How to add a mounted engine to a Rails 3.1 application?

Question

Let's say I created a mounted engine in the ~/my_engine :

 rails plugin new my_engine --mountable 

How to install this engine in a Rails 3.1 application that is at the same directory level (e.g. ~/my_app )?

Answer 1

There is a good process entry here:

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

In short, add this to your main Gemfile application:

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

And run bundle install / bundle update . Add this to the main application

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