Everything you need to know to install Rails and create your first application.

This guide covers how you can use Active Record migrations to alter your database in a structured and organized manner.

This guide covers all the associations provided by Active Record.

This guide covers the find method defined in ActiveRecord::Base, as well as named scopes.

This guide covers the basic layout features of Action Controller and Action View, including rendering and redirecting, using content_for blocks, and working with partials.

Guide to using built in Form helpers.

This guide covers the user-facing features of Rails routing. If you want to understand how to use routing in your own Rails applications, start here.

This guide covers how controllers work and how they fit into the request cycle in your application. It includes sessions, filters, and cookies, data streaming, and dealing with exceptions raised by a request, among other topics.

This guide covers the three types of caching that Rails provides by default.

This is a rather comprehensive guide to doing both unit and functional tests in Rails. It covers everything from “What is a test?” to the testing APIs. Enjoy.

This guide describes common security problems in web applications and how to avoid them with Rails.

This guide describes how to debug Rails applications. It covers the different ways of achieving this and how to understand what is happening "behind the scenes" of your code.

This guide covers ways to analyze and optimize your running Rails code.

This guide covers how to build a plugin to extend the functionality of Rails.