“SwiftData inheritance relationship”

The generated Obj-C header for Swift is called @property (nonatomic, readonly) NSInteger hash; However, it caused a compiler error: Property type 'NSInteger' (aka 'long') is incompatible with type 'NSUInteger' (aka 'unsigned long') inherited from 'NSObject' Version 15.0 beta (15A5160n)

Hello, I have a List view that populates from a REST API (listApiKeys() calls out to server). The response is decoded and stored in a swiftdata model. It looks like this: NavigationStack(path: $path) { List { ForEach(keys) { key in NavigationLink(value: key) { Text(key.name) } } } .navigationDestination(for: GtApiKey.self) { key in EditApiKeyView(apiKey: key, navigationPath: $path) } .refreshable { try? modelContext.delete(model: GtApiKey.self) await listApiKeys() } .toolbar { Button(Create Key, systemImage: plus, action: createKey) } } .navigationTitle(test apikeys) .task { await listApiKeys() } This all works fine and SwiftData stores everything great. If I click into a single object's edit view, everything works great as well. My question is how do I sync changes to the SwiftData entry back to the server. My edit view uses a @Bindable and any changes auto-sync to SwiftData (expected). But, I can't seem to figure out where to catch those events or prevent them before I ca

Are SwiftData queries lazy loaded when used in conjunction with SwiftUI List? @Query var posts: [PostModel] List { ForEach(posts, id: .id) { post in PostView(post) } } If the code above is not lazy loaded, how can we make it lazy loaded?

I’m using NSPersistentCloudKitContainer and I’m utilising the public database and also the user’s private database. For example I have an entity called Category which has a many-to-many relationship to an entity called NewsArticle. So the NewsArticles exist in the public database for the user to browse, but he can add them to a category which will live in his private database. So that’s my question, is it possible for an entity which exists a in the private database to have a relationship to another entity in a public database?

Hey everyone, I found a possible SwiftData Release-only issue with nested sort descriptors on an optional relationship. In a minimal repro, sorting a @Query by a nested optional relationship key path like: SortDescriptor(InvestigationPhotoAsset.imageAnalysis?.overallAestheticsScore, order: .reverse) works in Debug, but crashes at runtime in Release. The surprising part is that the crash depends on file layout: if the active SwiftData models and the sort logic are kept in the same Swift file, the app works if the same models are split into separate files, the Release build crashes, 'Debug' will also work The repro was reduced to just two SwiftData models: InvestigationPhotoAsset InvestigationImageAnalysis So this looks less like an app-modeling issue and more like a SwiftData/compiler/codegen issue related to nested sort metadata in optimized builds. If useful, I can also give you a slightly more formal version with a title and code snippet block. Please ch

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.inser

Hi everyone, I’m running into a breaking issue with SwiftData automatic CloudKit syncing on iOS 26, and I'm trying to determine if this is a known regression or a new configuration requirement I missed. The Setup: My setup is extremely standard; I am using the default configuration exactly as described in Apple's documentation here: https://developer.apple.com/documentation/swiftdata/syncing-model-data-across-a-persons-devices The schema is very simple: A single @Model class. No relationships. The Issue: Prior to iOS 26, this exact app was successfully syncing data between devices and to iCloud without issues. Immediately after the iOS 26 update, syncing stopped completely. I haven't changed any code, but when I check the CloudKit Console, I am seeing some BAD_REQUEST errors during sync attempts. Since I am using the default SwiftData sync (and not manual CKRecord handling), I’m not sure how my client code could be triggering a bad request unless the schema requirements hav

How do I get Upsert to work in SwiftData? I have a model: @Model class Address: Identifiable { @Attribute(.unique) var id: Int = 0 var number: String = var street: String? var city: String? } When I insert a duplicate record with the same data attributes (specifically overlapping id) and execute modelContext.save() I receive a EXC_BREAKPOINT. let addressA = Address(id: 1, number: 2300, street: E Main St, city: Small Town ); modelContext.insert(addressA) try? modelContext.save() let addressAv2 = Address(id: 1, number: 2300, street: E Main St, city: Small Town ); modelContext.insert(addressAv2) try? modelContext.save() // This fails Is there a better way to handle updates?

My project is using swiftData and I want to implement iCloud sync in it. Now, my data base doesnt have any optional attributes or relationships and CloudKit wants them to be optional. So, rather than editing all code with unwrapping code for the optionals, how can I provide a bridge that does so in the last stage of actually saving to the store? Sort of, capture it in a proxy object before writing and after reading from the store. Is there a neat way that can save a lot of debugging? I have code snippets from chat gpt and they are hard to debug. This is my first project in swiftUI. Thanks. Neerav

Hello Apple Developer Forum, I got the following statement from the AI model. It seems it is also reflecting my real-world experience. Where do I find an official source that fully describes the array on swiftData model behaviour? When a SwiftData model contains an array of value types, such as [String] or [Int], the array's order is preserved

Hi, I have two SwiftData models that are not working as intended. I'm able to add data to the models, but sometimes after refreshing the app data is missing. Any guidance would be greatly appreciated.

I am trying to use the ModelContainer's delete function to delete all instances of a model but I'm getting an error related to my relationships: Constraint trigger violation: Batch delete failed due to mandatory OTO nullify inverse on LeagueSeasonRanking/golfer I do have a relationship on Golfer, a toMany relationship to LeagueSeasonRanking which is marked with a cascade delete rule... I would expect that to take care of things and cascade along but it seems to not work. Is that a bug?