The document discusses Ruby on Rails, a web application framework written in Ruby. It provides several quotes from early adopters praising Rails for allowing web applications to be developed much faster compared to other frameworks while maintaining quality. The document also discusses challenges with traditional web development and how Rails aimed to address these challenges through its conventions and emphasis on productivity.

1. Ruby on Rails
Paolo Perrotta

2. Who we Are, What we Do.
Mithun Training & Consulting is a fully independent training and
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processes and techniques.
Mithun Training & Consulting B.V.
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T +31 (0)33-457 0840
F +31 (0)33-457 0839
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4. <Paolo Perrotta>

5. developer

6. author

7. teacher

9. Ruby on Rails

10. Rails

11. RoR

12. <what is Rails?>

13. Rails is a
framework for
building
database-backed
web applications
in Ruby.

14. Rails is a
framework for
building
database-backed
web applications
in Ruby.

15. Rails is a
framework for
building
database-backed
web applications
in Ruby.

16. Rails, anyone?

17. hot or not?

18. early 2005
first time I heard
about Ruby on Rails

19. <outrageous claims>

20. “[You] could develop a web application at least ten times
faster with Rails than you could with a typical Java
framework [...] without making any sacrifices in the quality
of your application.”
Curt Hibbs

21. “[You] could develop a web application at least ten times
faster with Rails than you could with a typical Java
framework [...] without making any sacrifices in the quality
of your application.”
Curt Hibbs
Cust Hibbs is a Senior
Soft ware Engineer at
Boeing. He was one of the
authors of WordStar for
Windows.

22. “Rails is the most well thought-out web development
framework I’ve ever used.”
James Duncan Davidson

23. “Rails is the most well thought-out web development
framework I’ve ever used.”
James Duncan Davidson
JDD is the author of
Tomcat and Ant.

24. “Powerful web applications that formerly might have taken
weeks or months to develop can be produced in a matter
of days [with Rails].”
Tim O'Reilly

25. “Powerful web applications that formerly might have taken
weeks or months to develop can be produced in a matter
of days [with Rails].”
Tim O'Reilly
Tim is “that” O’Reilly
- the editor.

26. “Rails has become a standard to which even well-
established tools are comparing themselves to.”
Martin Fowler

27. “Rails has become a standard to which even well-
established tools are comparing themselves to.”
Martin Fowler
Author of
“Refactoring”.

28. one more quote...

29. “Ruby on Rails is astounding. Using it is like
watching a kung-fu movie, where a dozen bad-ass
frameworks prepare to beat up the little newcomer
only to be handed their asses in a variety of
imaginative ways.”
Nathan Torkington

30. “Ruby on Rails is astounding. Using it is like
watching a kung-fu movie, where a dozen bad-ass
frameworks prepare to beat up the little newcomer
only to be handed their asses in a variety of
imaginative ways.”
Nathan Torkington
Chairman at OScon

31. Thanks to Joey deVilla for
this picture (http://
accordionguy.blogware.com/
Photos/2006/02/
bruce_on_rails.jpg)

32. <tonight>

33. presentation:
road to Rails

34. demo

35. break

36. talking
(Ruby?)
(ActiveRecord?)

37. talking
(Ruby?)
(ActiveRecord?)

38. talking
(Ruby?)
(ActiveRecord?)

39. presentation:
state of Rails

40. wrap-up

41. <road to Rails>

42. <web development>

43. why does it matter?

44. <challenges>

45. technical

46. people

47. <the medium>

48. unreliable

49. HTTP

50. stateless

51. no memory

52. no sessions

53. <the server>

54. integration

55. RDBs

56. Object-Oriented

57. mismatch

58. performance

59. many users

60. parallel programming

61. security

62. abuse

63. <the client>

64. the browser

65. thin client

66. stupid client

67. it sucks.

68. HTML

69. primitive GUI

70. constraining

71. flow

72. compatibility

73. many configurations

74. many browsers

75. many OSs

76. many devices

77. <the process>

78. quick

79. continuous feedback

80. moving target

81. <technologies>

82. static

83. just pages

84. forms

85. CGI

86. C

87. Perl

88. not secure

89. slow

90. web languages

91. ASP

92. PHP

93. template

94. HTML+code

95. <?
$db = quot;DATABASE NAMEquot;;
$admin = quot;MYSQL USER NAMEquot;;
$adpass = quot;MYSQL PASSWORDquot;;
$mysql_link = mysql_connect(quot;localhostquot;, $admin, $adpass);
mysql_select_db($db, $mysql_link);
?>
<HTML>
<BODY>
<script language=quot;phpquot;>
if($react == quot;delete_userquot;) {
if($user) {
$query = quot;DELETE from login WHERE user='$user' quot;;
$result = mysql_query($query, $mysql_link);
if(mysql_num_rows($result)) {
print(quot;<strong>$user</strong> successfully deleted<p>quot;);
}
} else {
print(quot;<strong>no users to delete yet.</strong><p>quot;);
}
}
</script>
<form method=quot;POSTquot; action=quot;admin.php3quot;><div
align=quot;centerquot;><center><p>Delete Users
<input type=quot;hiddenquot; name=quot;reactquot; value=quot;delete_userquot;>
<select name=quot;userquot; size=quot;1quot;>
<script language=quot;phpquot;>
$query = quot;SELECT user FROM login ORDER BY userquot;;
$result = mysql_query($query, $mysql_link);
...

