Books in the Addison-Wesley Professional Ruby Series series

When Ruby on Rails was introduced, web developers flocked to it, quickly building applications that have become utterly indispensable to their organisations. But those early Rails applications have often proven extremely difficult to maintain, evolve, and scale. Now, in Component-Based Rails Applications, Stephan Hagemann introduces a practical, start-to-finish methodology for modernising and restructuring existing Rails applications with modern components. One step at a time, Hagemann demonstrates how to revamp Rails applications to exhibit visible, provably independent, and explicitly connected parts--thereby simplifying them, and making them far easier to manage, change, and test. The first and only guide to componentising Rails, this book offers hands-on, step-by-step coverage of Creating a full-fledged component-based Rails application from the ground up Refactoring an existing Rails application to extract components Using gems and engines to implement components in Ruby and Rails code bases Applying modern patterns such as DCI and hexagonal architecture Overcoming the unique challenges that arise during componentisation of Rails applications Throughout, Hagemann introduces concepts and techniques that developers can use to improve applications of many kinds, even if they weren't built with Rails or Ruby.

The Definitive Refactoring Guide, Fully Revamped for Ruby With refactoring, programmers can transform even the most chaotic software into well-designed systems that are far easier to evolve and maintain. What's more, they can do it one step at a time, through a series of simple, proven steps. Now, there's an authoritative and extensively updated version of Martin Fowler's classic refactoring book that utilizes Ruby examples and idioms throughout-not code adapted from Java or any other environment. The authors introduce a detailed catalog of more than 70 proven Ruby refactorings, with specific guidance on when to apply each of them, step-by-step instructions for using them, and example code illustrating how they work. Many of the authors' refactorings use powerful Ruby-specific features, and all code samples are available for download. Leveraging Fowler's original concepts, the authors show how to perform refactoring in a controlled, efficient, incremental manner, so you methodically improve your code's structure without introducing new bugs. Whatever your role in writing or maintaining Ruby code, this book will be an indispensable resource. This book will help you • Understand the core principles of refactoring and the reasons for doing it • Recognize "bad smells” in your Ruby code • Rework bad designs into well-designed code, one step at a time • Build tests to make sure your refactorings work properly • Understand the challenges of refactoring and how they can be overcome • Compose methods to package code properly • Move features between objects to place responsibilities where they fit best • Organize data to make it easier to work with • Simplify conditional expressions and make more effective use of polymorphism • Create interfaces that are easier to understand and use • Generalize more effectively • Perform larger refactorings that transform entire software systems and may take months or years • Successfully refactor Ruby on Rails code