Intro to Rails

Brief introduction to Rails followed by a workshop.

Presented at: RailsGirls Bogotá 2015

Transcript

1. Intro to Rails Sebastián Sogamoso @sebasoga
2. Intro to Rails What is Rails?
3. Intro to Rails Rails is a framework for creating web applications in Ruby
4. Intro to Rails Rails is a framework for creating web applications in Ruby
5. Intro to Rails Rails is a framework for creating web applications in Ruby
6. Intro to Rails Rails is a framework for creating web applications in Ruby
7. Intro to Rails What is a web page?
8. Intro to Rails
9. Intro to Rails
10. Intro to Rails
11. Intro to Rails
12. Intro to Rails https://railsgirls.com/bogota
13. Intro to Rails https://railsgirls.com/bogota
14. Intro to Rails https://railsgirls.com/bogota Request
15. Intro to Rails https://railsgirls.com/bogota Find file: cities/bogota.html
16. Intro to Rails https://railsgirls.com/bogota <html lang=“eng”> <head> <meta charset=“utf-8”>…
17. Intro to Rails https://railsgirls.com/bogota <html lang=“eng”> <head> <meta charset=“utf-8”>… Response
18. Intro to Rails What is a web application?
19. Intro to Rails
20. Intro to Rails https://www.facebook.com/railsgirls <html lang=“eng”> <head> <meta charset=“utf-8”>… Response Request
21. Intro to Rails m/railsgirls charset=“utf-8”>… • Get list of fans • Get list of comments • Order the comments by date • Get group photos • …
22. Intro to Rails What is Rails?
23. Intro to Rails Rails is a framework for creating web applications in Ruby
24. Intro to Rails How does Rails do that?
25. Intro to Rails By following the this ideas: • MVC pattern • Convention over configuration
26. Intro to Rails MVC Pattern Model View Controller
27. Intro to Rails Model
28. Intro to Rails This class (model) represents a table in the database called “carts”
29. Intro to Rails This class (model) represents a table in the database called “carts” Convention over configuration
30. Intro to Rails Rails includes an ORM called ActiveRecord
31. Intro to Rails Associations with other models
32. Intro to Rails Validations of its own state
33. Intro to Rails “Business logic”
34. Intro to Rails Controller
35. Intro to Rails Methods are called actions
36. Intro to Rails Methods use models to access the database
37. Intro to Rails Methods set instance variables
38. Intro to Rails Can explicitly render or redirect
39. Intro to Rails Can access the request parameters as a hash
40. Intro to Rails View
41. Intro to Rails Uses ERB, Rails default templating language
42. Intro to Rails Regular HTML
43. Intro to Rails Special tags to execute Ruby
44. Intro to Rails Access to the instance variables set in the controller
45. Intro to Rails How do they work together?
46. Intro to Rails http://my-rails-app.com <html lang=“eng”> <head> <meta charset=“utf-8”>… Response Request
47. Intro to Rails Model View Controller
48. Intro to Rails Model View Controller
49. Intro to Rails Model View Controller
50. Intro to Rails Model View Controller
51. Intro to Rails Model View Controller
52. Intro to Rails Model View Controller
53. Intro to Rails Model View Controller Router
54. Intro to Rails How do I get started?
55. Intro to Rails $ gem install rails
56. Intro to Rails $ gem install rails Just the name for Ruby libraries
57. Intro to Rails
58. Intro to Rails Rails is modular, made out of other 18 libraries
59. Intro to Rails $ rails new my_app
60. Intro to Rails $ rails new my_app The name of your Rails app
61. Intro to Rails
62. Intro to Rails Creates a bunch of files and then install the dependencies
63. Intro to Rails
64. Intro to Rails File with the list of libraries (gems) you want to use
65. Intro to Rails Where app configuration files are
66. Intro to Rails Where database schema and migrations are
67. Intro to Rails Where tests go
68. Intro to Rails Where your application code is $ cd app/
69. Intro to Rails
70. Intro to Rails Where CSS, JS and images go
71. Intro to Rails Where controllers go
72. Intro to Rails Helpers are “globally scoped” methods intended to be used mainly in views and controllers
73. Intro to Rails Classes that make sending email easy
74. Intro to Rails Where models go
75. Intro to Rails Where views go
76. Let’s see this in action! @sebasoga