Fails with "to-many key not allowed here" // parent.children?.contains(where: { // $0.name == "Abbiejean" // }) != nil parent.children.flatMap { children in children.contains(where: { $0.name == "Abbijean" }) } == true How are we supposed to query on relationships? This is a huge problem. This is a major limitation blocking migration of CoreData to SwiftData. We can do this with NSPredicate: let moodAnalysis = NSPredicate(format: "ANY moodAnalysis.labels.title == %@", label.description) let stateOfMinds = NSPredicate(format: "SUBQUERY(stateOfMinds, $x, SUBQUERY($x.labels, $y, $y.title == %@).@count > 0).@count > 0", label.description) The accepted answer on stack overflow is: you can't Document says that optionals are allowed in predicates The SwiftData team has made a big show of saying that we can use idiomatic swift for our predicates. But we cannot even filter on relationships when the container is backed by CloudKit... That should be a HUGE warning in the documentation. "For those of you who are considering a costly refactor from CoreData to SwiftData, and are currently using CloudKit, all relationships are mandatory optional arrays, and you can't write predicates on them"

I was taking a look through SwiftData documentation for any changes coming from WWDC 2025 regarding my previous issues that was left unaddressed… KeyPaths are still not provided in Schema.Attribute as it was with Schema.Relationship. I also don’t see an initializer for HistoryTombstone, making it impossible to set up HistoryDelete protocol from what I can gather. I would appreciate a confirmation that we have been provided everything we need to complete the custom store, because I don’t know if everything I need has been provided or if some APIs have not been opened up. Thank you.

I have a SwiftData model that includes a transient image, declared as follows: @Transient var image: UIImage? It appears that SwiftData does not track changes to transient properties and so the following view will not update when the image changes from nil to an actual image. ZStack(alignment: .topTrailing) { if let image = item?.image { Image(uiImage: image) } else { ProgressView() } } Ideally, the SwiftData model would still observe changes in transient properties and just not persist them. As such, other code that works with observable objects would work as otherwise expected.

Im working on an app which have a lot of diffrent models which are having relationships one to many and so on and on macos Sequoia and Sonoma everything is working but on Tahoe i have this error SwiftData/SchemaProperty.swift:286: Fatal error: Illegal attempt to create a property that's a sequence of a non-codable type (_buffer - _ArrayBuffer). Did you mean to use a transformable attribute? I also use computed properties to perform login on model value change like property name is var name: String{ get:{ self._name} set:{ self._name = $0 } } var _name: String = "" I no where use ArrayBuffer i just use [Double] it its needed

I'm trying to migrate over to the Swift 6 language mode, but the biggest issue I'm facing is that any use of SwiftData #Predicate or SortDescriptor results in this warning from the compiler: Type 'ReferenceWritableKeyPath<GuruSchemaV2.Rubric, Bool>' does not conform to the 'Sendable' protocol; this is an error in the Swift 6 language mode Here is an example predicate, from a static method on the Rubric type: static func notArchived() -> Predicate<Rubric> { return #Predicate<Rubric> { rubric in !rubric.archived } } And the error highlights line 5 of the expanded macro: Foundation.Predicate<Rubric>({ rubric in PredicateExpressions.build_Negation( PredicateExpressions.build_KeyPath( root: PredicateExpressions.build_Arg(rubric), keyPath: \.archived ) ) }) What is the correct way to reference properties of a model type using #Predicate?