Building Application With Ruby On Rails Framework
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The document provides information about learning Ruby on Rails from Edureka including contact details. It outlines the objectives of understanding Rails framework features, MVC architecture and building applications. It also summarizes the history and advantages of Ruby as a programming language and how Rails applications use the MVC pattern and conventions over configuration approach.
Building Application With Ruby On Rails Framework
- 1. www.edureka.co/ruby-on-rails View Ruby On Rails course details at http://www.edureka.co/ruby-on-rails For Queries: Post on Twitter @edurekaIN: #askEdureka Post on Facebook /edurekaIN For more details please contact us: US : 1800 275 9730 (toll free) INDIA : +91 88808 62004 Email us : [email protected] Building Application With Ruby On Rails Framework
- 2. Slide 2 www.edureka.co/ruby-on-rails Objectives At the end of this module, you will be able to understand: Introduction to Ruby on Rails Framework Features of Ruby on Rails MVC Architecture Building Rails Application
- 3. Slide 3 www.edureka.co/ruby-on-rails 9 Reasons Why You Should Learn Ruby It is easy to learn Saves time by writing more with less Create web apps quickly and with ease It is free of charge Ruby can be customized
- 4. Slide 4 www.edureka.co/ruby-on-rails 9 Reasons Why You Should Learn Ruby (Contd.) It is Portable Learning Ruby helps you get a job Make your own Domain Specific Language The community will help DSL
- 5. Slide 5Slide 5Slide 5 www.edureka.co/ruby-on-rails History Ruby released in 1993 It was designed by Yukihiro Matsumoto. It’s mainly influenced by the predecessors Perl, Smalltalk, Eiffel, Ada and Lisp
- 6. Slide 6Slide 6Slide 6 www.edureka.co/ruby-on-rails Ruby – An Overview Ruby is an Object Oriented Programming language It is an interpreted language Ruby draws from Smalltalk, Perl and Lisp It treats everything as an object Ruby has simple English like syntax Using Ruby you will write less code
- 7. Slide 7Slide 7Slide 7 www.edureka.co/ruby-on-rails Ruby on Rails Ruby on Rails is a full-stack framework » Used to developing web applications » It is working under the Model-View-Control pattern » It is an open source framework Ruby on Rails framework is familiar for » Simplicity » Productivity » Speed of development » Reliable Solutions
- 8. Slide 8Slide 8Slide 8 www.edureka.co/ruby-on-rails Ruby on Rails – Reason behind the name Ruby is the programming language used to implement the framework The entire Rails Framework is written in Ruby Rails is the framework that gives the necessary infrastructure Ruby provides Simple Syntax and Productive coding Ruby on Rails lets you write efficient web application using convention over configuration
- 9. Slide 9 www.edureka.co/ruby-on-rails Ruby 1.0 Dec, 1996 Ruby 1.2 Dec , 1997 Ruby 1.4 Aug , 1999 Ruby 1.6 Ruby 1.8 Sept , 2000 Aug, 2003 Ruby 1.9 Dec, 2007 Ruby 2.0 Feb , 2013 Ruby 2.1 Dec, 2013 Ruby Versions Ruby 2.2 Apr, 2015 We will be using Ruby 2.1.6 in this course.
- 10. Slide 10 www.edureka.co/ruby-on-rails Ruby is a popular language in the league of Python, Perl, PHP Ruby is Object-Oriented in the purest sense and has flexible Object model than any other languages Its is available on Windows/Mac/Linux Learning Ruby helps to work on Ruby on Rails, an open source web application framework that is used to create web applications It also has a dynamic type system and automatic memory management Advantages
- 11. Slide 11Slide 11Slide 11 www.edureka.co/ruby-on-rails Examples of Application built on Ruby on Rails
- 12. Slide 12Slide 12Slide 12 www.edureka.co/ruby-on-rails Rails Golden Rules Convention over configuration(COC) » COC means that the developer should only be specifying unconventional aspects of the application. Ruby on Rails conventions guides you to less code and less repetition Don’t Repeat Yourself (DRY) » DRY means that information can be found in a single and common location, where the developer can reuse the code
- 13. Slide 13Slide 13Slide 13 www.edureka.co/ruby-on-rails Rails Architecture Rails applications are implemented using the Model-View-Controller (MVC) Model will be denoted as ActiveRecord » Back end Database and Tables will be handled by ActiveRecord View will be denoted as ActionView » HTML and Front end tools will be handled by ActionView Controller will be denoted as ActionController » Request and responses will be handled by ActionController
- 14. Slide 14Slide 14Slide 14 www.edureka.co/ruby-on-rails MVC Architecture
- 15. Slide 15Slide 15Slide 15 http://www.edureka.co/ruby-on-rails Rails application can be created using the following command >rails new app_name When you create an application using the rails helper script, you can see that a new directly structure is created for your application. The directory structure will have to following directories that will be explained in the next slide. Creating a Rails Application
- 16. Slide 16Slide 16Slide 16 http://www.edureka.co/ruby-on-rails Directory Layout File /Folder Purpose app/ Contains the controllers, models, views, helpers, mailers and assets for your application. bin/ Contains the rails script that starts your app and can contain other scripts you use to deploy or run your application. config/ Configure your application's routes, database, and more condig.ru Rack configuration for Rack based servers used to start the application. db/ Contains your current database schema, as well as the database migrations Gemfile Gemfile.lock These files allow you to specify what gem dependencies are needed for your Rails application. These files are used by the Bundler gem. Lib/ Extended modules for you application Log/ Application log files
- 17. Slide 17Slide 17Slide 17 http://www.edureka.co/ruby-on-rails Directory Layout (Contd.) File /Folder Purpose public/ The only folder seen by the world as-is. Contains static files and compiled assets. Rakefile This file locates and loads tasks that can be run from the command line. Rather than changing Rakefile, you should add your own tasks by adding files to the lib/tasks directory of your application README.rdoc This is a brief instruction manual for your application. You should edit this file to tell others what your application does, how to set it up, and so on. test/ Unit tests, fixtures, and other test apparatus. tmp/ Temporary files (like cache, pid, and session files). Vendor/ A place for all third-party code. In a typical Rails application this includes vendor’s gems.
- 18. Slide 18Slide 18Slide 18 http://www.edureka.co/ruby-on-rails Rails application can be booted using the following command >rails server This command will fire up WEBrick, a web server distributed with Ruby. » Default environment is development » Default port is 3000 » http://127.0.0.1:3000 Running Rails Application
- 19. Slide 19Slide 19Slide 19 http://www.edureka.co/ruby-on-rails To see your application in action, open a browser window and navigate to http://localhost:3000 Running Rails Application (Contd.)
- 20. Slide 20Slide 20Slide 20 http://www.edureka.co/ruby-on-rails Creating Rails Views and Controller Create first controller >rails generate controller home Create new file and store with name index.html.erb >rails g controller home index Add the content to index.html.erb file <h1>Hello, Rails!</h1> Open the file config/routes.rb in your editor. Remove the comment “#” and change root to # root ‘home#index'
- 21. Slide 21Slide 21Slide 21 http://www.edureka.co/ruby-on-rails Creating Rails Views and Controller (Contd.) Launch the web server again and navigate to http://localhost:3000 in your browser.
- 22. Slide 22 www.edureka.co/ruby-on-rails Questions For Queries: Post on Twitter @edurekaIN: #askEdureka Post on Facebook /edurekaIN