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class << ActiveRecord::Base
  def concerns(*args)
    args.each do |concern|
      require_dependency "#{name.underscore}/#{concern}"
    end
  end
end

				
		

		

	
	





app/models/user.rb 





	
	

		

		

			
				
				

					
		
		
class User < ActiveRecord::Base
  concerns :authentication, :memberships

				
		

		

	
	





app/models/user/authentication.rb 





	
	

		

		

			
				
				

					
		
		
class User
  # Virtual attribute for the unencrypted password
  attr_accessor :password