Good morning everyone! Today I have a question about using SwiftData with CloudKit and Widgets. I recently set up my project for SwiftData and CloudKit synchronization, but for some reason, I’m not able to give my Widget access to this data. CloudKit works perfectly fine for my main app, but the Widget only shows placeholder data(the placeholder data which were defined in the get functions as catch, this is sure). I have set the CloudKit capability for my Widget extension and tried fetching data with the get-functions in the code below. I also ensured that the data model files are members of the Widget extension target and that the Widget extension uses the same CloudKit container as the main app. I wondered if it is possible and reasonable to save a copy of my CloudKit data in an App Group container, but in that case, the information shown in the Widget are not always up-to-date, so a solution that fetches data directly from CloudKit would be better. Has anyone had experience with this case? I couldn’t find much information about this problem online. In the code below, many parts have been deleted or altered because they are not relevant to the problem, as they don’t fetch data. The variables, functions, and data models in the code may sometimes have German names, but I hope you can still understand it. Thanks for your help! struct Provider: AppIntentTimelineProvider { //[Placeholder and snapshot] func timeline(for configuration: ConfigurationAppIntent, in context: Context) async -> Timeline<CleverEntry> { let entry = await loadAllVariables() return Timeline(entries: [entry], policy: .after(Date().addingTimeInterval(60 * 5))) } @MainActor private func getExam() -> [PruefungM] { //Old, local version /* guard let modelContainer = try? ModelContainer(for: PruefungM.self) else { return [] } let descriptor = FetchDescriptor<PruefungM>() let PRF = try? modelContainer.mainContext.fetch(descriptor) return PRF ?? [] */ do { let configuration = ModelConfiguration(cloudKitDatabase: .private("iCloud.my_bundle_id")) let container = try ModelContainer( for: PruefungM.self, configurations: configuration ) let descriptor = FetchDescriptor<PruefungM>() return try container.mainContext.fetch(descriptor) } catch { print("❌ Error(CloudKit): \(error)") return [] } } @MainActor private func getHAF() -> [HausaufgabeM] { do { let configuration = ModelConfiguration(cloudKitDatabase: .private("iCloud.my_bundle_id")) let container = try ModelContainer( for: HausaufgabeM.self, configurations: configuration ) let descriptor = FetchDescriptor<HausaufgabeM>() return try container.mainContext.fetch(descriptor) } catch { print("❌ Error (CloudKit): \(error)") return [] } } @MainActor private func loadAllVariables() -> CleverEntry { print("Function started") let HAF = getHAF() let PRF = getExam() //handling and returning the data } }

Hello everyone, I'm developing an app for iOS 18 using SwiftData, with iCloud synchronization enabled. My app also includes an interactive widget that allows users to mark tasks as complete, similar to Apple's Reminders widget. I'm facing a specific issue with how iCloud sync is triggered when changes are made from the widget. My Setup: Xcode 16 Swift 6 / iOS 18 SwiftData with iCloud Sync enabled. An interactive widget using App Intents to modify the SwiftData model. What's working correctly: App to Widget (Same Device): If I mark a task as complete in the main app, the widget on the same device updates instantly. Widget to App (Same Device): If I mark a task as complete using the interactive widget, the main app on the same device reflects this change immediately. App to App (Across Devices): If I make a change in the app on my iPhone, it syncs correctly via iCloud and appears in the app on my iPad. The Problem: The synchronization issue occurs specifically when an action is initiated from the widget and needs to be reflected on other devices, or when a change from another device needs to be reflected in the widget. Widget Change Not Syncing to Other Devices: If I mark a task as complete in the widget on my iPhone, the change does not sync to my iPad. The task on the iPad only updates after I manually open the main app on the iPhone. Remote Change Not Syncing to Widget: Similarly, if I mark a task as complete in the app on my iPad, the widget on my iPhone does not update to show this change. The widget only refreshes with the correct state after I open the main app on the iPhone. It seems that the widget's AppIntent correctly modifies the local SwiftData store, but this action isn't triggering the necessary background process to push the changes to iCloud. The sync only seems to happen when the main app, with its active ModelContainer, is brought to the foreground. My goal is for any change made in the widget to be reflected across all of the user's devices in near real-time, without requiring them to launch the main app to initiate the sync. Is there a specific API I need to call from my AppIntent to force a SwiftData sync, or a project capability I might be missing to allow the widget extension to trigger iCloud pushes? Any help or guidance would be greatly appreciated. Thank you!

