Re: [Rubycocoa-talk] Documentation for RubyCocoa on Leopard (with followup KVC/CoreData question).

[Ian J. <ian...@sp...>]

Hi Rich,

This seems hot off the press:

http://developer.apple.com/documentation/Cocoa/Conceptual/RubyPythonCocoa/Introduction/Introduction.html

Ian

On 14/12/2007, at 7:50 PM, Rich Warren wrote:

> I'm fairly familiar with both Ruby and Cocoa, but I've never really
> played around with RubyCocoa before. I read the "Ruby and Python on
> Mac OS X" article from the Apple Developer Connection, and I'm looking
> for more in-depth documentation.
>
> I'm using the version of RubyCocoa that comes with Leopard. It seems
> that the documentation is...missing?
>
> I found the example code at /Developer/Examples/Ruby/RubyCocoa, but
> the documentation at /Developer/Documentation/RubyCocoa has only three
> smallish HTML files in Japanese.
>
> ri doesn't seem to work for any OSX::* items.
>
> How do I find/load the documentation into Leopard?
>
> Are there any other good sources of RubyCocoa documentation?
>
> In particular, I'm looking for some information on CoreData and Key
> Value compliance.
>
> In short, I have a parent entity that has a to many relationship with
> a child entity. I currently display all the parents in a table. I
> would like to have one column bind to the child count for each parent.
>
> In Cocoa, I would do this by giving the parent a transient "count"
> attribute. I would then make a subclass of NSManagedObject and have
> the parent use my subclass. In my subclass, I would create a -
> (int_32t)count method that returned the child count. This would get
> called, through the magic of KVC for my parent's count value.
>
> In RubyCocoa I tried the same. But it didn't work. My sample code is
> below.
>
> require 'osx/cocoa'
>
> class ManagedParent < OSX::NSManagedObject
>
> 	def count()
> 		puts "Getting The Count"
> 		return 5
> 	end
> end
>
> Yes, yes. I know. I'm not actually getting the child count. But I
> wanted to get this, simpler version working before I tried to tackle
> the whole valueForKey_("child") mess.
>
> When I run my code, I'm not getting 5 for the count, nor am I seeing
> "Getting The Count" in the console. How do I get this to work?
>
> Thanks,
>
> -Rich-
>
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