Question

I’m trying to write a Rails 3 rake task to generate config/initializers/secret_token.rb. I want to pull the application’s name instead of hard-coding it in the rake task, but @app_name is not yet populated, nor is ENV['APP_NAME']. Here’s the task’s code:

desc "Regenerate the server secret"
task :generate_secret do
    include ActiveSupport
    File.open('config/initializers/secret_token.rb', 'w') do |f|
        f.puts "#{@app_name}::Application.config.secret_token = '#{SecureRandom.hex(30)}'"
    end
end

It all works except that @app_name is blank. How can I retrieve the application name here?

Answer 1

You need to use the environment in the rake task. Then you can use Rails.application.class.parent_name

desc "Regenerate the server secret"
task :generate_secret => :environment do
  include ActiveSupport
  File.open('config/initializers/secret_token.rb', 'w') do |f|
    f.puts "#{Rails.application.class.parent_name}::Application.config.secret_token = '#{SecureRandom.hex(30)}'"
  end
end