I have two versionedSchema V1VersionedSchema, V2VersionedSchema. When i create schema with versionedSchema like code below and check version using breakpoint, V1, V2 Schema encodingVersion is same. let v3Schema = Schema(versionedSchema: V1VersionedSchema.self) // encodingVersion: 1.0.0 // schemaEncodingVersion: 1.0.0 let v2Schema = Schema(versionedSchema: V2VersionedSchema.self) // encodingVersion: 1.0.0 // schemaEncodingVersion: 2.0.0 Why encoding version is same? (I think migration plan v1 to v2 isn't work becaus of that)

In Xcode 15.0.1, I created a new project to start working with SwiftData. I did this by creating a default App project and checking the Use SwiftData checkbox. The resulting project contains just three files: an app entry point file, a ContentView SwiftUI view file, and an Item model file. The only change I made was to annotate the default Item timestamp property with a .transformable attribute. Here is the resulting model: @Model final class Item { @Attribute(.transformable(by: TestVT.self)) var timestamp: Date // Only updated this line init(timestamp: Date) { self.timestamp = timestamp } } And here is the definition of TestVT. It is a basic ValueTransformer that simply tries to store the Date as a NSNumber: // Added this class TestVT: ValueTransformer { static let name = NSValueTransformerName("TestVT") override class func transformedValueClass() -> AnyClass { NSNumber.self } override class func allowsReverseTransformation() -> Bool { true } override func transformedValue(_ value: Any?) -> Any? { guard let date = value as? Date else { return nil } let ti = date.timeIntervalSince1970 return NSNumber(value: ti) } override func reverseTransformedValue(_ value: Any?) -> Any? { guard let num = value as? NSNumber else { return nil } let ti = num.doubleValue as TimeInterval return Date(timeIntervalSince1970: ti) } } And finally, I made sure to register my ValueTransformer but updating the sharedModelContainer definition in the App: var sharedModelContainer: ModelContainer = { ValueTransformer.setValueTransformer(TestVT(), forName: TestVT.name) // Only added this line let schema = Schema([ Item.self, ]) let modelConfiguration = ModelConfiguration(schema: schema, isStoredInMemoryOnly: false) do { return try ModelContainer(for: schema, configurations: [modelConfiguration]) } catch { fatalError("Could not create ModelContainer: \(error)") } }() Prior to Xcode 15.1, this was working fine. However, now when I try to create an item when running the app I get the following error: Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Unacceptable type of value for attribute: property = "timestamp"; desired type = NSNumber; given type = __NSTaggedDate; value = 2023-12-14 01:47:11 +0000.' I'm unsure of why this stopped working. The error seems to be complaining about the input being of type Date when NSNumber was expected, but I thought that's what the ValueTransformer was supposed to be doing. Important note: prior to Xcode 15.1, I did not originally override the transformedValueClass() and everything was working but in the new Xcode when launching the app I was getting a Thread 1: EXC_BAD_ACCESS (code=1, address=0x0) on the return try ModelContainer(...) line. Removing the .transformable property from my model fixed the issue. That's why I added the override here, because I think the docs indicate overriding it as well and I missed that the first time. This being said, I think the code I have is what a correct ValueTransformer would look like. If anyone has experienced this issue, or has a working ValueTransformer for SwiftData in Xcode 15.1, please let me know. Appreciate any help with this issue. Thanks so much!

Hey, I might have a super dumb question but I am very new to SwiftData and Swift in general. So I have the following code in a View: @State private var selectedMonth: String = "" @State private var selectedYear: String = "" @Query( filter: #Predicate<Transaction> { transaction in transaction.date.monthString == selectedMonth && transaction.date.yearString == selectedYear }, sort: \Transaction.date ) var transactions: [Transaction] My @State vars selectedMonth and selectedYear get changed whenever the user selects options from a menu. I've had trouble getting this query/filter to work, does anyone know if filtering on dynamic (@State) variables is supported in SwiftData? If so, am I missing something here? I've also tried the pattern of having the transactions array live elsewhere in a regular swift file with the @Published macro and calling an update function whenever the @State vars selectedMonth or selectedYear get updated using .onChange(of:) . Unfortunately, I've not been able to find any documentation or examples about setting up a regular swift file (not SwiftUI) to work with SwiftData (e.g. querying from it, accessing the context/container, etc) Would appreciate anyone giving tips or pointing me in the right direction. Sorry if its a noob questions, thanks so much for any help

