Learning Rails

1. * * splash@dei.uc.pt 31 March 2011

2. Chapter 0

3. def what is rails? 'A web framework' end

4. Rails was created in 2003 by David Heinemeier Hansson

5. Who is already on Rails?

9. Let’s try it out!

12. Chapter 1

13. Basic concepts of Rails §  Support for §  Follows the pattern §  Follows the architectural pattern §  Supports

14. Rails directory structure

16. Rails directory structure Application code, structured following the MVC design

17. Rails directory structure Application configuration

21. Rails directory structure Files to manipulate the database

22. Rails directory structure Documentation for the app

23. Rails directory structure Static files accessible to the public

24. Rails directory structure Application tests

25. Rails directory structure Third-party Plugins

27. Bundler next step Use Bundler to include and install the gems needed

28. Bundler

29. Bundler

30. Chapter 2

31. Building a simple app Key id integer value string state string

32. Building a simple app

36. Building a simple app §  We now need to §  This with our new data model

37. Building a simple app §  Let’s delete the default static page

38. Building a simple app §  Run the server!

39. Building a simple app §  Root page

40. Building a simple app §  Index action

41. Building a simple app §  New action

42. Building a simple app §  Show action

43. Building a simple app §  Edit action

44. Building a simple app §  Destroy

45. Building a simple app table from “Ruby on Rails Tutorial: Learn Rails by Example” available at http://ruby.railstutorial.org/ §  Correspondence between pages and URLs

46. Building a simple app diagram from “Ruby on Rails Tutorial: Learn Rails by Example” available at http://ruby.railstutorial.org/ §  MVC in Rails

47. Building a simple app diagram from “Ruby on Rails Tutorial: Learn Rails by Example” available at http://ruby.railstutorial.org/ §  MVC in Rails The browser issues a request for the URL

48. Building a simple app diagram from “Ruby on Rails Tutorial: Learn Rails by Example” available at http://ruby.railstutorial.org/ §  MVC in Rails Rails routes to the index action in the

49. Building a simple app diagram from “Ruby on Rails Tutorial: Learn Rails by Example” available at http://ruby.railstutorial.org/ §  MVC in Rails the !

50. Building a simple app diagram from “Ruby on Rails Tutorial: Learn Rails by Example” available at http://ruby.railstutorial.org/ §  MVC in Rails

51. Building a simple app diagram from “Ruby on Rails Tutorial: Learn Rails by Example” available at http://ruby.railstutorial.org/ §  MVC in Rails The index action asks the Key model to retrieve all keys ( )

52. Building a simple app diagram from “Ruby on Rails Tutorial: Learn Rails by Example” available at http://ruby.railstutorial.org/ §  MVC in Rails The Key model pulls all the keys from the database

53. Building a simple app diagram from “Ruby on Rails Tutorial: Learn Rails by Example” available at http://ruby.railstutorial.org/ §  MVC in Rails The Key model returns the list of keys to the controller

54. Building a simple app diagram from “Ruby on Rails Tutorial: Learn Rails by Example” available at http://ruby.railstutorial.org/ §  MVC in Rails The controller captures the keys in the @keys variable, which is passed to the

55. Building a simple app diagram from “Ruby on Rails Tutorial: Learn Rails by Example” available at http://ruby.railstutorial.org/ §  MVC in Rails The controller captures the keys in the @users variable, which is passed to the

56. Building a simple app diagram from “Ruby on Rails Tutorial: Learn Rails by Example” available at http://ruby.railstutorial.org/ §  MVC in Rails The controller captures the keys in the @users variable, which is passed to the

57. Building a simple app diagram from “Ruby on Rails Tutorial: Learn Rails by Example” available at http://ruby.railstutorial.org/ §  MVC in Rails The view uses embedded Ruby to render the page as HTML

58. Building a simple app diagram from “Ruby on Rails Tutorial: Learn Rails by Example” available at http://ruby.railstutorial.org/ §  MVC in Rails The controller passes the HTML back to the browser

59. Building a simple app §  Where are deﬁned the routes?

60. Building a simple app §  Which are the default actions?

61. Building a simple app table from “Ruby on Rails Tutorial: Learn Rails by Example” available at http://ruby.railstutorial.org/ §  RESTful routes

62. image downloaded from http://wallpaperof.net/retro/

63. Chapter 4

64. Simple validations

65. Simple validations I shouldn’t be able to create a key without or

66. Simple validations V alue should be unique

74. Form helpers & builders

80. Form helpers & builders §  Let’s try a Form Builder DSL

81. Form helpers & builders §  Let’s try a Form Builder DSL - Features

82. Form helpers & builders §  Let’s try a Form Builder DSL - Features

83. Form helpers & builders §  Let’s try a Form Builder DSL - Installation

93. Form helpers & builders §  Let’s try it out!

96. Alternate markup languages

97. Alternate markup languages §  Why do views tend to become more and more complex?

98. Alternate markup languages HTML

112. Root path

113. Root path

114. Root path

115. Root path

116. Root path

117. Root path

118. Root path

119. image downloaded from http://wallpaperof.net/retro/

120. Chapter 5

121. Adding tournaments

122. Adding tournaments Tournament has many Key key_id integer name string start_date string end_date string

140. Adding value range to states

149. Internationalization & localization image downloaded from http://wallpaperof.net/retro/

150. Internationalization & localization

158. Route translation

173. Chapter 6

174. Web-app-theme

175. Web-app-theme

176. Web-app-theme

177. Web-app-theme

178. Web-app-theme

179. Web-app-theme

180. Chapter 7

181. Create a button on the keys’ index page to generate 100 random keys

182. Create a button on the keys’ index page to generate 100 random keys hints

187. The end

191. The end

192. Give back!

193. Give back! open source projects, feedback, share your knowledge, your snippets & projects

194. * * splash@dei.uc.pt 31 March 2011

Learning Rails

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