script (2.2.0) 
Using rdoc (3.12.1) 
Using thor (0.17.0) 
Using railties (4.0.0.beta) 
Using coffee-rails (4.0.0.beta) 
Using hike (1.2.1) 
Using jbuilder (1.0.2) 
Using jquery-rails (2.2.1) 
Using mysql2 (0.3.11) 
Using tilt (1.3.3) 
Using sprockets (2.8.2) 
Using sprockets-rails (2.0.0.rc2) 
Using rails (4.0.0.beta) 
Using sass (3.2.6) 
Using sass-rails (4.0.0.beta) 
Using sqlite3 (1.3.7) 
Using turbolinks (1.0.0) 
Using uglifier (1.3.0) 
Updating files in vendor/cache
Could not find activesupport-4.0.0.beta.gem for installation
mkdir script
edit script/creditcard.rb
credit_card = ActiveMerchant::Billing::CreditCard.new(
  number:     '4111111111111111',
  month:      '8',
  year:       '2009',
  first_name: 'Tobias',
  last_name:  'Luetke',
  verification_value:  '123' 
)
 
puts "Is #{credit_card.number} valid?  #{credit_card.valid?}"
rails runner script/creditcard.rb
Is 4111111111111111 valid?  false

26.2 HAML 25.2 rake