App data update issue thru Core data sync to CloudKit

Question

I have setup push notifications and updates in CK are updating UI well. The issue I have is Syncing between Core Data and CK.

It's set to use NSPersistentCloudKitContainer with NSMergeByPropertyObjectTrumpMergePolicy option.

Its a very simple CD managed object for Player including lastUpdated field - I have private dB with equivalent CD_Player record type and fields paired with the Core Data entities.

- (void)savePlayerToCoreData:(Player *)player {
    NSLog(@"🎯 savePlayerToCoreData");
    
    NSManagedObjectContext *context = self.persistentContainer.viewContext;
    
    [context performBlock:^{
        // 🔍 Fetch the existing player using playerId
        NSFetchRequest *fetchRequest = [Player fetchRequest];
        fetchRequest.predicate = [NSPredicate predicateWithFormat:@"playerId == %@", player.playerId];
        fetchRequest.fetchLimit = 1;
        
        NSError *fetchError = nil;
        NSArray *results = [context executeFetchRequest:fetchRequest error:&fetchError];

        Player *managedPlayer = results.firstObject;

        if (managedPlayer) {
            NSLog(@"🔍 Fetched Player: %@ (playerId: %@, objectID: %@)",
                  managedPlayer.nickName,
                  managedPlayer.playerId,
                  managedPlayer.objectID);
        } else if (!managedPlayer) {
            NSLog(@"❌ Player not found in Core Data. Aborting update to prevent duplicate CloudKit records.");
            return;
        }

        // ✅ Update existing player
        managedPlayer.nickName = player.nickName;
        managedPlayer.avatarHexRgbColor = player.avatarHexRgbColor;
        managedPlayer.gamesWon = player.gamesWon;
        managedPlayer.gamesLost = player.gamesLost;
        managedPlayer.matchesWon = player.matchesWon;
        managedPlayer.matchesLost = player.matchesLost;
        managedPlayer.organizationKey = player.organizationKey;
        managedPlayer.strengths = player.strengths;
        managedPlayer.weaknesses = player.weaknesses;
        managedPlayer.lastUpdated = [NSDate date]; 

        if (player.avatar) {
            managedPlayer.avatar = player.avatar;
        }

        if (![managedPlayer hasChanges]) {
            NSLog(@"⚠️ No changes detected in Core Data. CloudKit sync may not trigger.");
        } else {
            NSLog(@"✅ Changes detected. Saving to trigger sync...");
        }

        NSError *saveError = nil;
        if ([context save:&saveError]) {
            NSLog(@"✅ Core Data context saved. CloudKit Sync should trigger.");
        } 
        NSLog(@"🔍 After Update: %@ (playerId: %@, objectID: %@)", managedPlayer.nickName, managedPlayer.playerId, managedPlayer.objectID);
    }];
}

When the user makes an update on the device, Core Data saves the context and looking at the logs within CK, I see a RecordSave event. My activity in on the device is coming through. All appears fine including the RecordId assignment on the basic logging I have added within my code..

The only issue is - simple test of updating single value for the nickName field is just not updating - it is not reflected in the CK portal view at all.

What could be the reason?

drewglew · Accepted Answer · 2025-03-31 05:24:13Z

0

I managed to resolve this by changing the nsmanagedobject parameter to a standard nsobject.

There must have been an issue with the context I was using.

answered Mar 31 at 5:24

drewglew

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