In a document based SwiftData app for macOS, how do you go about opening a (modal) child window connected to the ModelContainer of the currently open document?
Using .sheet() does not really result in a good UX, as the appearing view lacks the standard window toolbar.
Using a separate WindowGroup with an argument would achieve the desired UX. However, as WindowGroup arguments need to be Hashable and Codable, there is no way to pass a ModelContainer or a ModelContext there:
WindowGroup(id: "myWindowGroup", for: MyWindowGroupArguments.self) { $args in
ViewThatOpensInAWindow(args: args)
}
Is there any other way?
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SwiftData crashes 100% when fetching history of a model that contains an optional codable property that's updated:
SwiftData/Schema.swift:389: Fatal error: Failed to materialize a keypath for someCodableID.someID from CrashModel. It is possible that this path traverses a type that does not work with append(), please file a bug report with a test.
Would really appreciate some help or even a workaround.
Code:
import Foundation
import SwiftData
import Testing
struct VaultsSwiftDataKnownIssuesTests {
@Test
func testCodableCrashInHistoryFetch() async throws {
let container = try ModelContainer(
for: CrashModel.self,
configurations: .init(
isStoredInMemoryOnly: true
)
)
let context = ModelContext(container)
try SimpleHistoryChecker.hasLocalHistoryChanges(context: context)
// 1: insert a new value and save
let model = CrashModel()
model.someCodableID = SomeCodableID(someID: "testid1")
context.insert(model)
try context.save()
// 2: check history it's fine.
try SimpleHistoryChecker.hasLocalHistoryChanges(context: context)
// 3: update the inserted value before then save
model.someCodableID = SomeCodableID(someID: "testid2")
try context.save()
// The next check will always crash on fetchHistory with this error:
/*
SwiftData/Schema.swift:389: Fatal error: Failed to materialize a keypath for someCodableID.someID from CrashModel. It is possible that this path traverses a type that does not work with append(), please file a bug report with a test.
*/
try SimpleHistoryChecker.hasLocalHistoryChanges(context: context)
}
}
@Model final class CrashModel {
// optional codable crashes.
var someCodableID: SomeCodableID?
// these actually work:
//var someCodableID: SomeCodableID
//var someCodableID: [SomeCodableID]
init() {}
}
public struct SomeCodableID: Codable {
public let someID: String
}
final class SimpleHistoryChecker {
static func hasLocalHistoryChanges(context: ModelContext) throws {
let descriptor = HistoryDescriptor<DefaultHistoryTransaction>()
let history = try context.fetchHistory(descriptor)
guard let last = history.last else {
return
}
print(last)
}
}
After copying and inserting instances I am getting strange duplicate values in arrays before saving.
My models:
@Model
class Car: Identifiable {
@Attribute(.unique)
var name: String
var carData: CarData
func copy() -> Car {
Car(
name: "temporaryNewName",
carData: carData
)
}
}
@Model
class CarData: Identifiable {
var id: UUID = UUID()
var featuresA: [Feature]
var featuresB: [Feature]
func copy() -> CarData {
CarData(
id: UUID(),
featuresA: featuresA,
featuresB: featuresB
)
}
}
@Model
class Feature: Identifiable {
@Attribute(.unique)
var id: Int
@Attribute(.unique)
var name: String
@Relationship(
deleteRule:.cascade,
inverse: \CarData.featuresA
)
private(set) var carDatasA: [CarData]?
@Relationship(
deleteRule:.cascade,
inverse: \CarData.featuresB
)
private(set) var carDatasB: [CarData]?
}
The Car instances are created and saved to SwiftData, after that in code:
var fetchDescriptor = FetchDescriptor<Car>(
predicate: #Predicate<Car> {
car in
car.name == name
}
)
let cars = try! modelContext.fetch(
fetchDescriptor
)
let car = cars.first!
print("car featuresA:", car.featuresA.map{$0.name}) //prints ["green"] - expected
let newCar = car.copy()
newCar.name = "Another car"
newcar.carData = car.carData.copy()
print("newCar featuresA:", newCar.featuresA.map{$0.name}) //prints ["green"] - expected
modelContext.insert(newCar)
print("newCar featuresA:", newCar.featuresA.map{$0.name}) //prints ["green", "green"] - UNEXPECTED!
