OSDC TW 2011 Rapid development with Rails

1. Rapid Development
with Rails

2. About me
• / xdite
• using Rails since 2007
• http://blog.xdite.net
• xdite@techbang.com.tw

3. Lead Developer & Manager

4. • Rails
• Rapid Development with Rails

5. Ruby on Rails
• Since 2004, DHH from 37 signals
•
• DRY / Agile / Rapid / Cooooool !!
•
• Developer / / /
....

6. • Developer
•
•
•

7. ...

8. ...

10. Developer
• PHP Developer
• PHP Developer
• Convention
• Developer
• Rails Developer

11. •
•
•
• Developer

12. •
• Rails 3 > Django > Rails 2 > Zend >
Symfony >>>>>> CakePHP
•
• 1M PV /day
•

13. •
• code
• Test
• Version Control )
•

14. Rapid Development?
•5 CRUD
• XXX
•

15. •
•
•
•
•

17. ..?

18. DELIVER

19. Rapid ?

21. FAIL!
•
•
•
•

22. development model

23. Rails

26. Rails
•
•

27. Rails
•
•

28. Rails
•
•
•
• => =>

29. •
•
•
• do better
• / solution

30. Rapid Development ?

31. Team Development

33. •
•
•
•

34. Team Development
•
• + = Team
• Opensource plugin + = Team

35. Convention / Practices

36. Rails
• Community-based best practices
• Continuous revolution
• contributed by top developers
• cutting-edge technologies & ideas running
on production
• Online training courses provided by Google

37. Rails
....

39. { }

40. Rails
• Community-based best practices
• Continuous revolution
• contributed by top developers
• cutting-edge technologies & ideas running
on production

41. !

43. Rails

44. Scaling Rails by Default
http://slidesha.re/dkJjOB
• Client-side Performance Tuning

45. • Client-side Performance Tuning
• CDN

46. image_tag
http://asset.example.org/photos/small.jpg?1269316198

47. • Client-side Performance Tuning
• CDN
• Minimal HTTP Request

48. <%= javascript_include_tag :default, :cache => true %>
<%=stylesheet_link_tag “main”, :cache => true %>
http://asset.example.org/javascripts/all.js?1269316198
http://asset.example.org/stylesheets/all.css?1269316198

49. • Client-side Performance Tuning
• CDN
• Minimal HTTP Request
• Parallel Download

50. config.action_controller.asset_host =
“asset%d.example.org”
http://asset1.example.org/javascripts/all.js?1269316198
http://asset2.example.org/javascripts/all.js?1269316198
http://asset3.example.org/javascripts/all.js?1269316198
http://asset4.example.org/javascripts/all.js?1269316198

51. • Client-side Performance Tuning
• CDN
• Minimal HTTP Request
• Parallel Download
• Cache Control

52. def index
do_somthing
expires_in 10.minutes
end
header[“Cache-Control”] = “max-age=600”

53. Scaling Rails by Default
http://slidesha.re/dkJjOB
• Client-side Performance Tunning
• CDN
• Minimal HTTP Request
• Parallel Download
• Cache Control
• ETags, Last Modified.....etc

54. • Common sense of DB tuning

55. • Common sense of DB tuning
• Avoid N+1 Query
using “bullet” plugin , :include => [:comment]

56. • Common sense of DB tuning
• Avoid N+1 Query
• Use Counter Cache
belongs_to :post, :counter_cache => “true”

57. • Common sense of DB tuning
• Avoid N+1 Query
• Use Counter Cache
• Use CONSTANT
CONSTANT will cache in memory

58. • Common sense of DB tuning
• Avoid N+1 Query
• Use Counter Cache
• Use CONSTANT
• ADD INDEX
EXPLAIN every query, avoid table scan
using “rails_index” plugin

59. • Common sense of DB tuning
• Avoid N+1 Query
• Use Counter Cache
• Use CONSTANT
• ADD INDEX
• SELECT ONLY NEED
using “scrooge” plugin replace SELECT *

60. • Version Control Everything

61. • Version Control Everything
• Git cheap branches bring cheap feature

62. • Version Control Everything
• Git
• db migration
version control db schema

63. • Version Control Everything
• Git
• db migration
• package management config
version control package dependency

64. Gemfile
Available since 2.3.x +

65. • Version Control Everything
• Git
• db migration
• package management config
• deployment
using Capistrano to rollback back each build easily

66. • Automate Everything

67. • Automate Everything
• template
authentication, permission control, facebook integration, pagination,admin panel,
seach engine,job worker,mailer....etc.
rails blog -m ~/template.rb
rails blog -m http://gist.github.com/31208.txt
rake rails:template LOCATION=~/template.rb

68. • Automate Everything
• template
• deployment
* memcached, search engine, mailer, job worker, db migrate....etc.
* 1 machine, 2+ machines, 10+ machines ....
* Capistrano auto deployment + Deploy VMs....

69. • Code Readability
• OOP / Design Pattern
• MVC
• Rails Best Practice http://bit.ly/fIX3NV
• Writing Efficiently Ruby Code http://bit.ly/e0PpPF
• Writing team own best practices http://bit.ly/fL6aGI

70. • Product Quality
• refactor architecture
• SEO tuning
• UI tuning
• Pageview tuning
• Business tuning

71. • Modern Architecture
• Arel
• Rack
• ActiveModel
• Bundler

72. • Modern Architecture
• Arel
Relational Algebra for Ruby
simplifies the generation complex of SQL queries
adapts to various RDBMS systems

73. Rack Rack middleware
http://bit.ly/aZiOIs
• Modern Architecture
• Rack

74. • Modern Architecture
• ActiveModel
Everybody loves ActiveRecord’s feature
ActionPack helpers
Module
Naming, Conversion, AttributeMethods, Callback, Dirty,
MassAssignment Security,Observing,Serialization,Translation

75. • Modern Architecture
• Bundler
1 project have 10-20+ gem / plugins
A require ‘Z’ v=0.2.1 B require ‘Z’ v=0.1.2 => conflict!
some plugin only have trunk version, especially when we are in Rails 3.0.0 pre

76. Gemfile
Available since 2.3.x +

77. • Modern Architecture
• Bundler
Dependency Resolution
Groups of Dependencies
support git , branch , tag
bundle lock

78. survey
• Compass Ruby CSS , CSS module http://bit.ly/i2XLyZ
• CoffeeScript Ruby JavaScript
• TDD / BDD
• plugin....

79. • Query Reviwer....etc

80. just follow Rails !!

81. •
•
•

82. Projects
• 2010/04 : T
• 2010/05 : event
• 2010/08 : Digiphoto event
• 2010/09 : event
• 2010/10 : event
• 2010/11 : T
• 2010/12 : Digiphoto event
• 2011/03 : R3

83. Rails Developer

85. ?
...

86. Rails ?
...

87. Rapid Development with fun and money
• Deliver
• http://bit.ly/eYfdba
• ( ) || ( / )
http://bit.ly/dPk7od
•
•

88. Thanks for listening

89. http://bit.ly/hDiq72
Burn Rate

90. http://bit.ly/2UivVg
( Agricola ) Startup / Website

91. http://blog.xdite.net

92. Q&A