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Ruby on Rails
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Jonathan Hefner 73c0266fd6
Merge pull request #41509 from m-antis/main
use proper style name snake_form for table naming convention [ci-skip]
2021-02-23 10:01:44 -06:00
.github Rename master to main in all code references 2021-01-19 20:46:33 +00:00
actioncable Fix inline code markup [ci-skip] 2021-02-14 11:20:35 -06:00
actionmailbox Rails 6.2 is now Rails 7.0 2021-02-04 16:47:16 +00:00
actionmailer Rails 6.2 is now Rails 7.0 2021-02-04 16:47:16 +00:00
actionpack Allow passing anything with #to_str into redirect_to 2021-02-22 23:30:28 +00:00
actiontext Remove require "active_support/core_ext/symbol/starts_ends_with" 2021-02-09 22:31:09 +09:00
actionview Simplify formmethod checks on button_to for non-GET/POST handling 2021-02-22 10:08:48 -03:00
activejob Fix inline code markup [ci-skip] 2021-02-14 11:20:35 -06:00
activemodel Add uncountable? method to ActiveModel::Name 2021-02-18 09:55:29 +03:00
activerecord Merge pull request #41528 from yahonda/pg_where_with_set 2021-02-23 21:13:55 +09:00
activestorage Extract ActiveStorage::Streaming so your own controllers can use it (#41440) 2021-02-19 15:40:56 +01:00
activesupport Fix proxying keyword arguments for ActiveSupport::CurrentAttributes. 2021-02-22 17:42:48 +01:00
ci
guides use proper styling name (snake_form) for table naming convention 2021-02-20 17:15:02 -05:00
railties test case to illustrate isolated engine inheritance issue 2021-02-16 11:55:22 -08:00
tasks Fix a rubocop offence for Lint/ErbNewArguments 2021-02-05 12:39:58 +09:00
tools Fix bin/test 2020-10-30 21:33:19 +00:00
.gitattributes
.gitignore Gitignore Brewfile.lock.json 2020-12-07 14:58:17 +01:00
.rubocop.yml Extract ActiveStorage::Streaming so your own controllers can use it (#41440) 2021-02-19 15:40:56 +01:00
.yardopts
.yarnrc
Brewfile
CODE_OF_CONDUCT.md
CONTRIBUTING.md Adding badges and logo to README and CONTRIBUTING page 2021-01-20 10:53:47 +01:00
Gemfile Use released redis-namespace instead of master branch 2021-02-22 18:49:24 +09:00
Gemfile.lock Use released redis-namespace instead of master branch 2021-02-22 18:49:24 +09:00
MIT-LICENSE Bump license years to 2021 [ci skip] 2021-01-01 12:21:20 +09:00
package.json
rails.gemspec Rails 7 requires Ruby 2.7 and prefer Ruby 3+ 2021-02-04 16:34:53 +00:00
RAILS_VERSION Rails 6.2 is now Rails 7.0 2021-02-04 16:47:16 +00:00
Rakefile
README.md Adding badges and logo to README and CONTRIBUTING page 2021-01-20 10:53:47 +01:00
RELEASING_RAILS.md Rename master to main in all code references 2021-01-19 20:46:33 +00:00
version.rb Rails 6.2 is now Rails 7.0 2021-02-04 16:47:16 +00:00
yarn.lock

Welcome to Rails

What's 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: Model, View, and Controller, each with a specific responsibility.

Model layer

The Model layer represents the domain model (such as Account, Product, Person, Post, etc.) and encapsulates the business logic 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.

Controller layer

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.

View layer

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.

Frameworks and libraries

Active Record, Active Model, Action Pack, and Action View can each be used independently outside Rails. In addition to that, Rails also comes with Action Mailer, a library to generate and send emails; Action Mailbox, a library to receive emails within a Rails application; Active Job, a framework for declaring jobs and making them run on a variety of queuing backends; Action Cable, a framework to integrate WebSockets with a Rails application; Active Storage, a library to attach cloud and local files to Rails applications; Action Text, a library to handle rich text content; and Active Support, 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
     $ bin/rails server
    

    Run with --help or -h for options.

  4. Go to http://localhost:3000 and you'll see: "Yay! Youre on Rails!"

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

Contributing

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!

Trying to report a possible security vulnerability in Rails? Please check out our security policy for guidelines about how to proceed.

Everyone interacting in Rails and its sub-projects' codebases, issue trackers, chat rooms, and mailing lists is expected to follow the Rails code of conduct.

License

Ruby on Rails is released under the MIT License.