Ruby on Rails
- 1. SO FOLKSSO FOLKS WANT TOWANT TO YOUYOU
- 3. SO, RUBY IS...SO, RUBY IS... A dynamic programming language Focused on simplicity and productivity Has an elegant syntax Natural to read and easy to write
- 4. THE IDEALS OF IT’S CREATORTHE IDEALS OF IT’S CREATOR “ Ruby is simple in appearance, but is very complex inside, just like our human body Yukihiro “Matz” Matsumoto Ruby is a language of careful balance Blended of Perl, Smalltalk, Eiffel, Ada, and Lisp Language that balanced functional programming with imperative programming
- 5. RUBY’S GROWTHRUBY’S GROWTH Released in 1995 Achieved mass acceptance in 2006 Ranked among the top 10 on most of the indices that measure the growth and popularity of programming languages worldwide
- 6. DEMAND OF RUBYDEMAND OF RUBY graph by TIOB E
- 7. EVERYTHING IS AN OBJECTEVERYTHING IS AN OBJECT “ I wanted a scripting language that was more powerful than Perl, and more object-oriented than Python Yukihiro “Matz” Matsumoto In Ruby, everything is an object Object-oriented programming calls properties by the name instance variables and actions are known as methods Ruby follows the influence of the language by giving methods and instance variables to all of its types Smalltalk
- 8. 5.times { print "We *love* Ruby -- it's outrageous!n" }
- 9. RUBY’S FLEXIBILITYRUBY’S FLEXIBILITY Ruby is seen as a flexible language It allows its users to freely alter its parts Essential parts can be removed/redefined, at will Existing parts can be added upon Ruby tries not to restrict the coder
- 10. class Numeric def plus(x) self.+(x) end end y = 5.plus 6 Use the readable word plus to Ruby’s builtin Numeric class
- 11. BUILT WITH RUBYBUILT WITH RUBY AND RAILSAND RAILS
- 12. AND NOWAND NOW
- 13. WHAT IS RAILS ?WHAT IS RAILS ? A web application framework written in Ruby Uses model–view–controller (MVC) Provides structures for database/web service/pages JSON or XML for data transfer Rails emphasizes the use of: convention over configuration (CoC) active record pattern don't repeat yourself (DRY)
- 14. A WORD ABOUT ARA WORD ABOUT AR (Active Record) active record pattern is architectural pattern This is approach to accessing data in a database Interface of this pattern would include: Insert Update Delete + properties that correspond to columns in underlying database table / /
- 15. SO...SO... In AR database table or view is wrapped into a class Object instance is tied to a single row in the table Object created = new row is added to the table Object updated = row is also updated Object implements accessor methods for each column in the table Object removed = row removed too
- 16. C# FELLAS MAY CHECKOUT ACTIVEC# FELLAS MAY CHECKOUT ACTIVE RECORD IMPLEMENTATION BYRECORD IMPLEMENTATION BY CASTLECASTLE PROJECTPROJECT::
- 17. OKAYOKAY LETS GET IT INSTALLEDLETS GET IT INSTALLED
- 18. FOR LINUXFOR LINUX Or via Ruby Version Manager (RVM) $ sudo apt-get install ruby-full $ curl -sSL https://get.rvm.io | bash -s stable $ rvm install ruby $ rvm use ruby --default $ rvm rubygems current Simply EASY AS HELL Finally $ gem install rails
- 19. FOR WINDOWSFOR WINDOWS For God's (and your nerves) sake: Go to: Click most inconspicuous button 1. 2. Like this one AND JUST RUN GODDAMN INSTALLATIONAND JUST RUN GODDAMN INSTALLATION
- 20. FINALLYFINALLY Check all things are installed successfully $ ruby -v ruby 2.0.0p (2015-04-13) IF SO - WE'RE GOOD TO GO $ gem -v 2.4.8 $ rails -v Rails 4.2.3 $ sqlite3 --version 3.8.11.1 2015-07-15....
