Question

I need to create reusable Devise extension. This is my first experience of creating gems. So, according sources of other Devise extensions, i’ve started with creating file devise_sms_authenticatable.rb in ‘lib’ folder with following code:

# encoding: utf-8
unless defined?(Devise)
  require 'devise'
end

Devise.add_module :sms_authenticatable, :model => 'devise_sms_authenticatable/model'

Also, i’ve created folder devise_sms_authenticatable in the ‘lib’ folder, and added model.rb with code:

# encoding: utf-8
module Devise
  module Models
    module SmsAuthenticatable
      # ...
    end
  end
end

After all i’ve added my new extension to the User model.

class User << ActiveRecord::Base
  devise ..., :sms_authenticatable
end

But application falls with error uninitialized constant Devise::Models::SmsAuthenticatable (NameError). What i’m doing wrong?

Answer 1

If you’re putting the SmsAuthenticatable module already on Devise::Models, there is no need to add it through add_module, though you may need to require it on config/initializers/devise (if you’re writing a gem, you may avoid this, since you will not touch devise.rb on initializers).

You can also write its code without Devise::Models in your gem lib directory and only add this line

Devise.add_module :sms_authenticatable, :model => 'sms_authenticatable'

And Devise should add the module.