Introduction to Ruby on Rails

Presentation at University of Piraeus

Transcript

1. INTRODUCTION - to -
2. Angel Avgerinos Ruby on Rails & Java developer
3. RUBY A multi-paradigm general purpose language
4. Yukihiro Matsumoto (Matz) Creator of Ruby programming language (1995)
5. What Ruby is
6. OBJECT - ORIENTED Everything in Ruby is an object (instance of a Class)
7. FUNCTIONAL Supports Lambdas and Procs
8. REFLECTIVE Ruby can modify the structure of an object at runtime
9. IMPERATIVE Modules and Blocks
10. Why Ruby rocks
11. OPEN SOURCE https://github.com/ruby/ruby
12. READABLE AND SEXY No semicolons, no mandatory parentheses, method chaining.
13. TREND RIGHT NOW 2nd most popular language at Github.com
14. CHECK THIS OUT
15. class  Calc      #  Creates  getters  and  setters  for  num1  and  num2    attr_accessor  :num1,  :num2        def  initialize(num1,  num2)        @num1  =  num1        @num2  =  num2    end      def  add        #string  interpolation        puts  "#{@num1  +  @num2}"      end end   c  =  Calc.new(1,2) c.add
16. WHAT ABOUT LIBRARIES ?
17. Gem A package format for Ruby programs and libraries
18. The structure of a Gem
19. INSTALLING GEMS from RubyGems.org gem install gem_name
20. Let’s take it to the next level Just type...
21. gem install rails Now you have superpower
22. Ruby on Rails MVC framework to get you on the Web
23. David Heinemeier Hansson (DHH) Creator of Ruby on Rails (2004) and partner at 37signals
24. What Rails is
25. GEM Just a Gem with reusable code! No fancy installs!
26. OPEN SOURCE https://github.com/rails/rails
27. FRAMEWORK A Web application framework.
28. MVC Awesome pattern.
29. What Rails is NOT
30. What Rails is NOT A Programming language
31. AWESOMENESS MVC
32. MODEL VIEW CONTROLLER View Controller Model Database
33. MODEL
34. CONTROLLER
35. VIEW
36. STARTING A NEW RAILS PROJECT
37. rails new app_name TYPE...
38. RAILS APP STRUCTURE
39. /APP
40. /CONFIG
41. GEMFILE Where your life becomes easier
42. source  'https://rubygems.org'   gem  'rails',  '3.2.12' group  :development,  :test  do    gem  'sqlite3' end   group  :assets  do    gem  'sass-­‐rails',      '~>  3.2.3'    gem  'coffee-­‐rails',  '~>  3.2.1'    gem  'uglifier',  '>=  1.0.3'    gem  'compass-­‐rails'    gem  'sassy-­‐buttons'    gem  'bootstrap-­‐sass',  '~>  2.3.0.1'    gem  'font-­‐awesome-­‐sass-­‐rails' end   gem  'jquery-­‐rails'   gem  'omniauth-­‐facebook' gem  'devise',  '2.2.3' gem  'geocoder'
43. A GLIMPSE OF RAILS
44. SCAFFOLDING rails g scaffold User email:string
45. MIGRATION rake db:migrate
46. RAILS SERVER rails s
47. DONE!
48. HOW TO GET STARTED
49. tryruby.org codeschool.com codecademy.com railstutorial.org/book railscasts.com github.com RESOURCES
50. THANKS @eavgerinos evaggelos.avgerinos@gmail.com