Hi all,
I was hoping someone could please clarify the differences between a full engine and a mountable one.
I have noticed the following:
** Full Engine ** - With a full engine, the parent application inherits the routes from the engine. It is not necessary to specify anything in parent_app/ config/routes.rb. Specifying the gem in Gemfile is enough. The engine routes are specified as:
# my_engine/config/routes.rb Rails.application.routes.draw do # whatever end
- No namespacing of models, controllers, etc. These are immediately accessible to the parent application.
** Mountable Engine ** - The engine's namespace is isolated by default.
# my_engine/lib/my_engine/engine.rb module MyEngine class Engine < Rails::Engine isolate_namespace MyEngine end end
- With a mountable engine, the routes are namespaced and the parent app can bundle this functionality under a single route:
# my_engine/config/routes.rb MyEngine::Engine.routes.draw do #whatever end
# parent_app/config/routes.rb Rails.application.routes.draw do mount MyEngine::Engine => "/engine", :as => "namespaced" end
- Models, controllers, etc are isolated from the parent application - although helpers can be shared easily.
Is this correct and are these the main differences? Are there any other differences between a full and mountable engine that I missed?
Thanks, Adam
