文档介绍：Under Construction: The book you’re reading is still under
development. As part of our Beta book program, we’re releasing
this copy well before a normal book would be released. That
way you’re able to get this content a couple of months before
it’s available in finished form, and we’ll get feedback to make
the book even better. The idea is that everyone wins!
Be warned: The book has not had a full technical edit, so it will contain errors.
ßIt has not been copyedited, so it will be full of typos, spelling mistakes, and the
occasional creative piece of grammar. And there’s been no effort spent doing
layout, so you’ll find bad page breaks, over-long code lines, incorrect hyphen-
ation, and all the other ugly things that you wouldn’t expect to see in a finished
book. It also doesn't have an index. We can’t be held liable if you use this book
to try to create a spiffy application and you somehow end up with a strangely
shaped farm implement instead. Despite all this, we think you’ll enjoy it!
Download Updates: Throughout this process you’ll be able to get updated
ebooks from your account at /ount. When the book -
plete, you’ll get the final version (and subsequent updates) from the same ad-
dress.
Send us your feedback: In the meantime, we’d appreciate you sending us your
feedback on this book at /titles/jvrails2/errata, or by using the links
at the bottom of each page.
Thank you for being part of the munity!
Dave & Andy
Crafting Rails 4 Applications
Expert Practices for Everyday Rails Development
Jose Valim
The Pragmatic Bookshelf
Dallas, Texas • Raleigh, North Carolina
Many of the designations used by manufacturers and sellers to distinguish their products
are claimed as trademarks. Where those designations appear in this book, and The Pragmatic
Programmers, LLC was aware of a trademark claim, the designations have been printed in
initial capital letters or in all capitals. The Pragmatic Starter Kit, The Pragmati