Xcode: 15.1 I've got (simplified) model with relationship many-to-many defined as follows @Model final class Item { var title: String @Relationship(inverse: \Tag.items) var tags: [Tag]? init(_ title: String) { self.title = title } } @Model final class Tag { var name: String var items: [Item]? init(_ name: String) { self.name = name } } and a view with a query struct ItemsView: View { @Query var items: [Item] var body: some View { List {...} } init(searchText: String) { _items = Query(filter: #Predicate<Item> { item in if (searchText.isEmpty) { return true } else { return item.tags!.contains{$0.name.localizedStandardContains(searchText)} } }) } } This code compiles but fails at runtime with an error: Query encountered an error: SwiftData.SwiftDataError(_error: SwiftData.SwiftDataError._Error.unsupportedPredicate) It looks like Predicate does not like optionals cause after changing tags and items to non optionals and the predicate line to item.tags.contains{$0.name.localizedStandardContains(searchText)} everything works perfectly fine. So, my question is, does anybody know how to make it work with optionals? Full code: https://github.com/m4rqs/PredicateWithOptionals.git

My app uses a significant amount of space in a private CloudKit database, and I need to be able to show users how much free space they have. Is there any way to get this value programmatically?

I am trying to use ArchiveStream.process on MacOS as outlined in the documentation here: https://developer.apple.com/documentation/accelerate/decompressing_and_extracting_an_archived_directory I have been able to successfully do the following: Take objects and create Data objects Create a UIDocument that is FileWrapper based Compress the UIDocument as an .aar archive Upload it to iCloud as a CKRecord Download it as an .aar and decode it back to a directory Decode the directory as individual data items and back to objects The problem is that I sometimes can only download from iCloud once and have the decompression function - other times it may work two or three times but ultimately fails when trying to call ArchiveStream.process The error reported by ArchiveStream.process is simply 'ioError' but on the console I see the following: [0xa5063c00] Truncated block header (8/16 bytes read) [0xa503d000] NOP received [0xa5080400] processStream [0xa7019000] decoder failed [0xbd008c00] istream read error [0xbd031c00] refill buffer [0x90008000] archive stream read error (header) [0xc8173800] stream cancelled The test data I am using does not change so it does not appear to be related to what I am compressing. But I am at a loss how to prevent the error. This is IOS 17 running on MacOS (as iPad) and on IOS 17 devices.

Expected behaviour: When I press the button I expect the label change from "Original" to "Edited" Obtained behaviour: This only happens in scenario A) and B) not C), the desired. Scenario A: action: update2(item:) and both labels Scenario B: action: update(itemID:container:) and label: Text(item.name) Scenario C: action: update(itemID:container:) and label: ItemRow(item:) import SwiftUI import SwiftData struct ContentView: View { @Environment(\.modelContext) private var modelContext @Query private var items: [Item] var body: some View { NavigationSplitView { List { ForEach(items) { item in Button(action: { update(itemID: item.id, container: modelContext.container) // update2(item: item) }, label: { ItemRow(item: item) // Text(item.name) }) } .onDelete(perform: deleteItems) } .toolbar { ToolbarItem(placement: .navigationBarTrailing) { EditButton() } ToolbarItem { Button(action: addItem) { Label("Add Item", systemImage: "plus") } } } } detail: { Text("Select an item") } } private func addItem() { withAnimation { let newItem = Item(name: "Original") modelContext.insert(newItem) //modelContext.save() } } private func deleteItems(offsets: IndexSet) { withAnimation { for index in offsets { modelContext.delete(items[index]) } } } } struct ItemRow: View { let item: Item var body: some View { Text(item.name) } } @Model final class Item { var name: String init(name: String) { self.name = name } } func update(itemID: PersistentIdentifier, container: ModelContainer){ let editModelContext = ModelContext(container) editModelContext.autosaveEnabled = false let editModel = editModelContext.model(for: itemID) as! Item editModel.name = "Edited" try! editModelContext.save() } func update2(item: Item){ item.name = "Edited" }

When I logged into my cloudkit console to inspect the database for some debugging work I couldn't access the private database. It keeps saying "failed to access iCloud data, please signi n again". No matter how many times I sign in again, whether with password or passwordless key it keeps saying the same thing. It says that message when I click on Public database, and private and shared databases are below it. I only noticed this a couple of days ago. It's done this in the past, but I eventually got back into the database but I don't know what changed to make it work.

