Rails 3 provides several changes and improvements over previous versions. It utilizes Ruby 1.9.2 and Bundler for managing gem dependencies. The Rails environment and root paths have changed, as well as aspects of routing, validations, sessions and mailing. Additional plugins like Jpmobile and Devise help customize Rails for mobile applications. Overall, Rails 3 incorporates the Rack middleware framework and modularizes components for better extensibility and plugin support.

1. Rails 3
2011/04/12
Kosuke Matsuda

2. Introduction

3. • Rails 3
• Rails
• Rails 3
•

4. Enviroments

5. • Ruby 1.9.2 ( w/ RVM )
• Ruby on Rails 3.0.6
• bundler
• jpmobile 1.0.0.pre
• devise 1.1.8 ( 1.2.0? )
...

6. Rails 3

8. Rails

9. • RAILS_ENV → Rails.env
• Rails.env.development?
• RAILS_ROOT → Rails.root
• Rails.root.join(‘lib’, ‘customize.rb’)
• Rails.logger

10. Rails configuration

11. • Rails::Application.config
= {MyApp}::Application.config
• MyApp : Rails new my_app
•

12. Bundler

13. gem
bundle
--path
.bundle/config
bundle
OK

14. Timezone

15. • RDB (JST)
• http://d.hatena.ne.jp/yuum3/20110211/1297434952

16. deploy

17. with capistrano
OK

18. Routing

19. • controller
• action Symbol

20. Validations

21. • ActiveRecord ActiveModel
• Sexy Validation
• validation

22. Custom Validaions

24. validator_generator
• custom validator
• https://github.com/matsuda/validator_generator

26. • ToDo: Test
•5
• (ry
•

27. validations

28. sample

30. validation_step_fu
• validations
DRY
• https://github.com/matsuda/validations_step_fu

33. jpmobile

34. •
• Cookie query string
session_id
• session store cookie
DB(ActiveRecord )

35. Rack Session
• Rails 3(2.3?) Session Rack
• session stores are lazy loaded.
• reset_session
session_id
• http://togetter.com/li/54844

36. • session_id
• https://gist.github.com/782534

37. Devise

38. •
• c s
• devise ≠ device
•
• cookie

39. galapagos_mobile
• jpmobile (devise Rails
cookie
• https://github.com/matsuda/galapagos_mobile
•
•

40. ActionDispatch::ShowExceptions

41. • controller view
ActionDispatch::ShowExceptions rescue
•
•

43. • Ruby 1.9
• ex. jpmobile
•

44. ActionMailer

45. •
• helper

46. • Jpmobile::Mailer::Base
•
•
• Jpmobile

48. • exception_notification
• Rack
• ssl_requirement
• https://github.com/bartt/ssl_requirement
• kaminari
• Rails

49. • rails-sh
• https://github.com/jugyo/rails-sh
• Rails
• galakei
• https://github.com/mobalean/galakei
•

50. Conclusion

51. • Rails 3
• Rack
• Rails2
ActionPack Rack
• Rails 3 plugin
•

52. • Rails 3

53. any question?