Hi, I have created an AppIntent in which there is a parameter called price, I have set the default value as 0. @Parameter(title: "Price", default: 0) var price: Int Problem When the shortcut is run this parameter is skipped Aim I still want to price to be asked however it needs to be pre-filled with 0 Question What should I do that the shortcut can still ask the price but be pre-filled with 0?

Overview I have a custom type Statistics that has 3 properties inside it I am trying to return this as part of the AppIntent's perforrm method struct Statistics { var countA: Int var countB: Int var countC: Int } I would like to implement the AppIntent to return Statistics as follows: func perform() async throws -> some IntentResult & ReturnsValue<Statistics> { ... ... } Problem It doesn't make much sense to make Statistics as an AppEntity as this is only computed as a result. Statistics doesn't exist as a persisted entity in the app. Questions How can I implement Statistics? Does it have to be AppEntity (I am trying to avoid this)? (defaultQuery would never be used.) What is the correct way tackle this?

Problem When a List / Form is added inside a TabView and navigationTitle is set, then switching between tabs causes the navigation title to flicker. Feedback: FB21436493 Environment Xcode: 26.2 (17C52) iOS: 26.2 (23C55) Reproducible on: Both simulator and device Root cause When List / Form is commented out, issue doesn't occur Steps to Reproduce Run app on iOS Switch between tabs Notice that the navigation title flickers Code ContentView import SwiftUI struct ContentView: View { @State private var selectedTab = TabItem.red var body: some View { NavigationStack { TabView(selection: $selectedTab) { ForEach(TabItem.allCases, id: \.self) { tab in Tab(tab.rawValue, systemImage: tab.systemImageName , value: tab) { // Problem occurs with a List / Form // Commenting out list works without flickering title List { Text(tab.rawValue) } } } } .navigationTitle(selectedTab.rawValue) } } } TabItem enum TabItem: String, CaseIterable { case red case green case blue var systemImageName: String { switch self { case .red: "car" case .green: "leaf" case .blue: "bus" } } } Screen recording:

Problem For a mac app, when the Settings view that uses @Environment(\.dismiss) it causes the subview's models to be created multiple times. Environment macOS: 26.2 (25C56) Feedback FB21424864 Code App @main struct DismissBugApp: App { var body: some Scene { WindowGroup { ContentView() } Settings { SettingsView() } } } ContentView struct ContentView: View { var body: some View { Text("Content") } } SettingsView struct SettingsView: View { @Environment(\.dismiss) private var dismiss var body: some View { VStack { Text("Settings") SectionAView() } } } SectionAView struct SectionAView: View { @State private var model = SectionAViewModel() var body: some View { Text("A") .padding(40) } } SectionAViewModel @Observable class SectionAViewModel { init() { print("SectionAViewModel - init") } deinit { print("SectionAViewModel - deinit") } } Steps to reproduce (refer to the attached video) 1 - Run the app on the mac 2 - Open app's Settings 3 - Notice the following logs being printed in the console: SectionAViewModel - init SectionAViewModel - init 4 - Tap on some other app, so that the app loses focus 5 - Notice the following logs being printed in the console: SectionAViewModel - init SectionAViewModel - deinit 6 - Bring the app back to focus 7 - Notice the following logs being printed in the console: SectionAViewModel - init SectionAViewModel - deinit Refer to screen recording

Problem On the macOS when Settings view is closed, the @State model is not deallocated Feedback FB21393010 Environment macOS: 26.2 (25C56) Xcode: 26.2 (17C52) Steps to reproduce Run the project Open app's 'Settings Look at the console logs When model is created SettingsModel - init gets printed When Settings window is closed SettingsModel - deinit is not printed, meaning it is not deallocated Code SettingsModel import SwiftUI @Observable class SettingsModel { init() { print("SettingsModel - init") } deinit { print("SettingsModel - deinit") } } SettingsView import SwiftUI struct SettingsView: View { @State var model = SettingsModel() var body: some View { Text("Settings") .font(.largeTitle) .padding(200) } } App import SwiftUI @main struct SettingsBugApp: App { var body: some Scene { WindowGroup { ContentView() } Settings { SettingsView() } } }

