[F-Script-talk] Subclassing NSManagedObject

[Tim M. <t_m...@me...>]

Happy New Year

I'm playing around with an implementation of f-script which will make  
use of a subclass of NSManagedObject.

I'm writing a core data program contains an "Items" entity linked via  
a one to many relationship to a "Characteristics" entity. The  
"Characteristics" entity has two attributes name and value. Each  
"Item" may contain a number of characteristics which I was planning  
on accessing by subclassing NSManagedObject so I can make use of the  
valueForUndefinedKey method to the correct value based upon if the  
message matched the name attribute, i.e.

	> Characteristics test

which would return something like:

	{100, 200}

Unfortunately, after setting everything up all I got was:

	> Characteristics test
	error: an instance of SDTManagedObject does not respond to "test"

After playing around with various bit and pieces I finally got it to  
work using

	> Characteristics valueForKey: 'test'
	{100, 200}

However I'd prefer to use the more concise commands (ie. ">  
Characteristics test"). I'm guessing that these don't work because F- 
script  first checks what keys an object support's before sending any  
message. Could you give me any pointer on what this may be as I think  
I'll have to customise this method as well?

Best Regards

Tim