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遇見 Ruby on Rails
- 1. Ruby on Rails ihower@gmail.com Ruby Taiwan 2010/5@
- 2. Agenda • Who am I • My story about web development • Introduction to Rails • Rails on Rails live demo • Why Ruby?
- 3. Who am I? • (a.k.a. ihower) • • & ( ) • Ruby on Rails (since 2006)
- 9. Where am I?
- 10. Software Desktop Mobile Web
- 11. Web application Ruby Java/.NET PHP Python Perl
- 12. My story about web development
- 13. 1990 Tim Berners-Lee World Wide Web
- 14. 1999 • • M$ FrontPage ( !) • CGI
- 15. 2003 • Perl CGI •
- 16. CGI, Perl HTML #!/usr/bin/perl open(FILE, "count.txt"); $num = <FILE>; $num++; close (FILE); open(WRITETO, ">count.txt"); print WRITETO "$num"; close (WRITETO); print <<PRINTAREA; content-type:text/htmlnn <style> <!-- body {background-color: black; line-height:1; margin-top: 0cm; margin-left: 0cm; margin-right: 0cm} --></style> <body><center> <b><font size=1 color=white> $num</font></b> PRINTAREA
- 17. 2002~2004 • Dreamweaver • PHP4 & MySQL
- 18. PHP HTML <?php $counter = intval(file_get_contents("counter.dat")) + 1; $fp = fopen("counter.dat", "w"); fwrite($fp, $counter); fclose($fp); ?> <p>Visitors: <?php echo @counter %></p>
- 19. PHP & MySQL <?php $db = mysql_connect("localhost", "root", "password"); mysql_query("SET NAMES 'utf8'"); mysql_select_db($SERVER['db']); ?> <html> <? $sql="select * from news where Class='1' or Class='3' order by CTDate desc limit 0,5"; $result= mysql_query($sql); while ( $arr=mysql_fetch_array($result) ) { echo <<<NEWSEND <div class="box"> <span class="box-title-1"> <b> $arr[Title] </b> $arr[CTDate] </span> <div class="box-content"> $arr[Text] </div> </div> NEWSEND; } ?> </html>
- 20. 2003 ( )
- 21. PHP sucks!
- 22. 2005 • PHP web framework •
- 23. Web framework? • MVC • ORM • URL Template Session Ajax ......
- 24. MVC • Model Controller View • Model • • View • Ruby HTML • Controller Model • (e.g. ) Request Model View (e.g. HTML)
- 25. 1. Controller 2. 3. 4. View Model DB
- 26. MVC? • • (DRY: Don’t repeat yourself) •
- 27. ORM • Object-relational mapping • @posts = Post.find(:all, :order => "id desc", :limit => 5 ) @posts.each do |post| ... end
- 28. ORM? • SQL • ORM routine SQL • • SQL
- 29. 2006 • Ruby on Rails •
- 30. Rails? • ( MIT ) Web database-backed • MVC (Model-View-Control ) • ( ) Ruby Ajax ORM (object-relational-mapping) • 2004 David Heinemeier Hanson(DHH) 37signals
- 31. • Ruby • Don’t Repeat Yourself (DRY) • • Convention Over Configuration • • •
- 32. Ruby on Rails ? • ( ) • ( Joomla Durpal CMS •
- 33. Rails • 2005 DHH Hacker • 2006 Rails Jolt • 2005~2006 Ruby/Rails 1552% • Ruby Tiobe 26 11
- 34. Rails ? Java(Spring/Hibernate) Rails 4 20 4 ( 5 ) 3293 1164 1161 113 / 62/549 55/126 Justin Gehtland Java Rails
- 35. Rails ? • Justin Gehtland Java :Rails = 3.5 : 1 • Proc.net PHP : Rails = 10 : 1 • JavaEye JAVA : Rails = 10 : 1 • thegiive( Rails ) PHP : Rails = 8 : 1
- 36. Rails clone
- 37. Rails ? M V C MVC Model-View-Control
- 38. Rails live demo Creating a weblog in 15 minutes
- 40. Why Ruby?
- 41. Ruby? • (interpreted) • • • a.k.a. Matz • Lisp, Perl, Smalltalk • Happy
- 42. a trivial Ruby example str = "May Ruby be with you!" 5.times { puts str }
- 43. the example tells us: • (typing) • • (code block)
- 44. code lines matters 1. more code more bugs 2. more code needs IDE 3. more code needs more time to read
- 45. Fred Brooks’ law “programmer generate about same amount of code per day regardless of the language”
- 46. • Web framework like Rails has • MVC • ORM • Ruby is • interpreted scripting language • dynamic typing language • object oriented programming
- 47. Rails Ruby http://ihower.tw/training
- 49. If I were a college student...
- 50. 1. Learn more programming language Scripting Language: Ruby, Python, JavaScript Functional Language: Erlang, Scala, Haskell, Clojure
- 51. 2. Master Unix command Line
- 54. 3. Use Mac or Ubuntu Windows Unix-like
- 57. 4. Learn Git or Hg :
- 59. Live demo ( )
- 60. 5. Learn OOP
- 62. 6. Be Agile ?
- 65. 7. Learn SQL
- 67. 8. Learn HTTP
- 70. • Ruby Tuesday meeting ( ) • RubyConf Taiwan (2010/4/25) • OSDC.TW (2010/4/24) • COSCUP (2010/8/14) • RubyKaigi (2010/8/27 )