On 15-Jul-08, at 4:08 PM, Kyle Sluder wrote:
On Tue, Jul 15, 2008 at 8:41 AM, Hamish Allan <[EMAIL PROTECTED]>
wrote:
If you were using Core Data, expressing your familial relations as
to-many relationships with inverses, it would be straightforward to
achieve the query you want (and indeed, to create a GUI for that
query).
In fact, as long as you have modeled relationships from parent to
child you can do it, Core Data or not. Get a reference to Balbo and
Ponto and then use a keypath involving @distinctUnionOfArrays to get
to it. A bit of set theory is helpful here.
The Key-Value Coding Programming Guide has more info on this,
including a sample data relationship and what the various operators
will return when used.
http://developer.apple.com/documentation/Cocoa/Conceptual/KeyValueCoding/Concepts/ArrayOperators.html#/
/apple_ref/doc/uid/20002176
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