I'll preface by saying I'm a new Swift developer, having a go at my first app. Just a simple memory tracker. I'm building it using SwiftData + iCloud Syncing. I had set up my model like this: @Model final class Memory { var content: String = "" var dateCreated: Date = Date.now var dateUpdated: Date = Date.now var tags: [Tag]? = [Tag]() @Attribute(.externalStorage) var images: [Data] = [Data]() init( content: String = "", dateCreated: Date = .now, dateUpdated: Date = .now, tags: [Tag] = [Tag](), images: [Data] = [Data]() ) { self.content = content self.dateCreated = dateCreated self.dateUpdated = dateUpdated self.tags = tags self.images = images } } But I discovered that led to a massive performance issue as soon as someone added a few images to a Memory. Maybe SwiftData isn't correctly putting an ARRAY of Data into external storage? My memory usage would just balloon with each photo added. All the examples I've seen just use a singular Data type for external storage, so not sure. Anyway, I played around with different options and figured out that a new MemoryPhoto struct was probably best, so I put the old model in a V1 schema and my NEW V2 model looks like this... enum DataSchemaV2: VersionedSchema { static var versionIdentifier = Schema.Version(2, 0, 0) static var models: [any PersistentModel.Type] { [Memory.self, Tag.self, MemoryPhoto.self] } @Model final class Memory { var content: String = "" var dateCreated: Date = Date.now var dateUpdated: Date = Date.now var tags: [Tag]? = [Tag]() @Relationship(deleteRule: .cascade) var photos: [MemoryPhoto]? = [MemoryPhoto]() @Attribute(.externalStorage) var images: [Data] = [Data]() init( content: String = "", dateCreated: Date = .now, dateUpdated: Date = .now, tags: [Tag] = [Tag](), images: [Data] = [Data](), photos: [MemoryPhoto] = [MemoryPhoto]() ) { self.content = content self.dateCreated = dateCreated self.dateUpdated = dateUpdated self.tags = tags self.images = images self.photos = photos } } @Model final class MemoryPhoto { @Attribute(.externalStorage) var originalData: Data? @Relationship(inverse: \Memory.photos) var memory: Memory? init(originalData: Data? = nil, memory: Memory? = nil) { self.originalData = originalData self.memory = memory } } Here's my migration, currently, which does work, because as best I can tell this is a lightweight migration... enum DataMigrationPlan: SchemaMigrationPlan { static var schemas: [any VersionedSchema.Type] { [DataSchemaV1.self, DataSchemaV2.self] } static var stages: [MigrationStage] { [migrateV1toV2] } static let migrateV1toV2 = MigrationStage.lightweight(fromVersion: DataSchemaV1.self, toVersion: DataSchemaV2.self) } But what I'm trying to figure out now is to migrate the former memory.images of type [Data] to the new memory.photos of type [MemoryPhoto], and been struggling. Any type of custom migration I do fails, sometimes inconsistently. I can try to get the exact errors if helpful but at this point not even a simple fetch to existing memories and updating their content as a part of the migration works. Is there a way to write a hypothetical V2 to V3 migration that just takes the images and puts them in the photos "slot"? For instance, what I do have working is this function that basically runs a "migration" or sorts when a given memory appears and it has the former images property. .... .onAppear { convertImagesToPhotos() } } private func convertImagesToPhotos() { guard !memory.images.isEmpty && memory.unwrappedPhotos.isEmpty else { return } let convertedPhotos = memory.images.map { imageData in MemoryPhoto(originalData: imageData) } memory.photos?.append(contentsOf: convertedPhotos) memory.images.removeAll() } Any help or pointers appreciated for this newbie swift developer. If helpful, here's the main App struct too... @main struct YesterdaysApp: App { @Environment(\.scenePhase) var scenePhase @AppStorage("writingRemindersEnabled") var writingRemindersEnabled: Bool = false let container: ModelContainer init() { do { container = try ModelContainer( for: Memory.self, migrationPlan: DataMigrationPlan.self ) } catch { fatalError("Failed to initialize model container.") } } var body: some Scene { WindowGroup { OuterMemoryListView() .yesterdaysPremium() } .modelContainer(container) } }