I just made a small test app that uses SwiftData with CloudKit capability. I created a simple Book model as seen below. It looks like enums and structs when used with CloudKit capability all trigger this error: 'NSKeyedUnarchiveFromData' should not be used to for un-archiving and will be removed in a future release I fixed the error by using genreRaw String and using a computed property to use it in the app, but it popped back up after adding the ReadingProgress struct Should I ignore the error and assume Apple still supports enums and codable structs when using SwiftData with CloudKit? import SwiftData @Model class Book { var title: String = "" var author: String = "" var genreRaw: String = Genre.fantasy.rawValue var review: String = "" var rating: Int = 3 var progress: ReadingProgress? var genre: Genre { get { Genre(rawValue: genreRaw) ?? Genre.fantasy } set { genreRaw = newValue.rawValue } } init(title: String, author: String, genre: Genre, review: String, rating: Int, progress: ReadingProgress? = nil) { self.title = title self.author = author self.genre = genre self.review = review self.rating = rating self.progress = progress } } struct ReadingProgress: Codable { var currentPage: Int var totalPages: Int var isFinished: Bool var percentComplete: Double { guard totalPages > 0 else { return 0 } return Double(currentPage) / Double(totalPages) * 100 } } enum Genre: String, Codable, CaseIterable { case fantasy case scienceFiction case mystery case romance var displayName: String { switch self { case .fantasy: return "Fantasy" case .scienceFiction: return "Science Fiction" case .mystery: return "Mystery" case .romance: return "Romance" } } }

In iOS 26, should we have bootloader that runs the repo on startup - or should we have that inside tasks in root view? we have repos that runs as a «closed» functions, we dont throw but updates swiftdata and we use @query in the views. So what is best? and for the repo we should have a repo that runs the upserts manage relations eg? Should that run on a modelactor?

have a SwiftUI View where I can edit financial transaction information. The data is stored in SwiftData. If I enter a TextField element and start typing, it is super laggy and there are hangs of 1-2 seconds between each input (identical behaviour if debugger is detached). On the same view I have another TextField that is just attached to a @State variable of that view and TextField updates of that value work flawlessly. So somehow the hangs must be related to my SwiftData object but I cannot figure out why. This used to work fine until a few months ago and then I could see the performance degrading. I have noticed that when I use a placeholder variable like @State private var transactionSubject: String = "" and link that to the TextField, the performance is back to normal. I am then using .onSubmit { self.transaction.subject = self.transactionSubject } to update the value in the end but this again causes a 1 s hang. :/ Below the original code sample with some unnecessary stuff removed: struct EditTransactionView: View { @Environment(\.modelContext) var modelContext @Environment(\.dismiss) var dismiss @State private var testValue: String = "" @Bindable var transaction: Transaction init(transaction: Transaction) { self.transaction = transaction let transactionID = transaction.transactionID let parentTransactionID = transaction.transactionMasterID _childTransactions = Query(filter: #Predicate<Transaction> {item in item.transactionMasterID == transactionID }, sort: \Transaction.date, order: .reverse) _parentTransactions = Query(filter: #Predicate<Transaction> {item in item.transactionID == parentTransactionID }, sort: \Transaction.date, order: .reverse) print(_parentTransactions) } //Function to keep text length in limits func limitText(_ upper: Int) { if self.transaction.icon.count > upper { self.transaction.icon = String(self.transaction.icon.prefix(upper)) } } var body: some View { ZStack { Form{ Section{ //this one hangs TextField("Amount", value: $transaction.amount, format: .currency(code: Locale.current.currency?.identifier ?? "USD")) //this one works perfectly TextField("Test", text: $testValue) HStack{ TextField("Enter subject", text: $transaction.subject) .onAppear(perform: { UITextField.appearance().clearButtonMode = .whileEditing }) Divider() TextField("Select icon", text: $transaction.icon) .keyboardType(.init(rawValue: 124)!) .multilineTextAlignment(.trailing) } } } .onDisappear(){ if transaction.amount == 0 { // modelContext.delete(transaction) } } .onChange(of: selectedItem, loadPhoto) .navigationTitle("Transaction") .navigationBarTitleDisplayMode(.inline) .toolbar{ Button("Cancel", systemImage: "trash"){ modelContext.delete(transaction) dismiss() } } .sheet(isPresented: $showingImagePickerView){ ImagePickerView(isPresented: $showingImagePickerView, image: $image, sourceType: .camera) } .onChange(of: image){ let data = image?.pngData() if !(data?.isEmpty ?? false) { transaction.photo = data } } .onAppear(){ cameraManager.requestPermission() setDefaultVendor() setDefaultCategory() setDefaultGroup() } .sheet(isPresented: $showingAmountEntryView){ AmountEntryView(amount: $transaction.amount) } } } }

