ActiveRecord::Base.send(:descendants) doesn't return all models unless touched

Question

Update: This problem no longer exists in Rails 3.2

I am trying to get an array containing all the models in my rails 3 application. I am trying:

ActiveRecord::Base.send(:descendants)

for the same. A similar discussion happened in the question: Is there a way to get a collection of all the Models in your Rails app?. As pointed out in one of the answers, we need to touch the models for the models to show up. That is precisely the problem I am facing.

There are more than a dozen models in my rails app, but

ActiveRecord::Base.send(:descendants) 

returns an array of size two. The array has just User and ActiveRecord::SessionStore::Session models. I don't get the other models untill I touch the model by touching, say invoking Comment.new How can I get all the models listed without touching all the models?

Another additional piece of information that might be useful is that I am using devise for authentication. Maybe devise is doing things in a desired way as far as User model is concerned and I am not doing those things with the other models.

Thanks a lot in advance.

Answer 1

If cache_classes is on (by default it's on in development, not in production), run this first:

Rails.application.eager_load!

Answer 2

You need to load the models first:

Dir[Rails.root + "app/models/**/*.rb"].each do |path|
    require path
end