Chad Fowler "Rails Recipes"(Repost)

Rails is large, powerful, and new. How do you use it effectively? How do you harness the power? And, most important, how do you get high quality, real-world applications written?
From the latest Ajax effects to time-saving automation tips for your development process, Rails Recipes will show you how the experts have already solved the problems you have.
Use generators to automate repetitive coding tasks.
Create sophisticated role-based authentication schemes.
Add live search and live preview to your site.
Run tests when anyone checks code in.