NSPersistentCloudKitContainer

So I believe I am overthinking it!lazy var persistentContainer: NSPersistentCloudKitContainer = { let container = NSPersistentCloudKitContainer(name: Model) let storeLocation = URL(fileURLWithPath: /path/to/cloud.store) let storeDescription = NSPersistentStoreDescription(url: storeLocation) //Set the container options cloudStoreDescription.cloudKitContainerOptions = NSPersistentCloudKitContainerOptions(containerIdentifier: com.myCompany.myApp2) // TODO: Migrate Core Data Store to new Model Version container.loadPersitentStores... ... }()This should be enough to handle the migration from Container 1 to 2, since the data is already stored in Core Data. Then instead of hooking up a persistent container to the old CloudKit container (which would probably throw errors due to mismatched Schema), we can use CloudKit to fetch and confirm all data has already transfered properly, fix missing data, and delete the recrods in Container 1.I decided not to Migrate Containers for this, instead Im using ver

Oh cool, I guess cmd+s is post....2) I'm curious if there's a means to allow the user to choose the version of the data in CloudKit or the version of the data on Device. My data sort of adds up to an expected whole. If one record is added or deleted, then the sum of the records will be incorrect. To give the user a good experience, I'd like to give them the ability to pick a snapshot of two different versions of their entire data set.Can `NSPersistentCloudKitContainer` facilitate this in anyway?3) Is there a best practices guide or design pattern recommendations with recards to UX anywhere?

I'm experiencing the same or similar problem.I suspect, but I am not certain, that it is a bug and I'll try to explain my reasons why... but first...My scenario:Xcode 11.3 project developing for iOS 13.x and beginning to implement NSPersistentCloudKitContainer.I have `Transformable` type attributes for two Entities in my data model (for some time now). Incidentally both these attributes are used to store an optional value for Measurement<UnitMass>, which I understand from my reseach, conforms to `Encodable` and is therefore able to just work with a Core Data attribute of type `Transformable`. Others have written more on the capabilities of the Foundation `Measurement` class, using more accurate language than me, in this and other forums, so I'll leave this part of my description short.As I am still in development with my Xcode project, I regularly switch between NSPersistentContainer and NSPersistentCloudKitContainer for testing purposes. This requires regularly resetting the development enviro

HiI try to use the NSBatchInsertRequest. but the insertResult is nil, and my CoreData is emptyI use the viewContext of the NSPersistentCloudKitContainer.let container = NSPersistentCloudKitContainer(name: CoreDataPerformance) container.loadPersistentStores(completionHandler: { (storeDescription, error) in if let error = error as NSError? { fatalError(Unresolved error (error), (error.userInfo)) } }) try container.viewContext.setQueryGenerationFrom(.current) let moc = container.viewContext moc.automaticallyMergesChangesFromParent = true moc.perform { let insertRequest = NSBatchInsertRequest(entity: Client.entity(), objects: clients) let insertResult = try? moc.execute(insertRequest) as? NSBatchInsertRequest if let success = insertResult as? Bool { print(RESULT: (success)) } }This is the error I receive in the console.2020-02-04 18:30:25.800705+0200 CoreDataPerformance[62836:778869] [error] warning: Multiple NSEntityDescriptions claim the NSManagedObject subclass 'CoreDataPerformance.Client' so +entity

I am having the same problem with my SwiftUI app that uses NSPersistentCloudKitContainer only when running on the Mac.

Have you set automaticallyMergesChangesFromParent = trueI choose to do this after I load my persistent container... lazy var persistentContainer: NSPersistentContainer = { let container = NSPersistentCloudKitContainer(name: persistentStoreName) container.viewContext.automaticallyMergesChangesFromParent = true container.loadPersistentStores(completionHandler: { (storeDescription, error) in if let error = error as NSError? { fatalError(Unresolved error (error), (error.userInfo)) } container.viewContext.automaticallyMergesChangesFromParent = true return container }()

Nick, thanks for the input.Behaviours I've noticed...Scenario 1Existing Core Data app with existing records.Log in to the same Apple ID on different Simulators or Devices.Enable NSPersistentCloudKitContainer and include container.viewContext.automaticallyMergesChangesFromParent = trueOnly new records are synced to users CloudKit account and therefore across devices using the same Apple ID. Existing records remain only on the device on which they are created.Scenario 2Existing Core Data app with existing records.Log in to the same Apple ID on different Simulators or Devices.Enable NSPersistentCloudKitContainer and include container.viewContext.automaticallyMergesChangesFromParent = trueEnable NSPersistentHistoryTrackingKey... guard let containerStoreDescription = container.persistentStoreDescriptions.first else { fatalError((#function): Failed to retrieve a persistent store description.) } containerStoreDescription.setOption(true as NSNumber, forKey: NSPersistentHistoryTrackingKey)ANY records

I spoke to an Apple Engineer about this and they suggested the best way was to make your container return either an NSPersistentContainer or NSPersistentCloudKitContainer depending on whether you users have selected iCloud syncing internally in your app - you can use a UserDefaults bool to store this.This works because NSPersistentCloudKitContainer is a subclass of NSPersistentContainer.You will also need to set the NSPersistentHistoryTrackingKey to true on the vanillla container so changes are recorded should they switch iCloud back on. There doesn't appear to be any need to set any options manually on NSPersistentCloudKitContainer as they're enabled by default.I have a PersistenceService class which manages my MOC and in it, this is how I set up the container: static var iCloudSyncData = UserDefaults.standard.bool(forKey: iCloudSyncData) static var persistentContainer: NSPersistentContainer = { let container: NSPersistentContainer? if iCloudSyncData { container = NSPersistentCloudKitContainer