“SwiftData inheritance relationship”

I'm in the process of converting one of my apps to SwiftData. I converted the other ones over. This app has a much more involved Schema, but SwiftData seems to handle it well. My issue is when I try to fetch data based on a. #Predicate. Here's my code. let predicate = #Predicate { data in data.result == result && data.variable!.starts(with: SomeString) } let sortBy = [SortDescriptor(.result] let descriptor = FetchDescriptor(predicate: predicate, sortBy: sortBy) if let theData = try? context?.fetch(descriptor) { The if let at the bottom fails. Note that 'variable' is optional while result is not. I have to use ! in the predicate since it's a bool that is returned. If my predicate were just data.result == result, then all is well. I can then check the received data for the second condition in the predicate just fine. It just doesn't work inside of the Predicate. The same is true if I used contains. Anybody else having this issue? I'm using Xcode 15.0 beta 6.

I want to make icloud backup using SwiftData in VisionOS and I need to use SwiftData first but I get the following error even though I do the following steps I followed the steps below I created a Model import Foundation import SwiftData @Model class NoteModel { @Attribute(.unique) var id: UUID var date:Date var title:String var text:String init(id: UUID = UUID(), date: Date, title: String, text: String) { self.id = id self.date = date self.title = title self.text = text } } I added modelContainer WindowGroup(content: { NoteView() }) .modelContainer(for: [NoteModel.self]) And I'm making inserts to test import SwiftUI import SwiftData struct NoteView: View { @Environment(.modelContext) private var context var body: some View { Button(action: { // new Note let note = NoteModel(date: Date(), title: New Note, text: ) context.insert(note) }, label: { Image(systemName: note.text.badge.plus) .font(.system(size: 24)) .frame(width: 30, height: 30) .padding(12) .background( RoundedRe

Perhaps I should not be asking this here, but can anyone recommend a good learning resource/tutorial for a complete beginner for SwiftData and CloudKit?

Hi, I'm using SwiftData in my app, and I want to sent data to iCloud with CloudKit, but I found that If the user turns off my App iCloud sync function in the settings App, the local data will also be deleted. A better way is maintaining the local data, just don't connect to iCloud.How should I do that? I need guidance!!! I'm just getting started with CloudKit And I would be appreciated!

I'm still getting this error (SwiftData/ModelContext.swift:3253: Fatal error: Failed to identify a store that can hold instances of SwiftData._KKMDBackingData from [:]) in Xcode 16.1 Beta (16B5001e). The app works for a limited amount of time and then crashes with this error. It looks like the SwiftData model isn't being created properly and when a context is saved it crashes. Can you tell me if this error will be fixed in the next beta?

I am doing a full transition of an app from CoreData to SwiftData. I was able to follow the online guides and extract SwiftData objects from the CoreData model. Everything seems to work except for my Transformable String Arrays. This app is storing CoreData in iCloud. In my SwiftData model, I have a variable... @Attribute(.transformable(by: NSSecureUnarchiveFromData)) var arrayofStrings: [String]? The app is able to read the array of strings, however, the debugger gives me this error eventually crashing due to memory. 'NSKeyedUnarchiveFromData' should not be used to for un-archiving and will be removed in a future release I don't understand, the transformed variable already is 'NSSecureUnarchiveFromData' not 'NSKeyedUnarchiveFromData'. That's the reason why I used NSSecureUnarchiveFromData in my CoreData model because NSKeyedUnarchiveFromData is being phased out. I don't get why the debugger thinks otherwise. Any thoughts?

I have an app that uses Core Data. I'm switching to SwiftData but it looks like the sqlite files are stored in separate places in the application file directory so my SwiftData files aren't reading the CoreData store. I'm not sure why it's not reading from the same location. Is there something I'm missing? Here's an example of the paths that I see when I write information to the debug console: SwiftData Path: file:///Users/dougthiele/Library/Developer/CoreSimulator/Devices/52CE32F8-F6A9-4825-8027-994DBE47173C/data/Containers/Data/Application/63E9B61D-64B8-4D2D-A02C-3C306688F354/Documents/[Data File Name].sqlite Core Data Path: file:///Users/dougthiele/Library/Developer/CoreSimulator/Devices/52CE32F8-F6A9-4825-8027-994DBE47173C/data/Containers/Data/Application/96A5961B-54DD-43A9-A4C3-661B439D91AE/Documents/[Data File Name].sqlite

I followed along apples Article for relevant store changes, mainly for data deduplication. https://developer.apple.com/documentation/coredata/consuming_relevant_store_changes I also downloaded the Core Data / CloudKit Demo App which already has a deduplication process. https://developer.apple.com/documentation/coredata/synchronizing_a_local_store_to_the_cloud In the Demo project I observed that more often than not, Posts loose their relationship to Tags. After some investigation I assume that this happens, when a Tag which has a relationship to a Post, gets deleted during the deduplication process, before the relevant Post was synced to the device. When the Post now arrives on the device, its related Tag Object does no longer exist. Therefore it's also not possible to find the retained, deduped Tag-Object which should be connected to the Post. I'm wondering why this was implemented that way in the Demo Project, as this really causes critical data loss. I have also no Idea how to avoid it. In