/*some code planned here modifying newCar.featuresA, but they are wrong here causing issues,
for example finding first expected green value and removing it will still keep the unexpected duplicate
(unless iterating over all arrays to delete all unexpected duplicates - not optimal and sloooooow).*/
try! modelContext.save()
print("newCar featuresA:", newCar.featuresA.map{$0.name}) //prints ["green"] - self-auto-healed???
Tested on iOS 18.2 simulator and iOS 18.3.1 device. Minimum deployment target: iOS 17.4
The business logic is that new instances need to be created by copying and modifying previously created ones, but I would like to avoid saving before all instances are created, because saving after creating each instance separately takes too much time overall. (In real life scenario there are more than 10K objects with much more properties, updating just ~10 instances with saving takes around 1 minute on iPhone 16 Pro.)
Is this a bug, or how can I modify the code (without workarounds like deleting duplicate values) to not get duplicate values between insert() and save()?
Hello,
I tried to validate if my app was properly syncing to the cloud. To test this, I created some data in the app, and then deleted the app, and reinstalled. I was expecting the data to still exist but it isn't. Is this a valid test or is the data expected to be deleted when app is deleted?
Topic:
App & System Services
SubTopic:
iCloud & Data
Hello,
I am building a pretty large database (~40MB) to be used in my SwiftData iOS app as read-only.
While inserting and updating the data, I noticed a substantial increase in size (+ ~10MB).
A little digging pointed to ACHANGE and ATRANSACTION tables that apparently are dealing with Persistent History Tracking.
While I do appreciate the benefits of that, I prefer to save space.
Could you please point me in the right direction?
We have an unreleased SwiftData app for iOS18+. While we were testing I saw reports on the forum about unexpected database migrations for codable arrays on iOS26.1.
I'd like to ask a couple of questions:
1- Does this issue originate from the new Xcode version, or is it specific to iOS 26.1?
2- Is it possible to change our attribute so that users on older iOS versions receive the same model, preventing a migration from being triggered when they upgrade to iOS 26.1?
One of our models looks like this:
struct Point: Codable, Hashable {
let x: Int
let y: Int
}
@Model
class Grid {
private(set) var gridId: String = ""
var points: [Point] = []
var updatedAt: Date = Date()
private(set) var createdAt: Date = Date()
#Index<Grid>([\.gridId])
...
}
I can think of some options like:
// 1
@Attribute(.transformable(by: CustomJsonTransformer.self)) var points: [Point] = []
// 2
@Attribute(.externalStorage) var points: [Point] = []
// 3
var points: Data = Data() // store points as data
However, I'm not sure which one to use.
What would you recommend to handle this, or is there a better strategy you would suggest?
Hello everyone,
I am experiencing a persistent authentication error when querying a custom user profile record, and the error message seems to be a red herring.
My Setup:
I have a custom CKRecord type called ColaboradorProfile.
When a new user signs up, I create this record and store their hashed password, salt, nickname, and a custom field called loginIdentifier (which is just their lowercase username).
In the CloudKit Dashboard, I have manually added an index for loginIdentifier and set it to Queryable and Searchable. I have deployed this schema to Production.
The Problem:
During login, I run an async function to find the user's profile using this indexed loginIdentifier.
Here is the relevant authentication code:
func autenticar() async {
// ... setup code (isLoading, etc.)
let lowercasedUsername = username.lowercased()
// My predicate ONLY filters on 'loginIdentifier'
let predicate = NSPredicate(format: "loginIdentifier == %@", lowercasedUsername)
let query = CKQuery(recordType: "ColaboradorProfile", predicate: predicate)
// I only need these specific keys
let desiredKeys = ["password", "passwordSalt", "nickname", "isAdmin", "isSubAdmin", "username"]
let database = CKContainer.default().publicCloudDatabase
do {
// This is the line that throws the error
let result = try await database.records(matching: query, desiredKeys: desiredKeys, resultsLimit: 1)
// ... (rest of the password verification logic)
} catch {
// The error always lands here
logDebug("Error authenticating with CloudKit: \(error.localizedDescription)")
await MainActor.run {
self.errorMessage = "Connection Error: \(error.localizedDescription)"
self.isLoading = false
self.showAlert = true
}
}
}
The Error:
Even though my query predicate only references loginIdentifier, the catch block consistently reports this error:
Error authenticating with CloudKit: Field 'createdBy' is not marked queryable.