I have an app that from day 1 has used Swiftdata and successfully sync'd across devices with Cloudkit. I have added models to the data in the past and deployed the schema and it continued to sync across devices. Sometime I think in June.2025 I added a new model and built out the UI to display and manage it. I pushed a version to Test Flight (twice over a matter of 2 versions and a couple of weeks) and created objects in the new model in Test Flight versions of the app which should push the info to Cloudkit to update the schema. When I go to deploy the schema though there are no changes. I confirmed in the app that Cloudkit is selected and it's point to the correct container. And when I look in Cloudkit the new model isn't listed as an indes. I've pushed deploy schema changes anyway (more than once) and now the app isn't sync-ing across devices at all (even the pre-existing models aren't sync-ing across devices). I even submitted the first updated version to the app store and it was approved and released. I created objects in the new model in production which I know doesn't create the indexes in the development environment. But this new model functions literally everywhere except Cloudkit and I don't know what else to do to trigger an update.

Hi, I am currently experiencing some trouble when using parent model property in a predicate of a child model. I have an Item class that define parent-child relationship: @Model class Item { var timestamp: Date @Relationship(inverse: \Item.children) var parent: Item? var children: [Item] init(parent: Item? = nil, children: [Item] = [], timestamp: Date = .now) { self.parent = parent self.children = children self.timestamp = timestamp } } I subclass this model like that: @available(iOS 26, *) @Model final class CollectionItem: Item { /* ... */ } When i make a Query in my View like that the system crashes: @Query( filter: #Predicate<CollectionItem> { $0.parent == nil }, sort: \CollectionItem.name, ) private var collections: [CollectionItem] CrashReportError: Fatal Error in DataUtilities.swift AppName crashed due to fatalError in DataUtilities.swift at line 85. Couldn't find \CollectionItem.<computed 0x000000034005d4e8 (Optional<Item>)> on CollectionItem with fields [SwiftData.Schema.PropertyMetadata(name: "name", keypath: \CollectionItem.<computed 0x000000034003c120 (String)>, defaultValue: nil, metadata: nil), SwiftData.Schema.PropertyMetadata(name: "icon", keypath: \CollectionItem.<computed 0x000000034003ca04 (Optional<String>)>, defaultValue: nil, metadata: nil), SwiftData.Schema.PropertyMetadata(name: "timestamp", keypath: \Item.<computed 0x0000000340048018 (Date)>, defaultValue: nil, metadata: nil), SwiftData.Schema.PropertyMetadata(name: "parent", keypath: \Item.<computed 0x0000000340048a4c (Optional<Item>)>, defaultValue: nil, metadata: Optional(Relationship - name: , options: [], valueType: Any, destination: , inverseName: nil, inverseKeypath: Optional(\Item.<computed 0x0000000340048fe8 (Array<Item>)>))), SwiftData.Schema.PropertyMetadata(name: "children", keypath: \Item.<computed 0x0000000340048fe8 (Array<Item>)>, defaultValue: nil, metadata: nil)] When I query as Item it works but then i cannot sort on CollectionItem field and must add unnecessary down casting: @Query( filter: #Predicate<Item> { $0.parent == nil && $0 is CollectionItem }, ) private var items: [Item] Am I missing something? Is it a platform limitation or a known issue?

