Rails宝典八十五式:YAML配置文件

我们的程序中可能有一些参数配置，我们可以将这些配置放在外部YAML文件里而不必污染应用程序代码:
[code]
# config/initializers/load_config.rb
APP_CONFIG = YAML.load_file("#{RAILS_ROOT}/config/config.yml")[RAILS_ENV]

# application.rb
def authenticate
if APP_CONFIG['perform_authentication']
authenticate_or_request_with_http_basic do |username, password|
username == APP_CONFIG['username'] && password == APP_CONFIG['password']
end
end
end

# config/config.yml
development:
perform_authentication: false

test:
perform_authentication: false

production:
perform_authentication: true
username: admin
password: secret
[/code]