I know createdBy (the system creatorUserRecordID) is not queryable by default, but my query isn't touching that field. I already tried indexing createdBy just in case, but the error persists. It seems CloudKit cannot find or use my index for loginIdentifier and is incorrectly reporting a fallback error related to a system field.
Has anyone seen this behavior? Why would CloudKit report an error about createdBy when the query is explicitly on an indexed, custom field?
I'm new to Swift and I'm struggling quite a bit.
Thank you,
I've run into a strange issue.
If a sheet loads a view that has a SwiftData @Query, and there is an if statement in the view body, I get the following error when running an iOS targetted SwiftUI app under MacOS 26.1:
Set a .modelContext in view's environment to use Query
While the view actually ends up loading the correct data, before it does, it ends up re-creating the sqlite store (opening as /dev/null).
The strange thing is that this only happens if there is an if statement in the body. The statement need not ever evaluate true, but it causes the issue.
Here's an example. It's based on the default xcode new iOS project w/ SwiftData:
struct ContentView: View {
@State private var isShowingSheet = false
var body: some View {
Button(action: { isShowingSheet.toggle() }) {
Text("Show Sheet")
}
.sheet(isPresented: $isShowingSheet, onDismiss: didDismiss) {
VStack {
ContentSheetView()
}
}
}
func didDismiss() { }
}
struct ContentSheetView: View {
@Environment(\.modelContext) private var modelContext
@Query public var items: [Item]
@State var fault: Bool = false
var body: some View {
VStack {
if fault { Text("Fault!") }
Button(action: addItem) {
Label("Add Item", systemImage: "plus")
}
List {
ForEach(items) { item in
Text(item.timestamp, format: Date.FormatStyle(date: .numeric, time: .standard))
}
}
}
}
private func addItem() {
withAnimation {
let newItem = Item(timestamp: Date())
modelContext.insert(newItem)
}
}
}
It requires some data to be added to trigger, but after adding it and dismissing the sheet, opening up the sheet with trigger the Set a .modelContext in view's environment to use Query. Flipping on -com.apple.CoreData.SQLDebug 1 will show it trying to recreate the database.
If you remove the if fault { Text("Fault!") } line, it goes away. It also doesn't appear to happen on iPhones or in the iPhone simulator.
Explicitly passing modelContext to the ContentSheetView like ContentSheetView().modelContext(modelContext) also seems to fix it.
Is this behavior expected?
I am implementing a custom migration, and facing an issue while implementing a WAL checkpointing.
Here is the code for WAL checkpointing
func forceWALCheckpointingForStore(at storeURL: URL, model: NSManagedObjectModel) throws {
let persistentStoreCoordinator = NSPersistentStoreCoordinator(managedObjectModel: model)
let options = [NSSQLitePragmasOption: ["journal_mode": "DELETE"]]
let store = try persistentStoreCoordinator.addPersistentStore(type: .sqlite, at: storeURL, options: options)
try persistentStoreCoordinator.remove(store)
}
When the coordinator tries to add the store I am getting the following error
fault: Store opened without NSPersistentHistoryTrackingKey but previously had been opened with NSPersistentHistoryTrackingKey - Forcing into Read Only mode store
My questions are
Is it really necessary to force WAL checkpointing before migration? I am expecting NSMigrationManager to handle it internally. I am assuming this because the migrateStore function asks for the sourceType where I am passing StoreType.sqlite
If checkpointing is required, then how do I address the original issue
Note:
Since my app supports macOS 13, I am not able to use the newly introduced Staged migrations.
There is similar question on Stackoverflow that remains unanswered. https://stackoverflow.com/q/69131577/1311902
Hi everyone
I would like to achieve having unidirectional relationships in my SwiftData project (which I believe is possible: https://developer.apple.com/documentation/updates/swiftdata?changes=_9) but I'm afraid I'm struggling to overcome the errors I'm experiencing.
