does anyone have a working example of a fetched-property in core-data?

Question

I have tried to use fetched properties a couple of times, and although it seems to be the right approach, it never works.

In my latest attempt I added the fetch

Answer 1

Adding to @Peter's answer. Here's how I got it working in Swift 2.0 and Xcode 7:

import Foundation
import CoreData

@objc(Card)
class Card: NSManagedObject {

    @NSManaged var statsOfTypeOne: [Stat]

}

And then, to read the fetched property:

managedObjectContext.refreshObject(someCard, mergeChanges: true)
// This works and returns [Stat] type
someCard.statsOfTypeOne
// So does this
someCard.valueForkey("statsOfTypeOne") as! [Stat]