Hi, Overview I have a Mac app with a settings window. When I add a button it is added to the center. I want it on the trailing edge, I even tried adding it as confirmationAction but doesn’t work. Screenshot Feedback FB21374186 Steps to reproduce Run the project on mac Open the app's settings by pressing ⌘ , Notice that the Save button is in the center instead of the trailing edge Code App import SwiftUI @main struct SettingsToolbarButtonBugApp: App { var body: some Scene { WindowGroup { ContentView() } Settings { SettingsView() .frame(width: 300, height: 400) } } } SettingsView import SwiftUI struct SettingsView: View { var body: some View { NavigationStack { Form { Text("Settings window") } .toolbar { ToolbarItem(placement: .confirmationAction) { // Save button is the center instead of trailing edge Button("Save") {} } } .navigationTitle("Settings") } } }

Hi, Problem When playing videos on the Developer app on the Mac, there is no full screen button for the video. So it is not possible to play the video in full screen. Note I am not referring to the app going into full screen, the issue is with there is no option to play the video in full screen. Environment OS: macOS 26.2 (25C56) Developer app: Version 10.8.3 (1083.3.1) Feedback FB21343934 Recording Question Are others also facing this issue? Is there a workaround? Suggestion This seems to be recurring problem that seems get broken with app / OS releases. Please write some UI tests to ensure the full screen button is present. Would really appreciate if this gets fixed.

Overview Tapping on ShareLink crashes the app when ShareLink is added in the toolbar with the placement of secondaryAction Feedback FB21337385 Note: Apple engineers please priorities this is a blocker and affects production apps and prevents us from going live. Environment Xcode: 26.2 (17C52) iOS: 26.2 iPadOS: 26.2 Reproduce Able to reproduce 100% both on Simulator and Device Isolation of the crash The crash happens only when the ShareLink is used with the placement .secondaryAction The crash doesn't 'happen when the ShareLink is used with the placement .primaryAction Code import SwiftUI struct ContentView: View { var body: some View { NavigationStack { Text("Hello, world!") .toolbar { ToolbarItem(placement: .primaryAction) { Button("Dummy") { print("dummy") } } // Tapping on share button will cause it to crash // Crash only happens when the ShareLink is used with placement .secondaryAction // It doesn't crash when placement is primaryAction ToolbarItem(placement: .secondaryAction) { ShareLink(item: "Some string") } } } } } Crash stack trace *** Terminating app due to uncaught exception 'NSGenericException', reason: 'UIPopoverPresentationController (<_UIActivityViewControllerPresentationController: 0x105a3b580>) should have a non-nil sourceView or barButtonItem set before the presentation occurs.' *** First throw call stack: ( 0 CoreFoundation 0x00000001804f71d0 __exceptionPreprocess + 172 1 libobjc.A.dylib 0x000000018009c094 objc_exception_throw + 72 2 UIKitCore 0x0000000185a5b17c -[UIPopoverPresentationController presentationTransitionWillBegin] + 2712 3 UIKitCore 0x0000000185a65de0 -[UIPresentationController _presentationTransitionWillBegin] + 28 4 UIKitCore 0x0000000185a6523c __80-[UIPresentationController _initViewHierarchyForPresentationSuperview:inWindow:]_block_invoke + 1928 5 UIKitCore 0x0000000185a633ec __77-[UIPresentationController runTransitionForCurrentStateAnimated:handoffData:]_block_invoke_3 + 296 6 UIKitCore 0x00000001868b2950 -[_UIAfterCACommitBlock run] + 64 7 UIKitCore 0x00000001868b2d64 -[_UIAfterCACommitQueue flush] + 164 8 UIKitCore 0x0000000186354f04 _runAfterCACommitDeferredBlocks + 256 9 UIKitCore 0x0000000186346bec _cleanUpAfterCAFlushAndRunDeferredBlocks + 76 10 UIKitCore 0x0000000186346cb4 _UIApplicationFlushCATransaction + 68 11 UIKitCore 0x0000000186263c48 __setupUpdateSequence_block_invoke_2 + 372 12 UIKitCore 0x000000018582f378 _UIUpdateSequenceRunNext + 120 13 UIKitCore 0x00000001862640a4 schedulerStepScheduledMainSectionContinue + 56 14 UpdateCycle 0x00000002501912b4 _ZN2UC10DriverCore18continueProcessingEv + 80 15 CoreFoundation 0x000000018041a4ac __CFMachPortPerform + 164 16 CoreFoundation 0x0000000180456aa8 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 56 17 CoreFoundation 0x00000001804560c0 __CFRunLoopDoSource1 + 480 18 CoreFoundation 0x0000000180455188 __CFRunLoopRun + 2100 19 CoreFoundation 0x000000018044fcec _CFRunLoopRunSpecificWithOptions + 496 20 GraphicsServices 0x0000000192a669bc GSEventRunModal + 116 21 UIKitCore 0x0000000186348574 -[UIApplication _run] + 772 22 UIKitCore 0x000000018634c79c UIApplicationMain + 124 23 SwiftUI 0x00000001da58d620 $s7SwiftUI17KitRendererCommon33_ACC2C5639A7D76F611E170E831FCA491LLys5NeverOyXlXpFAESpySpys4Int8VGSgGXEfU_ + 164 24 SwiftUI 0x00000001da58d368 $s7SwiftUI6runAppys5NeverOxAA0D0RzlF + 180 25 SwiftUI 0x00000001da31b42c $s7SwiftUI3AppPAAE4mainyyFZ + 148 26 ShareLinkSecondaryPlacementDemo.deb 0x0000000104d82b0c $s31ShareLinkSecondaryPlacementDemo0abcdE3AppV5$mainyyFZ + 40 27 ShareLinkSecondaryPlacementDemo.deb 0x0000000104d82bb8 __debug_main_executable_dylib_entry_point + 12 28 dyld 0x0000000104cc53d0 start_sim + 20 29 ??? 0x0000000104ff0d54 0x0 + 4378791252 ) libc++abi: terminating due to uncaught exception of type NSException

