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Ruby on Rails

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Merge pull request #14821 from jonatack/patch-5

Fix code indentation and improve formatting
latest commit 0044bfb188
Arthur Nogueira Neves arthurnn authored April 20, 2014
Octocat-spinner-32 actionmailer Fix MailerPreview broken tests March 15, 2014
Octocat-spinner-32 actionpack Make URL escaping more consistent April 20, 2014
Octocat-spinner-32 actionview Remove wrapper div for inputs in button_to April 17, 2014
Octocat-spinner-32 activemodel Autoload ActiveModel::StrictValidationFailed April 16, 2014
Octocat-spinner-32 activerecord `@destroyed` should always be set to `false` when an object is duped. April 19, 2014
Octocat-spinner-32 activesupport Merge pull request #14805 from akshay-vishnoi/structure-change April 19, 2014
Octocat-spinner-32 ci Add ActionView to CI June 20, 2013
Octocat-spinner-32 guides Fix code indentation and improve formatting April 20, 2014
Octocat-spinner-32 railties Make console and generators blocks works at Application instance level April 14, 2014
Octocat-spinner-32 tasks Fix release task March 31, 2014
Octocat-spinner-32 tools Removing Gem.source_index [ci skip] July 13, 2013
Octocat-spinner-32 .gitignore Updated link to to GitHub article about ignoring files [ci skip] May 05, 2013
Octocat-spinner-32 .travis.yml add services: memcache to travis April 09, 2014
Octocat-spinner-32 .yardopts Let YARD document the railties gem September 09, 2010
Octocat-spinner-32 Add info about contributing to docs to June 06, 2013
Octocat-spinner-32 Gemfile depend_on_asset is not required anymore on sprockets-rails 2.1.2 April 09, 2014
Octocat-spinner-32 RAILS_VERSION update version to 4.2.0.alpha February 23, 2014
Octocat-spinner-32 Use SVG version of travis build status badge [skip ci] April 06, 2014
Octocat-spinner-32 RELEASING_RAILS.rdoc Changed 'so' to 'see' April 02, 2014
Octocat-spinner-32 Rakefile Fix task comment to match which file should be changed March 25, 2014
Octocat-spinner-32 install.rb actionview should be able to install using install.rb [ci skip] July 09, 2013
Octocat-spinner-32 load_paths.rb require "rubygems" is obsolete in Ruby 1.9.3 May 13, 2012
Octocat-spinner-32 rails.gemspec Make possible to use sprockets-rails 2.1 April 04, 2014
Octocat-spinner-32 version.rb Introduce `Rails.gem_version` March 05, 2014

Welcome to Rails

Rails is a web-application framework that includes everything needed to create database-backed web applications according to the Model-View-Controller (MVC) pattern.

Understanding the MVC pattern is key to understanding Rails. MVC divides your application into three layers, each with a specific responsibility.

The Model layer represents your domain model (such as Account, Product, Person, Post, etc.) and encapsulates the business logic that is specific to your application. In Rails, database-backed model classes are derived from ActiveRecord::Base. Active Record allows you to present the data from database rows as objects and embellish these data objects with business logic methods. Although most Rails models are backed by a database, models can also be ordinary Ruby classes, or Ruby classes that implement a set of interfaces as provided by the Active Model module. You can read more about Active Record in its README.

The Controller layer is responsible for handling incoming HTTP requests and providing a suitable response. Usually this means returning HTML, but Rails controllers can also generate XML, JSON, PDFs, mobile-specific views, and more. Controllers load and manipulate models, and render view templates in order to generate the appropriate HTTP response. In Rails, incoming requests are routed by Action Dispatch to an appropriate controller, and controller classes are derived from ActionController::Base. Action Dispatch and Action Controller are bundled together in Action Pack. You can read more about Action Pack in its README.

The View layer is composed of "templates" that are responsible for providing appropriate representations of your application's resources. Templates can come in a variety of formats, but most view templates are HTML with embedded Ruby code (ERB files). Views are typically rendered to generate a controller response, or to generate the body of an email. In Rails, View generation is handled by Action View. You can read more about Action View in its README.

Active Record, Action Pack, and Action View can each be used independently outside Rails. In addition to them, Rails also comes with Action Mailer (README), a library to generate and send emails; and Active Support (README), a collection of utility classes and standard library extensions that are useful for Rails, and may also be used independently outside Rails.

Getting Started

  1. Install Rails at the command prompt if you haven't yet:

    gem install rails
  2. At the command prompt, create a new Rails application:

    rails new myapp

    where "myapp" is the application name.

  3. Change directory to myapp and start the web server:

    cd myapp
    rails server

    Run with --help or -h for options.

  4. Using a browser, go to http://localhost:3000 and you'll see: "Welcome aboard: You're riding Ruby on Rails!"

  5. Follow the guidelines to start developing your application. You may find the following resources handy:


We encourage you to contribute to Ruby on Rails! Please check out the Contributing to Ruby on Rails guide for guidelines about how to proceed. Join us!

Code Status

  • Build Status


Ruby on Rails is released under the MIT License.

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