Userstamp is not added when userstamp was not explicitly called

[rjurado01]

I have this test:

RSpec.describe Product do
  it "chech bug" do
    class User
      include Mongoid::Document
      include Mongoid::Userstamp::User
    end

    class Product
      include Mongoid::Document
      include Mongoid::Userstamp
    end

    p = Product.create
    expect(p.created_by).to be eq(nil)
  end
end

This show this error:

  1) Product chech bug
     Failure/Error: p.created_by

     NoMethodError:
       undefined method `created_by' for #<Product _id: 572c8a3f8675c36e39000001, >

The problem that I can see is that this code:

module Mongoid
module Userstamp
  class Railtie < Rails::Railtie
    config.to_prepare do
      Mongoid::Userstamp.model_classes.each do |model_class|
        unless model_class.included_modules.include?(Mongoid::Userstamp::Model)
          model_class.send(:include, Mongoid::Userstamp::Model)
        end
      end
    end

Is executed before Mongoid::Userstamp is included in class:

module Mongoid
  module Userstamp
    extend ActiveSupport::Concern
    included do
      Mongoid::Userstamp.add_model_class(self)
    end
    ...

Then Mongoid::Userstamp.model_classes is equal to []

It is a bug?

[alexwbuschle]

Hey @rjurado01 I tried to set the user_model on the tracked models and that worker.
Just put mongoid_userstamp user_model: 'User' :)