Server-side Web development via Ruby on Rails
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Ruby on Rails is an open-source web application framework used to build database-backed web applications according to the MVC pattern. It provides conventions for building applications, including generators to create the database schema and controller actions. The framework emphasizes convention over configuration and is based on the Ruby programming language.
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Introduction to Rails - presented by Arman Ortega
Introduction to Rails - presented by Arman Ortegaarman o This document provides an introduction to Ruby on Rails presented by Arman Ortega. It outlines what will be covered including an overview of Ruby and Rails, the concept of convention over configuration in Rails, and performing CRUD (create, read, update, delete) operations. It then demonstrates creating a sample blog application in Rails and provides links for additional learning resources.
Rubyonrails 090715105949-phpapp01
Rubyonrails 090715105949-phpapp01sagaroceanic11 This document provides an overview of the Ruby on Rails web application framework. It discusses that Rails is a full-stack framework that follows the model-view-controller pattern and uses Ruby as its programming language. It was created by David Heinemeier Hansson in 2004 and uses conventions like separating data, presentation, and control logic into the model, view, and controller layers respectively. The document also provides high-level information on Rails' object-relational mapping, database persistence, and conventions over configuration approach.
Supa fast Ruby + Rails
Supa fast Ruby + RailsJean-Baptiste Feldis This document provides a fast-paced introduction to Ruby, Rails, and additional technologies. It begins with an overview of Ruby basics, syntax, and uses beyond scripts. It then covers Rails fundamentals including MVC architecture, scaffolding, models, views, controllers, and routes. Additional topics discussed include gems, Git, and deploying to Heroku. The document concludes by outlining a sample project to build a marketplace for buying and selling robot spare parts.
Ruby On Rails Tutorial
Ruby On Rails Tutorialsunniboy This document provides an introduction and overview of Ruby on Rails, including what it is, its key features and benefits, and how to get started building a basic web application with Rails. Some of the key points covered include Rails' emphasis on productivity through conventions over configuration, scaffolding, and its implementation of the MVC framework and full-stack capabilities. Examples are also given of generating a controller and view to output basic text and dynamic content.
Introduction to Ruby on Rails
Introduction to Ruby on RailsAlessandro DS This presentation introduces Ruby on Rails (RoR) to students at Università di Catania, detailing its components and structure, including MVC architecture and key principles like 'convention over configuration'. It explains the creation of a web application, using a phrasal book as a practical example, covering routing, controllers, views, and models. The document emphasizes hands-on coding and encourages project work for better understanding.
Introduction To Rails
Introduction To RailsEric Gruber Ruby on Rails is a web framework built on Ruby that aims to make web development simpler and more enjoyable. It was extracted from the Basecamp project management tool. Rails emphasizes conventions over configurations, separating concerns into models, views, and controllers, and following patterns that reduce repetition. Developers can get started with Rails by downloading the Ruby language and using resources like books, screencasts, and online communities to learn more. Popular hosting providers that support Rails include Heroku, Slicehost, and Dreamhost.
Rubyonrails 120409061835-phpapp02
Rubyonrails 120409061835-phpapp02sagaroceanic11 Ruby is a dynamic, reflective, general-purpose programming language while Rails is a model-view-controller (MVC) web application framework built on Ruby. Rails was designed to optimize programmer happiness and promote conventions over configurations. It provides full-stack capabilities including object-relational mapping and tools for database management, frontend interface development, and testing. Rails aims to make web development faster and easier.
Ruby On Rails
Ruby On Railsiradarji Ruby on Rails is an open-source web application framework for the Ruby programming language. It is designed to make programming web applications faster and easier by taking advantage of Ruby's features and using conventions over configurations. Ruby on Rails uses the Model-View-Controller pattern and includes tools to generate scaffolding for models and views to help speed up development. It was created by David Heinemeier Hansson and is now one of the most popular frameworks for developing database-backed web applications.
Ruby on Rails
Ruby on Railsarunv Ruby on Rails is an open-source full-stack web application framework developed by David Heinemeier Hansson, initially for the Basecamp application. It emphasizes principles like DRY (Don't Repeat Yourself) and convention over configuration, facilitating rapid application development with extensive support for testing, code generation, and various database systems. Supported by companies such as Google and IBM, Ruby on Rails runs on multiple platforms including Linux, Windows, and macOS.
Rubyon Rails
Rubyon RailsKevin Gisi This document provides an introduction and overview of Ruby on Rails. It discusses what Ruby and Rails are, how the MVC framework works in Rails, common Rails conventions like RESTful routing and URLs, tools that support Rails development, how Rails applications are typically structured on the server-side, examples of sites built with Rails, and 2-3 minute introductions to key Ruby and Rails concepts like objects, classes, methods, blocks, models, controllers, views, and helpers.
