Rails%203%20In%20Action

Summary
We got into the nitty-gritty of adding configuration options to your engine, as well
as a module called Forem::UserExtensions, which configured the two models in your
engine with new associations. This module is exceptionally interesting, as it allows you
to configure the engine’s behavior regardless of the class that it’s included into.
We then covered releasing your engine as a gem, which is the best way to get it out
into the world.
In the final chapter, we look at how you can write lightweight applications using
Rack and Sinatra, and hook them into your Rails application. In Rails 3, that’s become
easier than ever to do.
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