This session was supposed to be a code-along, but the starter code is missing

I have a flutter app I developed and some of the users cannot use our backup system which uses iCloud Key-Value storage. These users all have one thing in common. Full iCloud. If they turn off the app from iCloud from backup details page in iCloud settings then it works. But if their iCloud is 100% full and they can't even access the page then it does not work. Can someone tell me why this is happening? My app is made in flutter. It uses this package: https://pub.dev/packages/cloud_kit. Thanks.

I get the "Permission Failure" error ("Invalid bundle ID for container") below only when running my app from my iOS Target, and not my watchkit target. The watch app is able to sync/create/delete items, but my iOS target is unable to even read the data from the cloud. The cloudkit Container ID matches my iOS Target Bundle ID, which is the apps Bundle ID. Looking at the output of CKContainer, the container matches the iOS Bundle ID. I have tried reseting multiple times, creating different cloud containers, reseting the Signing and Capabilites online. It always results in the same issue... What am I missing here? <CKError 0x281b69590: "Partial Failure" (2/1011); "Failed to modify some record zones"; uuid = D57676F8-455E-4039-9DF4-824E3BAD42BE; container ID = "iCloud.companyName.AppName"; partial errors: { com.apple.coredata.cloudkit.zone:__defaultOwner__ = <CKError 0x281b771e0: "Permission Failure" (10/2007); server message = "Invalid bundle ID for container"; op = 8CCAD43B495AADC0; uuid = D57676F8-455E-4039-9DF4-824E3BAD42BE> }>

If one offline device increments a counter (starting at 0) value by 5 and a second offline device decrements the counter by 2, what can I do so that the final counter value is 3 (once the devices come back online)? I have read about operational transformations for conflict resolution. Is there any example code I can look at that implements it?

I'm trying to delete many records with one CKModifyRecordsOperation and getting this error: <CKError 0x600000dbe4f0: "Limit Exceeded" (27/1020); "Your request contains 552 items which is more than the maximum number of items in a single request (400)"> This obviously means, that Modify Operation has record limit of 400 which is equal to CKQueryOperation.maximumResults. The good solution here would be to chunk the array of records into subarrays with length less than 400 and add multiple delete operations to the database. The only problem is that the limit for CKModifyRecordsOperation is neither documented nor provided with a constant, so it's basically a magic number. In hope that my prayers would be heard I want to ask to add maximumResults constant to CKModifyRecordsOperation.

I'm getting SwiftData/SchemaProperty.swift:369: Fatal error: Unexpected type for CompositeAttribute CLLocationCoordinate2D in the following situation - this is simplified, but demonstrates the issue. There are a lot of posts discussing Measurements running into the same issue, and the recommended fix is to turn the Measurement (or CLLocationCoordinate2D in this example) into a computed property and generate it on the fly. I'm trying to cache instances of CLLocationCoordinate2D, rather than creating new ones every time a View renders, so those work arounds don't work around. The SwiftData docs seem to indicate that this should be possible. Can anyone recommend a fix? Thanks in advance. import SwiftData import MapKit @Model final class foo : Codable { var bar: SomeStruct init( bar: SomeStruct ) { self.bar = bar } enum CodingKeys : CodingKey { case bar } init(from decoder: Decoder) throws { let container = try decoder.container(keyedBy: CodingKeys.self) self.bar = try container.decode(SomeStruct.self, forKey: .bar) } func encode(to encoder: Encoder) throws { var container = encoder.container(keyedBy: CodingKeys.self) try container.encode(bar, forKey: .bar) } } struct SomeStruct : Codable { var latitude: Double var longitude: Double @Transient var clLocation: CLLocationCoordinate2D init(latitude: Double, longitude: Double) { self.latitude = latitude self.longitude = longitude self.clLocation = CLLocationCoordinate2D(latitude: latitude, longitude: longitude) } enum CodingKeys : CodingKey { case latitude, longitude } init(from decoder: Decoder) throws { let container = try decoder.container(keyedBy: CodingKeys.self) self.latitude = try container.decode(Double.self, forKey: .latitude) self.longitude = try container.decode(Double.self, forKey: .longitude) self.clLocation = CLLocationCoordinate2D(latitude: latitude, longitude: longitude) } func encode(to encoder: Encoder) throws { var container = encoder.container(keyedBy: CodingKeys.self) try container.encode(latitude, forKey: .latitude) try container.encode(longitude, forKey: .longitude) } }