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- 1. Ruby on RailsServer-side web development VladStoianVictor Porof
- 2. What we’ll talk aboutWhat is Ruby on Rails?A brief historyMVC architecture in a nutshellDistinctive framework featuresWhy Ruby? Why Rails?Demo
- 3. What is RoR?Open SourceAbstraction providing generic server-side functionalityUsed for web application developmentIt’s a framework for the Ruby language..so don’t confuse it with plain Ruby!
- 4. A brief historyOriginates in David Heinemeier Hansson’s workFirst released in July 2004Apple ships RoR with Mac OS X Leopard since 2007Major new developments with v2.3 in 2009TemplatesGenerate skeleton applicationsCustom gems and configurationsLatest: v3.0.5, 27 February 2011
- 5. MVC architectureRoR is based on the Model-View-Controller designIt’s an architectural development patternWidely used in many other frameworks:Oracle Application Framework, Cocoon, JSF (Java)ASP.NET (C#)SproutCore, JavascriptMVC (Javascript)Django, Pylons (Python)CakePHP(PHP)PureMVC (many languages)
- 7. MVC on RailsModels are Ruby classes, used to store and validate dataHandles migrationsThey talk to databasesMySQLSQLitePostgreSQLNoSQLMongoDBCassandra“Chubby guy in the back room” crunching the numbers
- 8. Model snippetclass Person < ActiveRecord::Basevalidates_presence_of :namehas_many :wifesendPerson.create(:name => ”Muhammad Ali”).valid? # => truePerson.create(:name => nil).valid? # => false
- 9. Migration snippetclass AddReceiveNewsletterToUsers < ActiveRecord::Migrationdefself.upchange_table :users do |t|t.boolean :receive_newsletter, :default => false endUser.update_all ["receive_newsletter = ?", true] enddefself.downremove_column :users, :receive_newsletter endend
- 10. MVC on RailsWhat the user seesHTML, CSS, XML, Javascript (jQuery)JSON, RSS, AtomAutomatically generated “view-puppets”Visual representation of dataDoes not have direct access to the model!It shouldn’t do lots of processing or calculation
- 11. View snippet <!-- app/views/items/new.rhtml --> <%= form_tag :action => “create” %> Name: <%= text_field“item”, “name”%><br/>Email: <%= text_field“item”, ”email”%><br/> Password: <%= hidden_field “item”, “password”%><br/> <%= submit_tag %> <%= end_form_tag %>
- 12. MVC on RailsGateway between the model and the viewHandles user requestsDoes parsing and data submissionsTakes care of sessions, cookiesWorks out what data to show and what views to render”The best controller: it gives orders without knowing (or caring) how it gets done”
- 13. Controller snippetclassItemsController < ApplicationController def edit @item = Item.find(params[:id])ifrequest.post? @item.update_attributes(params[:item])redirect_to :action => 'edit', :id => @item.id end end end
- 14. MVC on RailsTo summarize:Keep your view code skinnyKeep your controller code skinnyThe fatness is in the model
- 15. Distinctive framework featuresCode generatorsAwesome built-in functions => rapid developmentTons of “gems” to choose fromCross-platform compatibilityAutomated operation (CRUD)Create, Retrieve, Automate and DeleteSimplified testing (Rake script)
- 16. Code generator snippet#model generator (general)ruby script/generate model model_name #(in v2.3)rails generate model model_name #(in v3)#model generator (example)rails generate model user name:stringhashed_password:string#controller generator (general)ruby script/generate controller controller_namemethod_name(s) (in v2.3)rails generate controller controller_namemethod_name(s) (in v3)#controller generator (example)rails generate controller store index
- 17. RoR serversMongrelWebbrickThinApache (mod_passanger)..so it’s very scalable!
- 18. Famous projects on RailsTwitter (microblogging)Crunchbase (companies database)BaseCamp (project management)Hulu (online tv)Yellowpages.com (phone database)Xing (business network)
- 19. Why Ruby?Interpreted language => greater flexibilityProvides JIT (just in time compilation)Garbage collectionAble to generate code on the flyCleaner syntax (no more “Verbose verbose is too verbose for verbose”)Many implementations:Jruby, IronRuby, Rubinius(Ruby + C++), MacRuby (ObjC)
- 20. Why Rails?Based on RubyEasy to implement CGI scriptsRapid web-application developmentDesigned to make programming work easierLess coding, more functionalityThousands of pluginsDon’t reinvent the wheel
- 22. Creating a blog with