When first introduced to Ruby on Rails, we really liked what we were seeing. Clearly,
Ruby on Rails was a powerful and intuitive framework that would make us more productive in
our daily work. In our enthusiasm for the newfound tool, we began applying Ruby on Rails to
many of our existing projects??”and those words, ???existing projects,??? are key here. They are at
the root of our motivation to write this book.
Active Record can be deceptively simple to use in an environment that you develop around
Ruby on Rails from the very beginning. But sooner or later, you??™ll run into a database that??™s
been designed without Active Record in mind, or you??™ll need to design a database yourself that
doesn??™t conform to all of Active Record??™s defaults. And that??™s where this book comes in. Many,
if not all of the books about Ruby on Rails that we have read assume that you will only be building
a stand-alone Rails application from scratch. But this isn??™t the case for us! It probably won??™t
be the case for you either. We saw a clear need for a book to help developers take full advantage
of the Ruby on Rails framework while continuing to use legacy databases that their other business
applications depend on.
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