I really enjoyed using SwiftData for persistence until I found out that the CloudKit integration ensures changes are only eventually consistent, and that changes can propagate to other devices after as long as minutes, making it useless for any feature that involves handoff between devices. Devastating news but I guess it’s on me for nrtfm. I may try my hand at a custom model context DataStore integrating Powersync, but that’s a whole trip and before I embark on it I was wondering if anyone had suggestions for resolving this problem in a simple and elegant manager that allows me to keep as much of the machinery within Apple’s ecosystem as possible, while ensure reliable “live” updates to SwiftData stores on all eligible devices.

If Cloudkit is enabled, SwiftData @Query operation hangs when the View scenePhase becomes active. Seems like the more @Query calls you have, the more it hangs. This has been first documented some time ago, but in typical Apple style, it has not been addressed or even commented on. https://developer.apple.com/forums/thread/761434

Recently I've been working on a demo project called iLibrary. The main goal was to learn more about CloudKit and SwiftData. After a while I noticed that there were some hangs/freezes when running the app in debug mode. I first tried this with Xcode 15.4 and iOS 17.5. Here the hang only appears at the beginning, but only for a few seconds. But when I exit debug mode, there are no more hangs. With Xcode 16 beta 4 and iOS 18 it looks completely different. In this case, the hangs and freezes are always present, whether in debug mode or not. And it's not just at the beginning, it's throughout the app. I'm aware that this is still a beta, but I still find this weird. And when I profile this I see that the main thread gets quite overloaded. Interestingly, my app doesn't have that many operations going on. So I guess something with the sync of SwiftData or my CloudKitManger where I fetch some records from the public database is not running fine. Lastly, I wanted to delete the iCloud app data. So I went to Settings and tried to delete it, but it didn't work. Is this normal? Does anyone have any idea what this could be? Or has anyone encountered this problem as well? I'd appreciate any support. My project: https://github.com/romanindermuehle/iLibrary

I have an iOS app with a main target and an app extension. I want the app extension to write data to the SwiftData in App Groups, while the main target reads the data. However, currently, the app extension only has permission to read data, not to write it.Is the issue due to my incorrect configuration or an Apple-imposed restriction?

What is the correct way to track the number of items in a relationship using SwiftData and SwiftUI? Imagine a macOS application with a sidebar that lists Folders and Tags. An Item can belong to a Folder and have many Tags. In the sidebar, I want to show the name of the Folder or Tag along with the number of Items in it. I feel like I'm missing something obvious within SwiftData to wire this up such that my SwiftUI views correctly updated whenever the underlying modelContext is updated. // The basic schema @Model final class Item { var name = "Untitled Item" var folder: Folder? = nil var tags: [Tag] = [] } @Model final class Folder { var name = "Untitled Folder" var items: [Item] = [] } @Model final class Tag { var name = "Untitled Tag" var items: [Item] = [] } // A SwiftUI view to show a Folder. struct FolderRowView: View { let folder: Folder // Should I use an @Query here?? // @Query var items: [Item] var body: some View { HStack { Text(folder.name) Spacer() Text(folder.items.count.formatted()) } } } The above code works, once, but if I then add a new Item to that Folder, then this SwiftUI view does not update. I can make it work if I use an @Query with an #Predicate but even then I'm not quite sure how the #Predicate is supposed to be written. (And it seems excessive to have an @Query on every single row, given how many there could be.) struct FolderView: View { @Query private var items: [Item] private var folder: Folder init(folder: Folder) { self.folder = folder // I've read online that this needs to be captured outside the Predicate? let identifier = folder.persistentModelID _items = Query(filter: #Predicate { link in // Is this syntax correct? The results seem inconsistent in my app... if let folder = link.folder { return folder.persistentModelID == identifier } else { return false } }) } var body: some View { HStack { Text(folder.name) Spacer() // This mostly works. Text(links.count.formatted()) } } } As I try to integrate SwiftData and SwiftUI into a traditional macOS app with a sidebar, content view and inspector I'm finding it challenging to understand how to wire everything up. In this particular example, tracking the count, is there a "correct" way to handle this?

