Controllers not being loaded when mounting a Rails Engine

I am currently creating a Rails engine. So far the engine has a few new routes and a few new controllers. The routes work fine, as I was able to mount them adding the following to config/routes.rb:

mount MyEngine::Engine => '/'  

The problem comes with the controllers. When trying to access the actions I have defined, I get:

uninitialized constant MyEngine::ApplicationController  

I am a bit surprised, as the documentation suggests that everything inside app/ is autoloaded from the engine. I have even tried to explicitly load the controllers in engine.rb, to no avail:

module MyEngine    class Engine < ::Rails::Engine      isolate_namespace MyEngine        Dir["#{config.root}/app/controllers/**/"].each do |path|        config.eager_load_paths << path      end    end  end  

I'm confused. Aren't the contents of app/controllers/ supposed to be autoloaded by the application from the engine?

https://stackoverflow.com/questions/65819824/controllers-not-being-loaded-when-mounting-a-rails-engine January 21, 2021 at 09:06AM