Transition from the traditional Rails model-view-controller trio to an abstraction model and let your application codebase evolve with synchronized components, boosting flexibility and maintainability. Purchase of the print or Kindle book includes a free PDF eBook through the link provided within Key Features Understand Rails' architectural patterns along with its advantages and disadvantages Organize business logic in Rails apps when the default approach is insufficient Introduce new abstractions to address design problems Book DescriptionRuby on Rails is an open-source framework for building web applications from scratch while focusing on productivity, leveraging the power of the convention-over-configuration principle, and the well-defined model-view-controller pattern, assisting the developers in building useful features. However, this initial simplicity often leads to uncontrollable complexity turning the well-structured codebase into a hardly maintainable mess. This book aims to help you keep the code maintainable while working on a Rails application. You’ll start by exploring the framework capabilities and principles, allowing you to reap the full potential of Rails. Then, you’ll tackle many common design problems by discovering useful patterns and abstraction layers. By implementing abstraction and dividing the application into manageable modules, you’ll be able to concentrate on specific parts of the app development without getting overwhelmed by the entire codebase. This strategy also encourages code reuse, simplifying the process of adding new features and enhancing the application's capabilities. Additionally, you’ll explore further steps in scaling Rails codebase, such as service extractions. By the end of this book, you’ll be a code design specialist with a deep understanding of the Rails framework principles.What you will learn Discover Rails' core components and its request/response cycle Understand Rails' convention-over-configuration principle and its impact on development Explore patterns for flexibility, extensibility, and testability in Rails Identify and address Rails' anti-patterns for cleaner code Implement design patterns for handling bloated models and messy views Expand from mailers to multi-channel notification deliveries Explore different authorization models and layers Use a class-based approach to configuration in Rails Who this book is for This book is for Rails application developers facing challenges in managing the growing complexity of their projects. It offers practical strategies for maintaining code readability and manageability, providing valuable guidance for developers at all levels. Whether you've recently launched your first Rails minimum viable product or are struggling to progress with a sizable monolithic application, this book is here to help. A deep understanding of core Rails principles is a must. Some experience in building web applications using the Rails framework will enhance your comprehension and application of the concepts presented in the book.

"Domain-Driven Design" incorporates numerous examples in Java-case studies taken from actual projects that illustrate the application of domain-driven design to real-world software development.

Praise for Design Patterns in Ruby "Design Patterns in Ruby documents smart ways to resolve many problems that Ruby developers commonly encounter. Russ Olsen has done a great job of selecting classic patterns and augmenting these with newer patterns that have special relevance for Ruby. He clearly explains each idea, making a wealth of experience available to Ruby developers for their own daily work." —Steve Metsker, Managing Consultant with Dominion Digital, Inc. "This book provides a great demonstration of the key 'Gang of Four' design patterns without resorting to overly technical explanations. Written in a precise, yet almost informal style, this book covers enough ground that even those without prior exposure to design patterns will soon feel confident applying them using Ruby. Olsen has done a great job to make a book about a classically 'dry' subject into such an engaging and even occasionally humorous read." —Peter Cooper "This book renewed my interest in understanding patterns after a decade of good intentions. Russ picked the most useful patterns for Ruby and introduced them in a straightforward and logical manner, going beyond the GoF's patterns. This book has improved my use of Ruby, and encouraged me to blow off the dust covering the GoF book." —Mike Stok "Design Patterns in Ruby is a great way for programmers from statically typed objectoriented languages to learn how design patterns appear in a more dynamic, flexible language like Ruby." —Rob Sanheim, Ruby Ninja, Relevance Most design pattern books are based on C++ and Java. But Ruby is different—and the language's unique qualities make design patterns easier to implement and use. In this book, Russ Olsen demonstrates how to combine Ruby's power and elegance with patterns, and write more sophisticated, effective software with far fewer lines of code. After reviewing the history, concepts, and goals of design patterns, Olsen offers a quick tour of the Ruby language—enough to allow any experienced software developer to immediately utilize patterns with Ruby. The book especially calls attention to Ruby features that simplify the use of patterns, including dynamic typing, code closures, and "mixins" for easier code reuse. Fourteen of the classic "Gang of Four" patterns are considered from the Ruby point of view, explaining what problems each pattern solves, discussing whether traditional implementations make sense in the Ruby environment, and introducing Ruby-specific improvements. You'll discover opportunities to implement patterns in just one or two lines of code, instead of the endlessly repeated boilerplate that conventional languages often require. Design Patterns in Ruby also identifies innovative new patterns that have emerged from the Ruby community. These include ways to create custom objects with metaprogramming, as well as the ambitious Rails-based "Convention Over Configuration" pattern, designed to help integrate entire applications and frameworks. Engaging, practical, and accessible, Design Patterns in Ruby will help you build better software while making your Ruby programming experience more rewarding.

