“SwiftData inheritance relationship”

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.

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

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

I cannot test at the moment, but have not found documentation on this yet. I don't have a sense of how ModelContainer works across targets. I have not, for example, seen a project with SwiftData unit tests yet.

I'm getting SwiftData/SchemaProperty.swift:369: Fatal error: Unexpected type for CompositeAttribute CLLocationCoordinate2D in the following situation - this is simplified, but demonstrates the issue. There are a lot of posts discussing Measurements running into the same issue, and the recommended fix is to turn the Measurement (or CLLocationCoordinate2D in this example) into a computed property and generate it on the fly. I'm trying to cache instances of CLLocationCoordinate2D, rather than creating new ones every time a View renders, so those work arounds don't work around. The SwiftData docs seem to indicate that this should be possible. Can anyone recommend a fix? Thanks in advance. import SwiftData import MapKit @Model final class foo : Codable { var bar: SomeStruct init( bar: SomeStruct ) { self.bar = bar } enum CodingKeys : CodingKey { case bar } init(from decoder: Decoder) throws { let container = try decoder.container(keyedBy: CodingKeys.self) self.bar = try container.decode(

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?

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 did manage to save my Entities to CloudKit with SwiftData but the default database is the private database. I need to store some Entities in the private and other Entities in the public CloudKit database. How do I manage that with SwiftData? With CoreData I always used different configurations for both private and public and added the entities to one or the other.

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