Upgrading To Rails 4

An e-book covering the deprecations, new features and common upgrading scenarios facing developers upgrading from Rails 3 to Rails 4.

Originally written by Andy Lindeman and now released under CC BY 3.0.

Where should you go from here?

• Build the book yourself.
• Contribute to the book. Pull requests accepted.

Build Toolchain

kitabu can export ePub and HTML by default.

$ bundle install
$ bundle exec kitabu export
$ ls output/

As you're hacking on the book, you can have it generate automatically:

$ bundle exec guard

PDF

PrinceXML is required to build the PDF version of the book. A trial version is available at princexml.com.

mobi

KindleGen is required to build the mobi version of the book. KindleGen can be downloaded from Amazon.