How to add a mountable engine into a Rails 3.1 app?

Question

Let's say I have created a mountable engine into ~/my_engine folder:

rails plugin new my_engine --mountable

How do I mount this engine into a Rails 3.1 app, that is at the same directory level (eg ~/my_app )?

Answer 1

There is a good writeup of the process here:

http://www.builtfromsource.com/2010/12/13/mountable-engines-in-rails-3-1-beta-getting-started/

In short, add this to your main app's Gemfile :

gem 'my_engine', :path => '../my_engine'

And run bundle install / bundle update . Add this to your main app

mount MyEngine::Engine => '/my-engine-url'