This simple test fails in my project. Similar code in my application also crashes. How do I debug the problem? What project settings are required. I have added SwiftData as a framework to test (and application) targets? Thanks, The problem is with: modelContext.insert(item) Thread 1: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) import XCTest import SwiftData @Model class FakeModel { var name: String init(name: String) { self.name = name } } @MainActor final class FakeModelTests: XCTestCase { var modelContext: ModelContext! override func setUp() { super.setUp() do { let container = try ModelContainer(for: FakeModel.self, configurations: ModelConfiguration(isStoredInMemoryOnly: true)) modelContext = container.mainContext } catch { XCTFail("Failed to create ModelContainer: \(error)") modelContext = nil } } func testSaveFetchDeleteFakeItem() { guard let modelContext = modelContext else { XCTFail("ModelContext must be initialized") return } let item = FakeModel(name: "Test") modelContext.insert(item) let fetchDescriptor = FetchDescriptor<FakeModel>() let items = try! modelContext.fetch(fetchDescriptor) XCTAssertEqual(items.count, 1) XCTAssertEqual(items.first?.name, "Test") modelContext.delete(item) let itemsAfterDelete = try! modelContext.fetch(fetchDescriptor) XCTAssertEqual(itemsAfterDelete.count, 0) } }

I have a UIKit app where I've adopted SwiftData and I'm struggling with a crash coming in from some of my users. I'm not able to reproduce it myself and as it only happens to a small fraction of my user base, it seems like a race condition of some sort. This is the assertion message: SwiftData/DefaultStore.swift:453: Fatal error: API Contract Violation: Editors must register their identifiers before invoking operations on this store SwiftData.DefaultStore: 00CF060A-291A-4E79-BEC3-E6A6B20F345E did not. (ID is unique per crash) This is the ModelActor that crashes: @available(iOS 17, *) @ModelActor actor ConsumptionDatabaseStorage: ConsumptionSessionStorage { struct Error: LocalizedError { var errorDescription: String? } private let sortDescriptor = [SortDescriptor(\SDConsumptionSession.startTimeUtc, order: .reverse)] static func createStorage(userId: String) throws -> ConsumptionDatabaseStorage { guard let appGroupContainer = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: UserDefaults.defaultAppGroupIdentifier) else { throw Error(errorDescription: "Invalid app group container ID") } func createModelContainer(databaseUrl: URL) throws -> ModelContainer { return try ModelContainer(for: SDConsumptionSession.self, SDPriceSegment.self, configurations: ModelConfiguration(url: databaseUrl)) } let databaseUrl = appGroupContainer.appendingPathComponent("\(userId).sqlite") do { return self.init(modelContainer: try createModelContainer(databaseUrl: databaseUrl)) } catch { // Creating the model storage failed. Remove the database file and try again. try? FileManager.default.removeItem(at: databaseUrl) return self.init(modelContainer: try createModelContainer(databaseUrl: databaseUrl)) } } func isStorageEmpty() async -> Bool { (try? self.modelContext.fetchCount(FetchDescriptor<SDConsumptionSession>())) ?? 0 == 0 // <-- Crash here! } func sessionsIn(interval: DateInterval) async throws -> [ConsumptionSession] { let fetchDescriptor = FetchDescriptor(predicate: #Predicate<SDConsumptionSession> { sdSession in if let startDate = sdSession.startTimeUtc { return interval.start <= startDate && interval.end > startDate } else { return false } }, sortBy: self.sortDescriptor) let consumptionSessions = try self.modelContext.fetch(fetchDescriptor) // <-- Crash here! return consumptionSessions.map { ConsumptionSession(swiftDataSession: $0) } } func updateSessions(sessions: [ConsumptionSession]) async throws { if #unavailable(iOS 18) { // Price segments are duplicated if re-inserted so unfortunately we have to delete and reinsert sessions. // On iOS 18, this is enforced by the #Unique macro on SDPriceSegment. let sessionIds = Set(sessions.map(\.id)) try self.modelContext.delete(model: SDConsumptionSession.self, where: #Predicate<SDConsumptionSession> { sessionIds.contains($0.id) }) } for session in sessions { self.modelContext.insert(SDConsumptionSession(consumptionSession: session)) } if self.modelContext.hasChanges { try self.modelContext.save() } } func deleteAllSessions() async { if #available(iOS 18, *) { try? self.modelContainer.erase() } else { self.modelContainer.deleteAllData() } } } The actor conforms to this protocol: protocol ConsumptionSessionStorage { func isStorageEmpty() async -> Bool func hasCreditCardSessions() async -> Bool func sessionsIn(interval: DateInterval) async throws -> [ConsumptionSession] func updateSessions(sessions: [ConsumptionSession]) async throws func deleteAllSessions() async } The crash is coming in from line 30 and 41, in other words, when trying to fetch data from the database. There doesn't seem to be any common trait for the crashes. They occur across iOS versions and device types. Any idea what might cause this?