Overview I have an iOS project where I have a list with sections. Each cell in the section can be swiped to have some action What needs to be done When swipe button is pressed the cell needs to move from one section to the other without a UI glitch. Problem When I press the swipe action button, there is a UI glitch and some warnings are thrown. UICollectionView internal inconsistency: unexpected removal of the current swipe occurrence's mask view. Please file a bug against UICollectionView. Reusable view: <SwiftUI.ListCollectionViewCell: 0x10700c200; baseClass = UICollectionViewListCell; frame = (16 40.3333; 370 52); hidden = YES; layer = <CALayer: 0x600000c12fa0>>; Collection view: <SwiftUI.UpdateCoalescingCollectionView: 0x106820800; baseClass = UICollectionView; frame = (0 0; 402 874); clipsToBounds = YES; autoresize = W+H; gestureRecognizers = <NSArray: 0x600000c13330>; backgroundColor = <UIDynamicSystemColor: 0x60000173a9c0; name = systemGroupedBackgroundColor>; layer = <CALayer: 0x600000c3a070>; contentOffset: {0, -62}; contentSize: {402, 229}; adjustedContentInset: {62, 0, 34, 0}; layout: <UICollectionViewCompositionalLayout: 0x10590edb0>; dataSource: <_TtGC7SwiftUI31UICollectionViewListCoordinatorGVS_28CollectionViewListDataSourceOs5Never_GOS_19SelectionManagerBoxS2___: 0x106822a00>>; Swipe occurrence: <UISwipeOccurrence: 0x103c161f0; indexPath: <NSIndexPath: 0xab1f048608f3828b> {length = 2, path = 0 - 0}, state: .triggered, direction: left, offset: 0> Test environment: Xcode 26.0.1 (17A400) iOS 26 Simulator (iPhone 17 Pro) Feedback filed: FB20890361 Code I have pasted below the minimum reproducible code ContentView import SwiftUI struct ContentView: View { @State private var dataStore = DataStore() var body: some View { List { ToDoSection(status: .notStarted, toDos: notStartedToDos) ToDoSection(status: .inProgress, toDos: inProgressToDos) ToDoSection(status: .completed, toDos: completedTodos) } } var notStartedToDos: [Binding<ToDoItem>] { $dataStore.todos.filter { $0.wrappedValue.status == .notStarted } } var inProgressToDos: [Binding<ToDoItem>] { $dataStore.todos.filter { $0.wrappedValue.status == .inProgress } } var completedTodos: [Binding<ToDoItem>] { $dataStore.todos.filter { $0.wrappedValue.status == .completed } } } ToDoSection import SwiftUI struct ToDoSection: View { let status: ToDoItem.Status let toDos: [Binding<ToDoItem>] var body: some View { if !toDos.isEmpty { Section(status.title) { ForEach(toDos) { toDo in Text(toDo.wrappedValue.title) .swipeActions(edge: .trailing) { if status == .notStarted { Button("Start") { toDo.wrappedValue.status = .inProgress } } if status != .completed { Button("Complete") { toDo.wrappedValue.status = .completed } Button("Move back") { toDo.wrappedValue.status = .notStarted } } } } } } } } ToDoItem import Foundation struct ToDoItem: Identifiable { let id: UUID let title: String var status: Status } extension ToDoItem { enum Status: Equatable { case notStarted case inProgress case completed var title: String { switch self { case .notStarted: "Not Started" case .inProgress: "In Progress" case .completed: "Completed" } } } } DataStore import Foundation @Observable class DataStore { var todos: [ToDoItem] init() { todos = [ ToDoItem(id: UUID(), title: "aaa", status: .notStarted), ToDoItem(id: UUID(), title: "bbb", status: .notStarted), ToDoItem(id: UUID(), title: "ccc", status: .notStarted) ] } }

