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Changes for page WebObjects and Squeryl

Last modified by Ravi Mendis on 2011/04/01 11:14
From version 61.1
edited by Ravi Mendis
on 2011/02/27 23:20
Change comment: There is no comment for this version
To version 64.1
edited by Ravi Mendis
on 2011/03/25 04:58
Change comment: There is no comment for this version

Summary

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Content
... ... @@ -8,7 +8,7 @@
8 8  * Scala Actor compatible
9 9  ** Immutable object model/graph
10 10  ** Explicit transaction control
11 -* Strongly-typed
11 +* Type Safety
12 12  ** Better suited for database/business "logic".
13 13   E.g: Exploits the compiler and IDE to catch exceptions at compile time rather than at run-time.
14 14  * Uses Scala collection classes
... ... @@ -45,3 +45,15 @@
45 45  * Optional attributes (i.e those that ##allowsNull##) are typed as ##OptionT##
46 46  * To one relationships that are not mandatory (i.e optional relationships) are also typed as ##OptionT##
47 47  * To many relationships are represented as a Squeryl iterable (collection class) as opposed to a ##NSArray##.
48 +
49 +=== Use of Scala Collections ===
50 +
51 +===== 1. Filtering =====
52 +
53 +Instead of using EOQualifiers to filter EOs dynamically, you can apply the type safe filter in Scala:
54 +
55 +{{code}}
56 +
57 +def activeFiles = files.filter(_.active == 1)
58 +
59 +{{/code}}