Hello all!
I just published a leanpub book on how to upgrade your Rails 3
application
to Rails 4. It covers all new features introduced in Rails 4 and
contains
the deprecated features as well. You can follow along with an included
upgrade checklist to see if you upgraded all breaking changes from Rails
3
to Rails 4.
You can get it over here: Upgrade to Rails 4 by Philip De Smedt [Leanpub PDF/iPad/Kindle].
Feedback
and suggestions are very welcome. Thanks!
Cheers,
Philip