Upgrading to Rails 4 covers each change and guides you through the tweaks you'll need to make for a smooth upgrade.
Upgrading to Rails 4 covers the features you'll want to be aware of when modernizing existing applications.
Upgrading to Rails 4 covers specific scenarios you may encounter with upgrading and what to do when come across them.
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matchmay be affected
vendor/are no longer automatically precompiled
ActionController::Livefor live streaming
bin/and checked into source control (
Upgrading to Rails 4 covers the major deprecations and new features in Rails 4.0.0.rc1. You will also receive updates (via email) as Rails 4.0.0 final nears.
If you purchase Upgrading to Rails 4 and are not satisfied, email me and I will issue you a refund.
Some chapters in the book use the rails4_upgrade gem, a free/open-source project I started to make certain elements of the upgrade process easier. Check it out and let me know what you think.
Thanks to these folks who are looking over the book's content for technical accuracy and overall flow:
bin/, Rails 4 no longer uses the
:assetsgroup in Gemfile, encrypted cookies have changed slightly since 4.0.0.beta1,
dalliis required to use memcached.
strong_parameterscan raise an exception in development mode,
validates_confirmation_ofadds error messages to the _confirmation field.