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diff --git a/README.rdoc b/README.rdoc index 143fdfeb75..0def4e5d12 100644 --- a/README.rdoc +++ b/README.rdoc @@ -1,30 +1,35 @@ == Welcome to Rails Rails is a web-application framework that includes everything needed to create -database-backed web applications according to the Model-View-Control pattern. - -This pattern splits the view (also called the presentation) into "dumb" -templates that are primarily responsible for inserting pre-built data in between -HTML tags. The model contains the "smart" domain objects (such as Account, -Product, Person, Post) that holds all the business logic and knows how to -persist themselves to a database. The controller handles the incoming requests -(such as Save New Account, Update Product, Show Post) by manipulating the model -and directing data to the view. - -In Rails, the model is handled by what's called an object-relational mapping -layer entitled Active Record. This layer allows you to present the data from -database rows as objects and embellish these data objects with business logic -methods. You can read more about Active Record in its -{README}[link:files/activerecord/README_rdoc.html]. - -The controller and view are handled by the Action Pack, which handles both -layers by its two parts: Action View and Action Controller. These two layers -are bundled in a single package due to their heavy interdependence. This is -unlike the relationship between the Active Record and Action Pack that is much -more separate. Each of these packages can be used independently outside of -Rails. You can read more about Action Pack in its -{README}[link:files/actionpack/README_rdoc.html]. - +database-backed web applications according to the {Model-View-Controller (MVC)}[http://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93controller] pattern. + +Understanding the MVC pattern is key to understanding Rails. MVC divides your application +into three layers, each with a specific responsibility. + +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). + +The Model layer represents your domain model (such as Account, Product, Person, Post) +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 ActiveModel module. You can read more about Active Record in its +{README}[link:/rails/rails/blob/master/activerecord/README.rdoc]. + +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 manipulate models +and render view templates in order to generate the appropriate HTTP response. + +In Rails, the Controller and View layers are handled together by Action Pack. +These two layers are bundled in a single package due to their heavy interdependence. +This is unlike the relationship between Active Record and Action Pack which are +independent. Each of these packages can be used independently outside of Rails. You +can read more about Action Pack in its {README}[link:/rails/rails/blob/master/actionpack/README.rdoc]. == Getting Started @@ -44,7 +49,7 @@ Rails. You can read more about Action Pack in its Run with <tt>--help</tt> for options. -4. Go to http://localhost:3000/ and you'll see: +4. Go to http://localhost:3000 and you'll see: "Welcome aboard: You're riding Ruby on Rails!" @@ -56,13 +61,15 @@ Rails. You can read more about Action Pack in its * The {Ruby on Rails Guides}[http://guides.rubyonrails.org]. * The {API Documentation}[http://api.rubyonrails.org]. - == Contributing We encourage you to contribute to Ruby on Rails! Please check out the {Contributing to Rails -guide}[http://edgeguides.rubyonrails.org/contributing_to_rails.html] for guidelines about how +guide}[http://edgeguides.rubyonrails.org/contributing_to_ruby_on_rails.html] for guidelines about how to proceed. {Join us}[http://contributors.rubyonrails.org]! +== Travis Build Status {<img src="https://secure.travis-ci.org/rails/rails.png"/>}[http://travis-ci.org/rails/rails] + == License Ruby on Rails is released under the MIT license. + |