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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. Rails™ 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
About the Authors xix
Chapter 1: Models 1
AntiPattern: Voyeuristic Models 2
AntiPattern: Fat Models 14
AntiPattern: Spaghetti SQL 31
AntiPattern: Duplicate Code Duplication 50
Chapter 2: Domain Modeling 73
AntiPattern: Authorization Astronaut 74
AntiPattern: The Million-Model March 79
Chapter 3: Views 89
AntiPattern: PHPitis 91
AntiPattern: Markup Mayhem 107
Chapter 4: Controllers 117
AntiPattern: Homemade Keys 118
AntiPattern: Fat Controller 123
AntiPattern: Bloated Sessions 154
AntiPattern: Monolithic Controllers 161
AntiPattern: Controller of Many Faces 167
AntiPattern: A Lost Child Controller 170
AntiPattern: Rat’s Nest Resources 180
AntiPattern: Evil Twin Controllers 184
Chapter 5: Services 189
AntiPattern: Fire and Forget 190
AntiPattern: Sluggish Services 195
AntiPattern: Pitiful Page Parsing 197
AntiPattern: Successful Failure 201
AntiPattern: Kraken Code Base 207
Chapter 6: Using Third-Party Code 211
AntiPattern: Recutting the Gem 213
AntiPattern: Amateur Gemologist 214
AntiPattern: Vendor Junk Drawer 216
AntiPattern: Miscreant Modification 217
Chapter 7: Testing 221
AntiPattern: Fixture Blues 223
AntiPattern: Lost in Isolation 236
AntiPattern: Mock Suffocation 240
AntiPattern: Untested Rake 246
AntiPattern: Unprotected Jewels 251
Chapter 8: Scaling and Deploying 267
AntiPattern: Scaling Roadblocks 268
AntiPattern: Disappearing Assets 271
AntiPattern: Sluggish SQL 272
AntiPattern: Painful Performance 282
Chapter 9: Databases 291
AntiPattern: Messy Migrations 292
AntiPattern: Wet Validations 297
Chapter 10: Building for Failure 301
AntiPattern: Continual Catastrophe 302
AntiPattern: Inaudible Failures 306