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SwiftData iCloud sync breaks after disabling and re-enabling iCloud
A fairly simple ModelContainer: var sharedModelContainer: ModelContainer = { let schema = Schema([ Model1.self, Model2.self, Model3.self ]) let modelConfiguration = ModelConfiguration(schema: schema, isStoredInMemoryOnly: false, cloudKitDatabase: .automatic) do { let container = try ModelContainer(for: schema, migrationPlan: MigrationPlan.self, configurations: [modelConfiguration]) return container } catch { fatalError("Error: Could not create ModelContainer: \(error)") } }() After upgrading to macOS 15 and disabling/enabling iCloud for the app the sync stopped working on Mac. The steps: Go to System Settings > Apple Account > iCloud > Saved to iCloud > See all find the App and disable iCloud. After this synced items are removed from the app and some errors thrown in the console ('..unable to initialize without an iCloud account...') Re-enable the iCloud setting This error appears in the console: CoreData: error: CoreData+CloudKit: -[NSCloudKitMirroringDelegate resetAfterError:andKeepContainer:](612): <NSCloudKitMirroringDelegate: 0x6000020dc1e0> - resetting internal state after error: Error Domain=NSCocoaErrorDomain Code=134415 "(null)" On macOS Sonoma the items are synced back to the app and the sync is restored, but on Sequoia they don't come back and the sync is not working. I tried resetting the container, deleting all data - no help. Submitted FB15455847
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Oct ’24
SwiftData error when trying to save array in Model
In my SwiftData @Model I have an attribute attachments: [String]? and I'm getting an error when trying to save it: CoreData: fault: Could not materialize Objective-C class named "Array" from declared attribute value type "Array<String>" of attribute named attachments. Getting this error periodically on iOS 18 Beta 7 on iPhone, but the same code works on iPadOS 18 b7 and on macOS Sonoma (14.6.1) Anyone seen this?
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Aug ’24