My observations: Passing a FocusState.Binding using focusedSceneValue seems to work only when the app uses a WindowGroup. When the app uses a Window (single window) passing the FocusState.Binding in focusedSceneValue doesn't seem to work. When app uses Window passing FocusState.Binding using focusedValue and receiving it in @FocusedValue seems to work. Question: Is this expected behaviour? (should focusedSceneValue only work for WindowGroup and not for Window?)

Problem The following code doesn't work: let predicate = #Predicate<Car> { car in car.size == size //This doesn't work } Console Error Query encountered an error: SwiftData.SwiftDataError(_error: SwiftData.SwiftDataError._Error.unsupportedPredicate) Root cause Size is an enum, #Predicate works with other type such as String however doesn't work with enum Enum value is saved however is not filtered by #Predicate Environment Xcode: 15.0 (15A240d) - App Store macOS: 14.0 (23A339) - Release Candidate Steps to reproduce Run the app on iOS 17 or macOS Sonoma Press the Add button Notice that the list remains empty Expected behaviour List should show the newly created small car Actual behaviour List remains empty inspite of successfully creating the small car. Feedback FB13194334 Code Size enum Size: String, Codable { case small case medium case large } Car import SwiftData @Model class Car { let id: UUID let name: String let size: Size init( id: UUID, name: String, size: Size ) { self.id = id self.name = name self.size = size } } ContentView struct ContentView: View { var body: some View { NavigationStack { CarList(size: .small) } } CarList import SwiftUI import SwiftData struct CarList: View { let size: Size @Environment(\.modelContext) private var modelContext @Query private var cars: [Car] init(size: Size) { self.size = size let predicate = #Predicate<Car> { car in car.size == size //This doesn't work } _cars = Query(filter: predicate, sort: \.name) } var body: some View { List(cars) { car in VStack(alignment: .leading) { Text(car.name) Text("\(car.size.rawValue)") Text(car.id.uuidString) .font(.footnote) } } .toolbar { Button("Add") { createCar() } } } private func createCar() { let name = "aaa" let car = Car( id: UUID(), name: name, size: size ) modelContext.insert(car) } }

Problem When copyable is used with NavigationSplitView then it doesn't work The menu Edit > Copy is disabled Note When copyable is not used with a NavigationSplitView and used only with a plain List then it works. Question Is there anything I am missing? Feedback FB12990593 Platform macOS 14.0 Beta (23A5312d) Xcode 15.0 beta 6 (15A5219j) Steps to reproduce Run the app on mac Select some cars Press Command C Expected Behaviour Menu Edit > Copy should be enabled Pressing Command C should allow user to copy selected cars Actual Behaviour Menu Edit > Copy is disabled Pressing Command C doesn't allow user to copy selected cars Code struct ContentView: View { @State private var dataStore = DataStore() var body: some View { NavigationSplitView { Color.brown } detail: { CarListView(dataStore: dataStore) } } } struct CarListView: View { let dataStore: DataStore @State private var selectedCarIDs = Set<UUID>() var body: some View { List(selection: $selectedCarIDs) { ForEach(dataStore.cars) { car in CarCell(car: car) .draggable(car) } } .copyable(selectedCars()) } private func selectedCars() -> [Car] { dataStore.cars.filter { selectedCarIDs.contains($0.id) } } } struct CarCell: View { let car: Car var body: some View { VStack(alignment: .leading) { Text(car.name) Text("\(car.price)") } } } @Observable class DataStore { var cars = [ Car(name: "aaa", price: 10), Car(name: "bbb", price: 20), Car(name: "ccc", price: 30), Car(name: "ddd", price: 40) ] } struct Car: Codable, Transferable, Identifiable { let id: UUID let name: String let price: Int init(name: String, price: Int) { self.id = UUID() self.name = name self.price = price } static var transferRepresentation: some TransferRepresentation { CodableRepresentation(contentType: .car) } } extension UTType { static let car = UTType("com.example.car")! }