Environment visionOS 26 Xcode 26 Issue I am experiencing crash when trying to access a [String] from a @Model data, after dismissing an immersiveSpace and opening a WindowGroup. This crash only occurs when trying to access the [String] property of my Model. It works fine with other properties. Thread 1: Fatal error: This backing data was detached from a context without resolving attribute faults: PersistentIdentifier(...) Steps to Reproduce Open WindowGroup Dismiss window, open ImmersiveSpace Dismiss ImmersiveSpace, reopen WindowGroup Any guidance would be appreciated! @main struct MyApp: App { var body: some Scene { WindowGroup(id: "main") { ContentView() } .modelContainer(for: [Item.self]) ImmersiveSpace(id: "immersive") { ImmersiveView() } } } // In SwiftData model @Model class Item { var title: String = "" // Accessing this property works fine var tags: [String] = [] @storageRestrictions(accesses: _$backingData, initializes: _tags) init(initialValue) { _$backingData.setValue(forKey: \. tags, to: initialValue) _tags =_ SwiftDataNoType() } get { _$observationRegistrar.access(self, keyPath: \.tags) **return self getValue(forkey: \.tags)** // Crashes here }

I'm working with SwiftData and SwiftUI and it's not clear to me if it is good practice to have a @ModelActor directly populate a SwiftUI view. For example when having to combine manual lab results and clinial results from HealthKit. The Clinical lab results are an async operation: @ModelActor actor LabResultsManager { func fetchLabResultsWithHealthKit() async throws -> [LabResultDto] { let manualEntries = try modelContext.fetch(FetchDescriptor<LabResult>()) let clinicalLabs = (try? await HealthKitService.getLabResults()) ?? [] return (manualEntries + clinicalLabs).sorted { $0.date > $1.date }.map { return LabResultDto(from: $0) } } } struct ContentView: View { @State private var labResults: [LabResultDto] = [] var body: some View { List(labResults, id: \.id) { result in VStack(alignment: .leading) { Text(result.testName) Text(result.date, style: .date) } } .task { do { let labManager = LabResultsManager() labResults = try await labManager.fetchLabResultsWithHealthKit() } catch { // Handle error } } } } EDIT: I have a few views that would want to use these labResults so I need an implementation that can be reused. Having to fetch and combine in each view will not be good practice. Can I pass a modelContext to a viewModel?

