How do you list all of the autoload paths in Rails?
In Rails console when I do this, it only lists the custom paths added to the config:
$ rails c
Loading development environment (Rails 3.2.9)
1.9.3p194 :001 > MyRailsApp::Application.config.autoload_paths
=> []
You can access all the autoload paths through ActiveSupport::Dependencies.autoload_paths
Invoke it from console or run rails r 'puts ActiveSupport::Dependencies.autoload_paths' from command line.
More info here (For Rails 4, but it applies to Rails 3 as well): http://guides.rubyonrails.org/autoloading_and_reloading_constants.html#autoload-paths
Update: please see Laura's answer using ActiveSupport::Dependencies.autoload_paths below. I've left this answer here as an alternate method.
In Rails::Engine which is included in the Rails application's module, there is the following method:
def _all_autoload_paths
@_all_autoload_paths ||= (config.autoload_paths + config.eager_load_paths + config.autoload_once_paths).uniq
end
So, you could either do:
(MyRailsApp::Application.config.autoload_paths + MyRailsApp::Application.config.eager_load_paths + MyRailsApp::Application.config.autoload_once_paths).uniq
or:
[:autoload_paths, :eager_load_paths, :autoload_once_paths].collect{|m|MyRailsApp::Application.config.send(m)}.flatten.uniq
or just:
MyRailsApp::Application._all_autoload_paths
The default result in Rails 3.2.9 is:
["/path/to/my_rails_app/app/assets", "/path/to/my_rails_app/app/controllers", "/path/to/my_rails_app/app/helpers", "/path/to/my_rails_app/app/mailers", "/path/to/my_rails_app/app/models"]
This should include all the autoload paths that were added by other gems and custom load paths.
Rails.application.instance_variable_get(:"@_all_autoload_paths")