Problem When app is run on iPhone 14 pro simulator running iOS 17 tapping on the EditButton shows the text "No folder selected" Feedback Feedback ID: FB12953838 Steps to reproduce: Run the app on iOS 17 iPhone simulator Tap on the "Edit" Button Expected Behaviour The view should show the car list in the edit mode Actual Behaviour The view shows the text "No folder selected" Note: Problem happens only the first time, subsequently EditButton works fine. Environment: iOS: 17 Platform: iPhone 14 pro simulator Xcode: 15.0 beta 6 (15A5219j) Code ContentView import SwiftUI struct ContentView: View { @State private var selectedFolderID: Int? @StateObject private var dataStore = DataStore() var body: some View { NavigationSplitView { FolderListView( selectedFolderID: $selectedFolderID, dataStore: dataStore ) } detail: { if let selectedFolderID { CarListView( selectedFolderID: selectedFolderID, dataStore: dataStore ) } else { Text("No folder selected") } } } } FolderListView import SwiftUI struct FolderListView: View { @Binding var selectedFolderID: Int? @ObservedObject var dataStore: DataStore var body: some View { List(dataStore.folders, selection: $selectedFolderID) { folder in NavigationLink(value: folder.id) { Text(folder.name) } } .task { selectedFolderID = dataStore.folders.first?.id } } } CarListView import SwiftUI struct CarListView: View { let selectedFolderID: Int @ObservedObject var dataStore: DataStore @State private var selectedCarIDs = Set<Int>() var body: some View { List( dataStore.cars(withFolderID: selectedFolderID), selection: $selectedCarIDs ) { car in Text(car.name) } .toolbar { //Tapping on the EditButton on the iPhone, shows the text "No folder selected". EditButton() } } } DataStore import Foundation class DataStore: ObservableObject { @Published var folders = [Folder(id: 0, name: "Folder 1"), Folder(id: 1, name: "Folder 2"), Folder(id: 2, name: "Folder 3"), Folder(id: 3, name: "Folder 4"), Folder(id: 4, name: "Folder 5")] @Published var carIDsInFolder: [Folder.ID : [Car.ID]] = [0: [0, 1], 1: [2, 3], 2: [4, 5], 3: [6, 7], 4: [8, 9]] @Published var cars = [Car(id: 0, name: "aaa", price: 100), Car(id: 1, name: "bbb", price: 110), Car(id: 2, name: "ccc", price: 120), Car(id: 3, name: "ddd", price: 130), Car(id: 4, name: "eee", price: 140), Car(id: 5, name: "fff", price: 150), Car(id: 6, name: "iii", price: 160), Car(id: 7, name: "jjj", price: 170), Car(id: 8, name: "***", price: 180), Car(id: 9, name: "lll", price: 190)] func cars(withFolderID folderID: Folder.ID) -> [Car] { let carIDs = carIDsInFolder[folderID] ?? [] return carIDs.compactMap { car(withID: $0) } } func car(withID carID: Car.ID) -> Car? { cars.first { $0.id == carID } } } Car import Foundation struct Car: Identifiable { var id: Int var name: String var price: Int } Folder import Foundation struct Folder: Identifiable { var id: Int var name: String }