I've been seeing something that I find odd when using two SwiftData models where if I have one model (book, in this case) that has an optional array of another model (page, in this case), the optional array starts out as set to nil, but after about 20 seconds it updates to being an empty array. I see it in Previews and after building. Is this expected behavior? Should I just assume that if there is an optional array in my model it will eventually be initialized to an empty array? Code is below. import SwiftUI import SwiftData @Model final class Book { var title: String = "New Book" @Relationship var pages: [Page]? = nil init(title: String) { self.title = title } } @Model final class Page { var content: String = "Page Content" var book: Book? = nil init() { } } struct ContentView: View { @Environment(\.modelContext) private var modelContext @Query private var books: [Book] var body: some View { NavigationSplitView { List { ForEach(books) { book in NavigationLink { Text("\(book.title)") Text(book.pages?.debugDescription ?? "pages is nil") } label: { Text("\(book.title)") Spacer() Text("\(book.pages?.count.description ?? "pages is nil" )") } } } HStack { Button("Clear Data") { clearData() } Button("Add Book") { addBook() } } .navigationSplitViewColumnWidth(min: 180, ideal: 200) } detail: { Text("Select an item") } } private func clearData() { for book in books { modelContext.delete(book) } try? modelContext.save() } private func addBook() { let newBook = Book(title: "A New Book") modelContext.insert(newBook) } } @main struct BookPageApp: App { var sharedModelContainer: ModelContainer = { let schema = Schema([Book.self, Page.self]) let modelConfiguration = ModelConfiguration(schema: schema, isStoredInMemoryOnly: false) do { return try ModelContainer(for: schema, configurations: [modelConfiguration]) } catch { fatalError("Could not create ModelContainer: \(error)") } }() var body: some Scene { WindowGroup { ContentView() } .modelContainer(sharedModelContainer) } } #Preview { ContentView() .modelContainer(for: Book.self, inMemory: true) }

I have a ModelActor that creates a hierarchy of models and returns a PersistentIdentifier for the root. I'd like to do that in a transaction, but I don't know of a good method of getting that identifier if the models are created in a transaction. For instance, an overly simple example: func createItem(timestamp: Date) throws -> PersistentIdentifier { try modelContext.transaction { let item = Item(timestamp: timestamp) modelContext.insert(item) } // how to return item.persistentModelID? } I can't return the item.persistentModelID from the transaction closure and even if I could, it will be a temporary ID until after the transaction is executed. I can't create the Item outside the transaction and just have the transaction do an insert because swift will raise a data race error if you then try to return item.persistentModelID. Is there any way to do this besides a modelContext.fetch* with separate unique identifiers?

I have an app with fairly typical requirements - I need to insert some data (in my case from the network but could be anything) and I want to do it in the background to keep the UI responsive. I'm using SwiftData. I've created a ModelActor that does the importing and using the debugger I can confirm that the data is indeed being inserted. On the UI side, I'm using @Query and a SwiftUI List to display the data but what I am seeing is that @Query is not updating as the data is being inserted. I have to quit and re-launch the app in order for the data to appear, almost like the context running the UI isn't communicating with the context in the ModelActor. I've included a barebones sample project. To reproduce the issue, tap the 'Background Insert' button. You'll see logs that show items being inserted but the UI is not showing any data. I've tested on the just released iOS 18b3 seed (22A5307f). The sample project is here: https://hanchor.s3.amazonaws.com/misc/SwiftDataBackgroundV2.zip

I’m building a document-based SwiftData app (iPhone/iPad/Mac). Here’s a minimal example of how I’m using DocumentGroup. DocumentGroup(editing: Trip.self, contentType: .trips) { ContentView() } if #available(iOS 18.0, *) { DocumentGroupLaunchScene { NewDocumentButton("New Trip") } } I’m struggling with the toolbar behavior in DocumentGroup apps. My content view uses a TabView, and each tab contains a NavigationSplitView. After I select a document in the document browser, I see my tabs. Regardless of which tab is selected, there’s a navigation bar showing the document name and a back button to the document browser. However, only the first tab shows the disclosure button to rename the document. I’d expect to be able to rename the document anywhere the name is shown. When I navigate to the detail view of my NavigationSplitView (or when using NavigationView/NavigationStack), I still see that back button to the document browser. When the user taps it, they expect to go back to the previous view, not to the document browser. What’s really odd is that even sheet or fullScreenCover presentations include these document UI elements in the navigation bar. I can’t get rid of them. Even if I set a title via the toolbar or navigationTitle, the rename disclosure button remains visible. Do DocumentGroup apps intentionally show their specific navigation bar everywhere? Is this a bug or expected behavior? And is it expected that the rename disclosure button appears only on the first tab of a TabView?