“SwiftData inheritance relationship”

I downloaded X-Code Beta and selected macOS app and swiftData. The template that opens allows you to add items but the delete function built in doesn't seem to work. Has anyone come up with a solution?

Hi, if you have an array of object IDs, with CoreData you can fetch all of the objects for those IDs at once with the right predicate. It would look something like this: let objectIDs: [NSManagedObjectID] = [id1,id2,id3,id4] let predicate = NSPredicate(format: self in %@, objectIDs) Can something similar be created with a SwiftData predicate? For now I fetch all ids one by one and as you might guess, performance wise this is not great.

I wrote this simple app to try to fetch and add data to my airport Database in the background. I'm trying to add some data to the airport table in the background using swift-data, I create a loop that should add and save 100 test airports in a table but when I run the code I only get add 1 airport at the time and the number get add is random, any idea why? How to use swiftData in the background? So far not so many examples. actor JsonImporter: ModelActor { let executor: any ModelExecutor let context: ModelContext init(modelContainer: ModelContainer) { context = ModelContext(modelContainer) executor = DefaultModelExecutor(context: context) } func parseJsonDBAirport() async { for i in 1...100{ print(loop (i)) let airport = Airport(lastPicked: Date(), icao: test (i)) context.insert(airport) do{ try context.save() }catch { print(Error) } } } } Using on the view: struct SettingsView: View { @Environment (.modelContext) var mc var body: some View { Button { Task(priority: .background){ let importer = JsonI

I have two entities, Highlight and Location, that have a one-to-one relationship with each other. Location has just 2 properties, start and end. There is no longer any reason for Highlight and Location to be separate and I would like to just merge it all onto Highlight. Is this possible to do a migration (e.g., mapping model)?

A ModelContainer with two configurations for two seperate models with one set to isStoredInMemoryOnly:false and the other one isStoredInMemoryOnly:true crashes after insertion. Anyone git this to work? import SwiftData @main struct RecipeBookApp: App { var container: ModelContainer init() { do { let config1 = ModelConfiguration(for: Recipe.self) let config2 = ModelConfiguration(for: Comment.self, isStoredInMemoryOnly: true) container = try ModelContainer(for: Recipe.self, Comment.self, configurations: config1, config2) } catch { fatalError(Failed to configure SwiftData container.) } } var body: some Scene { WindowGroup { ContentView() .modelContainer(container) } } } struct ContentView: View { @Environment(.modelContext) private var context @Query private var recipes: [Recipe] @Query private var comments: [Comment] var body: some View { VStack { Button(Insert) { context.insert(Recipe(name:Test)) context.insert(Comment(name:Test)) } List(recipes){ recipe in Text(recipe.name) } List(comments){

I made simple school & student model with RelationShip import SwiftUI import SwiftData @Model final class School { var name: String @Relationship(deleteRule: .cascade, inverse: Student.school) var studentList: [Student] = [Student]() init(name: String) { self.name = name } } @Model final class Student { var name: String var school: School? init(name: String) { self.name = name } } ~ struct SchoolView: View { @Environment(.modelContext) private var modelContext @Query(sort: School.name) var schools: [School] @Query(sort: Student.name) var students: [Student] var body: some View { NavigationStack { List { ForEach(schools) { school in NavigationLink { StudentView(school: school) } label: { HStack { Text(school.name) Spacer() Text((school.studentList.count)) } } .swipeActions { Button(role: .destructive) { deleteSchool(school) } label: { Label(Delete, systemImage: trash) } } } .onDelete(perform: deleteSchools(at:)) } .navigationTitle(Home) .listStyle(.plain) .toolbar { ToolbarItem(p

In SwiftData, what is the order of insertion for dependent and parent instances? In the snippet below, it works when the dependent instance is inserted before the parent. However, it fails when the order is reversed. Why is this the case? // // DebugView.swift // gogodict // // Created by djzhu on 2024/1/13. // import Foundation import SwiftData import SwiftUI struct DebugView: View { @Query var parent: [ParentClass] @Query var dept: [DependentClass] var body: some View { Text(parent cnt:(parent.count), dept cnt:(dept.count)) } } @Model class ParentClass { @Relationship(deleteRule: .cascade) var deps: DependentClass init(deps: DependentClass) { self.deps = deps } } @Model class DependentClass { var id: String init(id: String = UUID().uuidString) { self.id = id } } #Preview { do { let config = ModelConfiguration(isStoredInMemoryOnly: true) let container = try ModelContainer(for: ParentClass.self, configurations: config) let context = ModelContext(container) var dept = DependentClass(

I followed these two resources and setup history tracking in SwiftData. SwiftData History tracking: Track model changes with SwiftData history For data deduplication: Sharing Core Data objects between iCloud users In the sample app (CoreDataCloudKitShare), a uuid: UUID field is used for deduplication logic. It sorts the entities by their uuids, reserves the first one, and marks the others as deduplicated. Would it be a viable solution to use a createdAt: Date field for the sort operation instead of a uuid field, or are dates inherently problematic?

My database has over 100k entries and anytime I access it either via @Query or a custom Fetch request it freezes my apps UI for 10+ second. My first question is anyone having performance issues with large data sets. If so how have you found to resolve it ? My next question is does swiftUI load the entire database into memory with the @Query. As I feel it is seeing as my app becomes very slow and partially unresponsive. lastly if I have 2 data models and 1 has a to many relationship to the other are both loaded into memory even though only @Query 1? consider datamodels model1 { var name : String @Relationship(deleteRule:.cascade) var lotsOfData :[LotsOfData] init.... } LotsOfData{ var element1 : String var element2 : String var element3 : String var element4 : String var element4 : String init …. } LotsOfData has 100K instances in the database. if I @Query into model1 because it references LotsOfData through A relationship is all that data all called / loaded ? thanks for the informa

How can I connect multiple identities with no common sharing fields between them into one object? Also what would be the relationship between these identities? Do I need to add a field called ID for each like CUSTID or ShopID or whatever to my struct that I built? Also I want to put them all in separate array obj for example customer struct with its properties will be stored in customer = [Customer] () How do I store and access them from a custom cell with label and textfield in a tableviewcontroller so that they all attach together as one object with shop and with techninfo shopinfo and with inspectionitems. I am a new programmer trying to do my project on my own and my concept need some clarification so I can move forward with it and get this app done. Please help if you can ...any help will be 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?