c2901eb084
The [deprecated secrets removal][1] ended up removing a bit of non-deprecated functionality related to config.secret_key_base: - the original implementation prioritized the value of config.secret_key_base over other sources in all environments - if unset, the value of config.secret_key_base would be updated to whichever fallback value was found The new implementation only sets config.secret_key_base to a fallback value when Rails.env.local?, and never considers it at all in production. This commit aims to restore this missing functionality as well as simplify the implementation: - Rails.application.secret_key_base now always delegates to config.secret_key_base (like the pre-secret-removal implementation) - secret_key_base validation was moved from the reader to the writer - config.secret_key_base now handles setting itself to a fallback value when unset - In addition, generate_local_secret was simplified because it previously did 3 things: file manipulation, setting config.secret_key_base, and returning a value. Now it only creates the file if necessary and returns the value stored in it The new implementation has an additional benefit, which is that manually set config.secret_key_base values are now validated, whereas previously only fallback values were validated. [1]: 0c76f17f2dbf0d7ad90c890e6f334743cacce41f Co-authored-by: Petrik <petrik@deheus.net> |
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activemodel | ||
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activestorage | ||
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guides | ||
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CODE_OF_CONDUCT.md | ||
CONTRIBUTING.md | ||
Gemfile | ||
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MIT-LICENSE | ||
package.json | ||
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rails.gemspec | ||
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README.md | ||
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version.rb | ||
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.
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.
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.
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
- 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
-
Install Rails at the command prompt if you haven't yet:
$ gem install rails
-
At the command prompt, create a new Rails application:
$ rails new myapp
where "myapp" is the application name.
-
Change directory to
myapp
and start the web server:$ cd myapp $ bin/rails server
Run with
--help
or-h
for options. -
Go to
http://localhost:3000
and you'll see the Rails bootscreen with your Rails and Ruby versions. -
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.