A comprehensive guide to building Ruby on Rails apps that can be sustained for many years.

The Complete Guide to Avoiding and Fixing Common Rails 3 Code and Design Problems As developers worldwide have adopted the powerful Ruby on Rails web framework, many have fallen victim to common mistakes that reduce code quality, performance, reliability, stability, scalability, and maintainability. RailsTM AntiPatterns identifies these widespread Rails code and design problems, explains why they’re bad and why they happen—and shows exactly what to do instead. The book is organized into concise, modular chapters—each outlines a single common AntiPattern and offers detailed, cookbook-style code solutions that were previously difficult or impossible to find. Leading Rails developers Chad Pytel and Tammer Saleh also offer specific guidance for refactoring existing bad code or design to reflect sound object-oriented principles and established Rails best practices. With their help, developers, architects, and testers can dramatically improve new and existing applications, avoid future problems, and establish superior Rails coding standards throughout their organizations. This book will help you understand, avoid, and solve problems with Model layer code, from general object-oriented programming violations to complex SQL and excessive redundancy Domain modeling, including schema and database issues such as normalization and serialization View layer tools and conventions Controller-layer code, including RESTful code Service-related APIs, including timeouts, exceptions, backgrounding, and response codes Third-party code, including plug-ins and gems Testing, from test suites to test-driven development processes Scaling and deployment Database issues, including migrations and validations System design for “graceful degradation” in the real world

"The Ruby on Rails 3 Tutorial and Reference Collection" consists of two bestselling Rails eBooks: "Ruby on Rails 3 Tutorial: Learn Rails by Example" by Michael Hartl"The Rails 3 Way" by Obie Fernandez In "Ruby on Rails 3 Tutorial" leading Rails developer Michael Hartl teaches Rails 3 by guiding you through the development of your own complete sample application using the latest techniques in Rails Web development. Drawing on his experience building RailsSpace, Insoshi, and other sophisticated Rails applications, Hartl illuminates all facets of design and implementation-including powerful new techniques that simplify and accelerate development. Hartl explains how each new technique solves a real-world problem and demonstrates this with bite-sized code that's simple enough to understand, yet novel enough to be useful. "The Rails 3 Way" is the only comprehensive, authoritative guide to delivering production-quality code with Rails 3. Pioneering Rails expert Obie Fernandez and a team of leading experts illuminate the entire Rails 3 API, along with the idioms, design approaches, and libraries that make developing applications with Rails so powerful. You learn advanced Rails programming techniques that have been proven effective in day-to-day usage on dozens of production Rails systems. Dive deep into the Rails 3 codebase and discover why Rails is designed the way it is-and how to make it do what you want it to do. This collection helps youInstall and set up your Rails development environmentGo beyond generated code to truly understand how to build Rails applications from scratchLearn Test Driven Development (TDD) with RSpecEffectively use the Model-View-Controller (MVC) pattern Structure applications using the REST architectureBuild static pages and transform them into dynamic onesMaster the Ruby programming skills all Rails developers needDefine high-quality site layouts and data modelsImplement registration and authentication systems, including validation and secure passwordsUpdate, display, and delete users Add social features and microblogging, including an introduction to AjaxRecord version changes with Git and share code at GitHubSimplify application deployment with HerokuLearn what's new in Rails 3Increase your productivity as a Web application developerRealize the overall joy in programming with RailsLeverage Rails' powerful capabilities for building REST-compliant APIsDrive implementation and protect long-term maintainability using RSpecDesign and manipulate your domain layer using Active RecordUnderstand and program complex program flows using Action ControllerMaster sophisticated URL routing conceptsUse Ajax techniques via Rails 3 support for unobtrusive JavaScriptLearn to extend Rails with popular gems and plugins and how to write your own Extend Rails with the best third-party plug-ins and write your ownIntegrate email services into your applications with Action MailerImprove application responsiveness with background processingCreate your own non-Active Record domain classes using Active ModelMaster Rails' utility classes and extensions in Active Support