which method is used to generate "Application.config.secret_token = '...'"?

Question

In Rails 3.2, every app's config/secret_token.rb has a secret_token:

ProjectName::Application.config.secret_token = 'c9d1a7ea24444ddf06e4b52a7a08174fc9bc7483727b8ec674d6360f2fb93db007114971feeb1e0f69d6dda595dafb30956b057962aad44a137295128a6d23c0' 

I am curious that which method Rails used to generate the 128-bit code: c9d1a7ea24444ddf06e4b52a7a08174fc9bc7483727b8ec674d6360f2fb93db007114971feeb1e0f69d6dda595dafb30956b057962aad44a137295128a6d23c0 . I tried SecureRandom, but it seems not have such method?

Answer 1

you want SecureRandom.hex(128)

http://www.jamesbadger.ca/2012/12/18/generate-new-secret-token/