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Ruby on Rails
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Hartley McGuire 43f756778f Move comment after newline in installed migrations
When an engine's migration is installed in a rails application, a
comment is inserted after any magic comments indicating the migration's
source. However, the current implementation does not take into
account whether there is an empty line after magic comments, and the
generated migration will not pass rubocop's
Layout/EmptyLineAfterMagicComment even if the engine's migration did.
This commit changes the implementation to insert the new comment after
a newline occuring after magic comments, if it exists.

Example Engine Migration:
```ruby
# frozen_string_literal: true
# coding: ISO-8859-15

class CurrenciesHaveSymbols < ActiveRecord::Migration::Current
end
```

Before change:
```ruby
# frozen_string_literal: true
# coding: ISO-8859-15
# This migration comes from bukkits (originally 1)

class CurrenciesHaveSymbols < ActiveRecord::Migration::Current
end
```

After change:
```ruby
# frozen_string_literal: true
# coding: ISO-8859-15

# This migration comes from bukkits (originally 1)
class CurrenciesHaveSymbols < ActiveRecord::Migration::Current
end
```
2021-08-04 00:52:53 -04:00
.github [ci skip] Mention executable test cases in issue template 2021-06-01 11:51:31 -07:00
actioncable Standardize nodoc comments 2021-07-29 21:18:07 +00:00
actionmailbox Standardize nodoc comments 2021-07-29 21:18:07 +00:00
actionmailer Standardize nodoc comments 2021-07-29 21:18:07 +00:00
actionpack Reduce allocations and retentions in Journey TransitionTable 2021-08-03 14:15:53 +02:00
actiontext Standardize nodoc comments 2021-07-29 21:18:07 +00:00
actionview Add caching? helper method 2021-08-03 15:49:48 -06:00
activejob Standardize nodoc comments 2021-07-29 21:18:07 +00:00
activemodel Standardize nodoc comments 2021-07-29 21:18:07 +00:00
activerecord Move comment after newline in installed migrations 2021-08-04 00:52:53 -04:00
activestorage Standardize nodoc comments 2021-07-29 21:18:07 +00:00
activesupport Standardize nodoc comments 2021-07-29 21:18:07 +00:00
ci chore: Use e.g. which is the more used spelling 2021-07-21 09:17:54 +09:00
guides Standardize nodoc comments 2021-07-29 21:18:07 +00:00
railties Standardize nodoc comments 2021-07-29 21:18:07 +00:00
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 Remove non-project specific entry from gitignore 2021-03-22 22:02:00 +00:00
.rubocop.yml Fix odd closing parenthesis by enabling the Layout/ClosingParenthesisIndentation cop 2021-07-02 18:01:50 +09:00
.yardopts
.yarnrc
Brewfile
CODE_OF_CONDUCT.md
codespell.txt Add spell checking with codespell as a GitHub Action 2021-05-04 14:46:21 +10:00
CONTRIBUTING.md Adding badges and logo to README and CONTRIBUTING page 2021-01-20 10:53:47 +01:00
Gemfile Address bundle exec blade build failure with ruby 3.1.0dev 2021-07-29 13:44:41 +09:00
Gemfile.lock Update globalid to 0.5.1 for ruby-head compatibility 2021-07-27 23:23:13 +02:00
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.