Problem: On macOS, unable to drag multiple car items from FolderDetail List Single items from a list are draggable but multiple items are not draggable. Feedback FB10128110 I am really saddened that this is not fixed for over a year. Please look into this. Platform macOS 14 (beta 3), macOS 13 Steps to reproduce Run the code provided below Tap the sidebar button to show the sidebar Select "Folder 0" from the sidebar Drag "car a" into "Folder 1" (Go to Folder 2 to notice this happened successfully, you will be able to see "car a" in Folder 1) Select "Folder 0" from the sidebar Select "car a" and "car b" and try to drag them to "Folder 2" Expected Behaviour "car a" and "car b" must be both draggable (multiple items should be draggable). The entire cell needs to be draggable not just the Text. Actual Behaviour Though “car a” and “car b” are selected, when dragged only one of the 2 items is dragged You also can drag them only when dragging the Text unlike in iOS where you can drag the cell. Note: Same code works on iOS Code: UTType extension UTType { static var car = UTType(exportedAs: "com.example.DragAndDropListDemo.car") } Car import Foundation import CoreTransferable struct Car: Identifiable { var id: Int var name: String } //extension Car: Codable {} extension Car: Codable, Transferable { static var transferRepresentation: some TransferRepresentation { CodableRepresentation(contentType: .car) } } Folder struct Folder: Identifiable, Hashable { var id: Int var name: String } DataStore class DataStore: ObservableObject { var folders = (0..<100).map { Folder(id: $0, name: "folder \($0)")} var cars = [0: [Car(id: 0, name:"car a"), Car(id: 1, name:"car b")], 1: [Car(id: 2, name:"car c"), Car(id: 3, name:"car d")]] } Views ContentView struct ContentView: View { @StateObject private var dataStore = DataStore() @State private var selectedFolder: Folder? var body: some View { NavigationSplitView { FolderList(selectedFolder: $selectedFolder, dataStore: dataStore) } detail: { FolderDetail(folder: selectedFolder, dataStore: dataStore) } } } FolderList struct FolderList: View { @Binding var selectedFolder: Folder? @ObservedObject var dataStore: DataStore var body: some View { List(dataStore.folders, selection: $selectedFolder) { folder in NavigationLink(value: folder) { Text(folder.name) .dropDestination(for: Car.self) { cars, location in print("cars = \(cars) location = \(location)") if let existingCars = dataStore.cars[folder.id] { dataStore.cars[folder.id] = existingCars + cars } else { dataStore.cars[folder.id] = cars } return true } } } } } FolderDetail struct FolderDetail: View { let folder: Folder? @ObservedObject var dataStore: DataStore @State private var selectedCarIDs = Set<Int>() var body: some View { if let folder { List(dataStore.cars[folder.id] ?? [], selection: $selectedCarIDs) { car in Text(car.name) .draggable(car) } } else { Text("no folder selected") } } }

Overview I have 2 models: Deparment and Student Each Department can contain multiple students Each Student can only be in one Department I have DepartmentList, tapping on the department should take it to the StudentList which lists all students in the department Problem When I use Query in StudentList to filter only students for a specific department id, no students are shown. Questions: What should I do to list the students in a department? (see complete code below). let filter = #Predicate<Student> { student in student.department?.id == departmentID } let query = Query(filter: filter, sort: \.name) _students = query Complete code App @main struct SchoolApp: App { var body: some Scene { WindowGroup { ContentView() } .modelContainer(for: [Department.self, Student.self]) } } Department import Foundation import SwiftData @Model class Department { var id: UUID var name: String var students: [Student] init( id: UUID, name: String, students: [Student] = [] ) { self.id = id self.name = name self.students = students } } Student import Foundation import SwiftData @Model class Student { var id: UUID var name: String @Relationship(inverse: \Department.students) var department: Department? init( id: UUID, name: String, department: Department? = nil ) { self.id = id self.name = name self.department = department } } ContentView import SwiftUI struct ContentView: View { @State private var selectedDepartment: Department? var body: some View { NavigationSplitView { DepartmentList(selectedDepartment: $selectedDepartment) } detail: { if let department = selectedDepartment { StudentList(department: department) } else { Text("no department selected") } } .task { printStoreFilePath() } } private func printStoreFilePath() { let urls = FileManager.default.urls(for: .applicationSupportDirectory, in: .userDomainMask) if let path = urls.map({ $0.path(percentEncoded: false) }).first { print("Storage: \(path)") } } } DepartmentList import SwiftUI import SwiftData struct DepartmentList: View { @Binding var selectedDepartment: Department? @Query(sort: \.name) private var departments: [Department] @Environment(\.modelContext) private var modelContext var body: some View { List(selection: $selectedDepartment) { ForEach(departments) { department in NavigationLink(value: department) { Text(department.name) } } } .toolbar { ToolbarItem { Button { addDepartment() } label: { Label("Add", systemImage: "plus") } } } } private func addDepartment() { guard let index = (1000..<10000).randomElement() else { return } let department = Department(id: UUID(), name: "Department \(index)") modelContext.insert(department) } } StudentList import SwiftUI import SwiftData struct StudentList: View { var department: Department @Query private var students: [Student] @Environment(\.modelContext) private var modelContext init(department: Department) { self.department = department let departmentID = department.id let filter = #Predicate<Student> { student in student.department?.id == departmentID } let query = Query(filter: filter, sort: \.name) _students = query } var body: some View { List { ForEach(students) { student in Text(student.name) } } .toolbar { ToolbarItem { Button { addStudent() } label: { Label("Add", systemImage: "plus") } } } } private func addStudent() { guard let index = (1000..<10000).randomElement() else { return } let student = Student( id: UUID(), name: "Student \(index)", department: department ) modelContext.insert(student) } }