Way to load folder as module constant in rails app directory

Question

So have a rails 5 project and would like to load a directory like this

/app
  /services
    /user
      foo.rb

as the constant ::Services::User::Foo

Does anyone have experience in getting rails autoload paths to load the constants in this manner?

---

foo.rb

module Services
  module User
    class Foo

    end
  end
end

SOLUTION

Add this to your application.rb file

config.autoload_paths << Rails.root.join('app')

See discussions here on autoloading

https://github.com/rails/rails/issues/14382#issuecomment-37763348 https://github.com/trailblazer/trailblazer/issues/89#issuecomment-149367035

Answer 1

Auto loading

You need to define Services::User::Foo inside app/services/services/user/foo.rb

If you don't want this weird subfolder duplication, you could also move services to app/models/services or lib/services.

You could also leave foo.rb in app/services/user/foo.rb, but it should define User::Foo.

Eager loading

If you don't need any magic with namespaces and class names, it is pretty straightforward :

Dir[Rails.root.join('app/services/**/*.rb')].each{|rb| require rb}

This will eagerly load any Ruby script inside app/services and any subfolder.