Devise Secret Key was not set

Question

I am developing a Rails 4 app using the Active Admin gem for the administration back end. Active Admin in turn uses Devise for user authentication. Now, when I try to deploy

Answer 1

As per changelog:

Devise will use the secret_key_base on Rails 4+ applications as its secret_key. You can change this and use your own secret by changing the devise.rb initializer.

I went to config/secrets.yml and changed the production value.

Before:

production: 
  secret_key_base: <%= ENV["SECRET_KEY_BASE"] %>

After:

production: 
  secret_key_base: string of charaters

Of course, that should be set to the environment variable, which I will set later, but this at least got it running. I got my string by using bundle exec rake secret.