96. <?
$db = quot;DATABASE NAMEquot;;
$admin = quot;MYSQL USER NAMEquot;;
$adpass = quot;MYSQL PASSWORDquot;;
$mysql_link = mysql_connect(quot;localhostquot;, $admin, $adpass);
mysql_select_db($db, $mysql_link);
?>
<HTML>
<BODY>
<script language=quot;phpquot;>
if($react == quot;delete_userquot;) {
if($user) {
$query = quot;DELETE from login WHERE user='$user' quot;;
$result = mysql_query($query, $mysql_link);
if(mysql_num_rows($result)) {
print(quot;<strong>$user</strong> successfully deleted<p>quot;);
}
} else {
print(quot;<strong>no users to delete yet.</strong><p>quot;);
}
}
</script>
<form method=quot;POSTquot; action=quot;admin.php3quot;><div
align=quot;centerquot;><center><p>Delete Users
<input type=quot;hiddenquot; name=quot;reactquot; value=quot;delete_userquot;>
<select name=quot;userquot; size=quot;1quot;>
<script language=quot;phpquot;>
$query = quot;SELECT user FROM login ORDER BY userquot;;
$result = mysql_query($query, $mysql_link);
...

97. <?
$db = quot;DATABASE NAMEquot;;
$admin = quot;MYSQL USER NAMEquot;;
$adpass = quot;MYSQL PASSWORDquot;;
$mysql_link = mysql_connect(quot;localhostquot;, $admin, $adpass);
mysql_select_db($db, $mysql_link);
?>
<HTML>
<BODY>
<script language=quot;phpquot;>
if($react == quot;delete_userquot;) {
if($user) {
$query = quot;DELETE from login WHERE user='$user' quot;;
$result = mysql_query($query, $mysql_link);
if(mysql_num_rows($result)) {
print(quot;<strong>$user</strong> successfully deleted<p>quot;);
}
} else {
print(quot;<strong>no users to delete yet.</strong><p>quot;);
}
}
</script>
<form method=quot;POSTquot; action=quot;admin.php3quot;><div
align=quot;centerquot;><center><p>Delete Users
<input type=quot;hiddenquot; name=quot;reactquot; value=quot;delete_userquot;>
<select name=quot;userquot; size=quot;1quot;>
<script language=quot;phpquot;>
$query = quot;SELECT user FROM login ORDER BY userquot;;
$result = mysql_query($query, $mysql_link);
...

98. <?
$db = quot;DATABASE NAMEquot;;
$admin = quot;MYSQL USER NAMEquot;;
$adpass = quot;MYSQL PASSWORDquot;;
$mysql_link = mysql_connect(quot;localhostquot;, $admin, $adpass);
mysql_select_db($db, $mysql_link);
?>
<HTML>
<BODY>
<script language=quot;phpquot;>
if($react == quot;delete_userquot;) {
if($user) {
$query = quot;DELETE from login WHERE user='$user' quot;;
$result = mysql_query($query, $mysql_link);
if(mysql_num_rows($result)) {
print(quot;<strong>$user</strong> successfully deleted<p>quot;);
}
} else {
print(quot;<strong>no users to delete yet.</strong><p>quot;);
}
}
</script>
<form method=quot;POSTquot; action=quot;admin.php3quot;><div
align=quot;centerquot;><center><p>Delete Users
<input type=quot;hiddenquot; name=quot;reactquot; value=quot;delete_userquot;>
<select name=quot;userquot; size=quot;1quot;>
<script language=quot;phpquot;>
$query = quot;SELECT user FROM login ORDER BY userquot;;
$result = mysql_query($query, $mysql_link);
...

99. tm
Big Ball of Mud

100. Java

101. J2EE

102. JSP

103. many frameworks

104. Struts

105. many layers

106. complex

107. bloated

108. XML configuration

109. <?xml version=quot;1.0quot;?>
<!DOCTYPE ejb-jar PUBLIC
'-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 1.1//EN'
'http://java.sun.com/j2ee/dtds/ejb-jar_1_1.dtd'>
<ejb-jar>
<enterprise-beans>
<!-- A minimal session EJB deployment -->
<session>
<ejb-name>PostingEJB</ejb-name>
<home>ejbs.PostingHome</home>
<remote>ejbs.Posting</remote>
<ejb-class>ejbs.PostingBean</ejb-class>
<!-- or Stateless -->
<session-type>Stateful</session-type>
<transaction-type>Container</transaction-type>
</session>
<!-- A minimal CMP entity EJB deployment -->
<entity>
<ejb-name>Bid</ejb-name>
<home>ejbe.BidHome</home>
<remote>ejbe.Bid</remote>
<ejb-class>ejbe.BidBean</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>ejbe.BidPK</prim-key-class>
<reentrant>False</reentrant>
<cmp-field><field-name>bid</field-name></cmp-field>
<cmp-field><field-name>bidder</field-name></cmp-field>
<cmp-field><field-name>bidDate</field-name></cmp-field>
<cmp-field><field-name>id</field-name></cmp-field>
</entity>
<!-- A minimal BMP entity EJB deployment -->
<entity>
<ejb-name>BidBMP</ejb-name>
...

110. the client side

111. Java applets

112. ActiveX

113. Flash

114. JavaScript

115. XMLHttpRequest

116. asynchronous

117. AJAX

118. better GUIs

119. difficult

120. <state of the art>

121. on the server

122. J2EE (or C#)

123. enterprisey

124. PHP

125. bigballofmuddy

126. on the client

127. AJAX

128. clumsy

129. not really great

130. anything better?

131. Rails

132. <the Rails Way>

133. I

134. KISS

135. Keep It Simple
(Stupid)

136. Keep It Simple
(Stupid)

137. II

138. DRY

139. Don’t Repeat Yourself

140. III

141. Convention
over
Configuration

142. Convention
over
Configuration

143. I - KISS
II - DRY
III - CoC

144. <demo>

145. <break>

146. <talk>