NSMetadataQuery fail in iOS17.2 with Error Domain=com.apple.accounts Code=7 ACErrorPermissionDenied

This possibly seems like a regression but from iOS 17.1.0+, I'm having issues from Xcode 15.2 Beta &where when using a transformable property I'm getting a crash when trying to create a model container. This worked fine for me in Xcode 15.1 Beta when testing on iOS OS 17.0.1 and below. I have a simple model where I'm trying to save a UIColor, below is an example of this model. class Category: Codable { @Attribute(.unique) var title: String var items: [Item]? @Attribute(.transformable(by: ColorValueTransformer.self)) var color: UIColor? init(title: String = "", color: UIColor) { self.title = title self.color = color } enum CodingKeys: String, CodingKey { case title } required init(from decoder: Decoder) throws { ... } func encode(to encoder: Encoder) throws { ... } } Within my value transformer, I'm handling setting and getting the value. final class ColorValueTransformer: ValueTransformer { static let name = NSValueTransformerName(rawValue: String(describing: ColorValueTransformer.self)) override func transformedValue(_ value: Any?) -> Any? { guard let color = value as? UIColor else { return nil } do { let data = try NSKeyedArchiver.archivedData(withRootObject: color, requiringSecureCoding: true) return data } catch { return nil } } override func reverseTransformedValue(_ value: Any?) -> Any? { guard let data = value as? Data else { return nil } do { let color = try NSKeyedUnarchiver.unarchivedObject(ofClass: UIColor.self, from: data) return color } catch { return nil } } public static func register() { let transformer = ColorValueTransformer() ValueTransformer.setValueTransformer(transformer, forName: name) } } Then within my root app entry point, I register this transformer. @main struct ToDosApp: App { ...... init() { ColorValueTransformer.register() } ...... Unfortunately in my custom container object I get a crash on this line let container = try ModelContainer(for: ....) With an error of Thread 1: EXC_BAD_ACCESS (code=1, address=0x0) Like i said before previously this was working fine but now it's not... I have a feedback open also FB13471979 but it would be great if someone on the SwiftData team at Apple could look into this issue since it's a pretty big regression...

Anyone successfully able to add two or more ModelConfigurations to a ModelContainer? DESCRIPTION OF PROBLEM: When you create two ModelConfigurations for two different models and combine them into one ModelContainer, it seems the @Query fails to find the models. Crashes app with error: “Thread 1: "NSFetchRequest could not locate an NSEntityDescription for entity name 'NumberModel'" STEPS TO REPRODUCE 1 - Create a new iOS project. 2 - In ContentView.swift add this code: import SwiftData import SwiftUI struct ContentView: View { @Query private var colors: [ColorModel] @Query private var numbers: [NumberModel] var body: some View { List { ForEach(colors) { color in Text(color.name) } ForEach(numbers) { number in Text(number.name) } } } } #Preview { ContentView() .modelContainer(for: [ColorModel.self, NumberModel.self]) } 3 - In App file, add this code: import SwiftData import SwiftUI @Model class ColorModel { var name: String = "" init(name: String) { self.name = name } } @Model class NumberModel { var name: String = "" init(name: String) { self.name = name } } @main struct MultipleModelConfigsApp: App { private var container: ModelContainer init() { do { let config1 = ModelConfiguration(for: ColorModel.self) let config2 = ModelConfiguration(for: NumberModel.self) let container = try ModelContainer( for: ColorModel.self, NumberModel.self, configurations: config1, config2 ) self.container = container } catch { fatalError("ModelContainer creation failed.") } } var body: some Scene { WindowGroup { ContentView() .modelContainer(container) } } } 4 - Now run the app and observe the crash and the error stated above. VERSION OF XCODE Version 15.1 (15C65) FEEDBACK REPORT FB: FB13504577 (Xcode project attached to FB)