- 21. LETS SCAFFOLD !LETS SCAFFOLD ! Create new Rails project in folder `blog` $ rails new blog Install all dependency gems $ bundle install $ cd blog Enter project folder Run Rails server $ rails server $ rails sor
- 23. WELCOME ABOARDWELCOME ABOARD Folder Description /app controllers, models, views and assets for application /config Application's routes, database, etc. /db Contains database schema and migrations /public Static files and compiled assets /test Unit tests and fixtures /tmp Cache, pid, and session files /vendor Place for all third-party code
- 24. LETS CLARIFY DOES RAILS USE WHAT STACK
- 25. eRuby Instead of plain JS To make CSS debugging even more fun Templating system similar to ASP, JSP and PHP Quite unexpected, isn't it ? & To compile into plain JS
- 26. COFFEESCRIPTCOFFEESCRIPT If you ever wondered how it work square = (x) -> x * x cube = (x) -> square(x) * x alert square 2 var cube, square; square = function(x) { return x * x; }; cube = function(x) { return square(x) * x; }; alert(square(2)); CoffeeScript JavaScript
- 27. RAILS CLIRAILS CLI There are a few commands of everyday usage. In the order of how much you'll use them are: rails console rails server rake rails generate rails dbconsole rails new app_name All commands can run with -h or --help to list more information.
- 28. GENERATEGENERATE $ bin/rails generate controller Greetings hello create app/controllers/greetings_controller.rb route get "greetings/hello" invoke erb create app/views/greetings create app/views/greetings/hello.html.erb invoke test_unit create test/controllers/greetings_controller_test.rb invoke helper create app/helpers/greetings_helper.rb invoke assets invoke coffee create app/assets/javascripts/greetings.js.coffee invoke scss create app/assets/stylesheets/greetings.css.scss
- 29. WE GET THISWE GET THIS class GreetingsController < ApplicationController def hello @message = "Hello, how are you today?" end end app/controllers/greetings_controller.rb <h1>A Greeting for You!</h1> <p><%= @message %></p> app/views/greetings/hello.html.erb
- 30. RAILS `SCAFFOLD`RAILS `SCAFFOLD` A scaffold in Rails is a full set of: AS A MORE SUITABLE TOOL FOR GENERATING STUFF model database migration for the model controller
- 31. FOR EXAMPLEFOR EXAMPLE $ bin/rails generate scaffold HighScore game:string score:integer invoke active_record create db/migrate/20130717151933_create_high_scores.rb create app/models/high_score.rb invoke test_unit create test/models/high_score_test.rb create test/fixtures/high_scores.yml invoke resource_route route resources :high_scores invoke scaffold_controller create app/controllers/high_scores_controller.rb invoke erb create app/views/high_scores create app/views/high_scores/index.html.erb create app/views/high_scores/edit.html.erb create app/views/high_scores/show.html.erb create app/views/high_scores/new.html.erb create app/views/high_scores/_form.html.erb ... ... invoke test_unit create test/controllers/high_scores_controller_test.rb invoke helper create app/helpers/high_scores_helper.rb invoke jbuilder create app/views/high_scores/index.json.jbuilder create app/views/high_scores/show.json.jbuilder invoke assets invoke coffee create app/assets/javascripts/high_scores.js.coffee invoke scss create app/assets/stylesheets/high_scores.css.scss invoke scss identical app/assets/stylesheets/scaffolds.css.scss
- 32. AND RAKEAND RAKE Rake is a Make-like program implemented in Ruby. Except tasks and dependencies are specified in standard Ruby syntax. WE USE RAILS FOR:WE USE RAILS FOR: Running db migrations Seeding database with preset data Getting list of all routes Running test
- 33. LETS FIND OUT WHAT WE CAN RAKELETS FIND OUT WHAT WE CAN RAKE Simply typing: $ bin/rake --tasks We get: rake about # List versions of all Rails frameworks and the environment rake assets:clean # Remove old compiled assets rake assets:clobber # Remove compiled assets rake assets:precompile # Compile all the assets named in config.assets.precompile rake db:create # Create the database from config/database.yml for the current Rails.en ... rake log:clear # Truncates all *.log files in log/ to zero bytes rake middleware # Prints out your Rack middleware stack ... rake tmp:clear # Clear session, cache, and socket files from tmp/ rake tmp:create # Creates tmp directories for sessions, cache, sockets, and pids
- 34. AND THATS ALLAND THATS ALL
- 35. CHECKOUT `HELLO WORLD` REPOCHECKOUT `HELLO WORLD` REPO
- 36. FURTHER LEARNINGFURTHER LEARNING Ruby Rails GREAT SCREENCASTS:GREAT SCREENCASTS: https://mackenziechild.me/12-in-12/
- 37. THANK YOU !THANK YOU !