Configurando API Ruby do Pagseguro por environment

pagseguro.rb

PagSeguro.configure do |config|
  configuration       = Rails.application.config_for(:pagseguro)
  config.email        = configuration['email']
  config.token        = configuration['token']
  config.environment  = configuration['environment']
  config.encoding     = configuration['encoding']
end

pagseguro.yml

development:
  email:        'youremail'
  token:        'yourtoken'
  environment:  :sandbox
  encoding:     'UTF-8'

production:
  email:        'youremail'
  token:        'yourtoken'
  environment:  :production
  encoding:     'UTF-8'