I am currently following the tutorial from Hacking with swift url: (https://www.hackingwithswift.com/books/ios-swiftui/introduction-to-swiftdata-and-swiftui) to integrate SwiftData into a SwiftUI project. The code generated based on the tutorial is provided below. However, an error occurs upon launching the app: SwiftData/ModelContainer.swift:144: Fatal error: failed to find a currently active container for Student. I am seeking assistance in resolving this issue. import SwiftUI import SwiftData @Model class Student { var id: UUID var name: String init(id: UUID, name: String) { self.id = id self.name = name } } @main struct project8App: App { var body: some Scene { WindowGroup { VStack { ContentView() } } .modelContainer(for: Student.self) } } struct ContentView: View { @Environment(\.modelContext) var modelContext @Query var students: [Student] let allStudents = [ Student(id: UUID(), name: "John"), Student(id: UUID(), name: "Paul"), Student(id: UUID(), name: "George"), Student(id: UUID(), name: "Ringo"), ] var body: some View { VStack { ForEach(students) { student in Text("\(student.name)") } Button(action: { // random student let student = allStudents.randomElement()! modelContext.insert(student) }) { Text("Add/Change name") } } } } P.S. It appears that the problem may be related to the container not being initialized by .modelContainer(for: Student.self). I have managed to resolve the error with the modified version below. However, I am still curious about the reasons behind the original version's malfunction and the differences between the two implementations. // version 2, which is ok to run @main struct project8App: App { let modelContainer: ModelContainer init() { do { modelContainer = try ModelContainer(for: Student.self) } catch { fatalError("Could not initialize ModelContainer") } } var body: some Scene { WindowGroup { VStack { ContentView() } } .modelContainer(modelContainer) } }

Afternoon all, I am starting out and want to store data in the App, some will be user specific and some general. So I have a new developer account which should have CloudKit permissions. I am just trying to make any of the most basic example applications work, but keep hitting issues. I create an App, select CloudKit and SwiftData. When I go into the signing and capabilities I select the Team which has the developer account. Then the CloudKit is selected as I clicked it when creating the project, but no Container is selected. I create a Container using the +, it names it iCloud.com.mydomain.AppName. However it is coloured in Red text. I press the refresh and then it turns into black text, the Push Notifications appear all populated for 1 second then all disappear. I have nothing under Push now, only a Trashcan button. The Container is now selected however. Is this an issue that the Push notifications items appeared then vanished? When I then try to run the app, using any of the many attempts I have had with simple code samples, it always fails to create the Container, usually with an error like this: error: Store failed to load. <NSPersistentStoreDescription: 0x600000c79ce0> (type: SQLite, url: file:///Users/cal/Library/Developer/CoreSimulator/Devices/6D2BA1B3-C7CA-499D-A280-AFF4C5E98180/data/Containers/Data/Application/B9CD5E35-08BD-44CC-A72D-EB170E3691C6/Library/Application%20Support/default.store) with error = Error Domain=NSCocoaErrorDomain Code=134060 "A Core Data error occurred." UserInfo={NSLocalizedFailureReason=CloudKit integration requires that all attributes be optional, or have a default value set. The following attributes are marked non-optional but do not have a default value: Item: name} with userInfo { NSLocalizedFailureReason = "CloudKit integration requires that all attributes be optional, or have a default value set. The following attributes are marked non-optional but do not have a default value:\nItem: name"; If I go into the CloudKit database view on Apple, I see the Container listed, albeit it is marked as not deployed to production. To try to remove my newbie issues I have used many web examples, the most recent of which was the "A Beginner’s Guide to SwiftData with a to-do app" from medium.com, which should just work really, snipped from Item.swift below but I have tried several other simple examples which all give the same issue: import Foundation import SwiftData @Model class Item: Identifiable { var name: String init(name: String){ self.name = name } } Any ideas really appreciated. Thank you