macOS Core Data and Key-Value Coding

[gormster]

Hi guys

I've got a bit of a weird problem. I've got a one-to-one relationship between two entities in my Core Data model, called Trigger and View. (Before you jump on that, I've already tried renaming it, it's not a reserved word issue.)

Here's the extremely odd thing - I can't seem to traverse this relationship through KVC. Here's some code

//this works
NSManagedObject* view = [trigger valueForKey:@"view"];
int locx = [[view valueForKey:@"locX"] intValue];

//this doesn't
int locx = [[trigger valueForKey:@"view.locX"] intValue];

WTF. Both objects were instantiated with the insertNewObjectForEntityForName:inManagedObjectContext: method of NSEntityDescription, and the view was assigned to the trigger by was of setValue:forKey:. The error I get is 'the entity Loop is not key value coding-compliant for the key "view.locX".'

 

[JoshDC]

Try valueForKeyPath: instead.

 

[gormster]

Try valueForKeyPath: instead.

Hello, world. My name is gormster. I am an idiot who was using the wrong method name.




Thanks, JoshDC.