For example, I have the following models:
@Model
final class Quota {
@Attribute(.unique) var id: UUID
var allowance: Int
@Relationship(inverse: nil) var fish: Fish
init(id: UUID = UUID(), fish: Fish, allowance: Int) {
self.id = id
self.fish = fish
self.allowance = allowance
}
}
@Model
final class Fish {
@Attribute(.unique) var id: Int
var name: String
init(id: Int, name: String) {
self.id = id,
self.name = name
}
}
However, when I attempt to save a quota as so:
let quota: Quota = .init(fish: Fish(id: 2, name: "Salmon"), allowance: 50)
modelContext?.insert(quota)
try save()
I keep getting the following error:
SwiftData.DefaultStore save failed with error: Error Domain=NSCocoaErrorDomain Code=1570 "%{PROPERTY}@ is a required value." UserInfo={NSValidationErrorObject=<NSManagedObject: 0x600002217390> (entity: Fish; id: 0x83319d001151328d <x-coredata://C76A2A64-146E-432F-A565-319B5A2F23F5/Fish/p12>; data: { id = nil; }), NSLocalizedDescription=%{PROPERTY}@ is a required value., NSValidationErrorKey=id, NSValidationErrorValue=null} %{PROPERTY}@ is a required value.
However, if I set up Quota and Fish with an inverse relationship then the data saves as expected, so I'm a little confused. Is there anyone out there who can provide some guidance as to why I'm seeing this error when I try to save a record in SwiftData with no inverse relationship?
I do fully understand about unidirectional vs bidirectional relationships but I have a scenario where I need the relationship to be unidirectional. Also, as a side note, the Fish record already exists in my database, but if I delete it and try to save the record I still see this error.
Thank you so much in advance for any help.
Trying to support undo & redo in an app that utilizes Swift Data and as with anything other than provided simplistic Apple demo examples the experience is not great.
The problem:
Im trying to build functionality that allows users to add items to an item group, where item and item group have a many-to-many relationship e.g. item group can hold many items and items can appear in multiple groups.
When trying to do so with relatively simple setup of either adding or removing item group from items relationship array, I am pretty consistently met with a hard crash after performing undo & redo. Sometimes it works the first few undo & redos but 95% of the time would crash on the first one.
Could not cast value of type 'Swift.Optional<Any>' (0x20a676be0) to 'Swift.Array<App.CodableStructModel>' (0x207a2bc08).
Where CodableStructModel is a Codable Value type inside Item.
Adding and removing this relationship should be undoable & redoable as typical for Mac interaction and is "supported" by SwiftData by default, meaning that the developer has to actively either wholly opt out of undo support in their modelContainer setup or do it on a per action scale with the only thing I know of:
modelContext.processPendingChanges()
modelContext.undoManager?.disableUndoRegistration()
.....
modelContext.processPendingChanges()
modelContext.undoManager?.enableUndoRegistration()
General rant on SwiftData:
Random crashes, inconsistencies, random cryptic errors thrown by the debugger and general lack of production level stability.
Each update breaks something new and there is very little guidance and communication from the Swift Data team on how to adapt and more importantly consideration for developers that have adopted Swift Data.
If SwiftData is not ready for production, it would go a long way to clearly communicate that and mark it as Beta product.
I want to get to a point where I can use a small view with a query for my SwiftData model like this:
@Query
private var currentTrainingCycle: [TrainingCycle]
init(/*currentDate: Date*/) {
_currentTrainingCycle = Query(filter: #Predicate<TrainingCycle> {
$0.numberOfDays > 0
// $0.startDate < currentDate && currentDate < $0.endDate
}, sort: \.startDate)
}
The commented code is where I want to go. In this instance, it'd be created as a lazy var in a viewModel to have it stable (and not constantly re-creating the view). Since it was not working, I thought I could check the same view with a query that does not require any dynamic input. In this case, the numberOfDays never changes after instantiation.
But still, each time the app tries to create this view, the app becomes unresponsive, the CPU usage goes at 196%, memory goes way high and the device heats up quickly.
Am I holding it wrong? How can I have a dynamic predicate on a View in SwiftUI with SwiftData?
Hello, thank you Apple for supporting custom store with SwiftData and the Schema type is superb to work with. I have successfully set one up with SQL and have some feedback and issues regarding its APIs.
There’s a highlighted message in the documentation about not using internal restricted symbols directly, but they contradict with the given protocols and I am concerned about breaking any App Store rules. Are we allowed to use these? If not, they should be opened up as they’re useful.
BackingData is required to set up custom snapshots, initialization, and getting/setting values. And I want to use it with createBackingData() to directly initialize instances from snapshots when transferring them between server and client or concurrency.
RelationshipCollection for casting to-many relationships from backing data or checking if an array contains a PersistentModel.
SchemaProperty for type erasure in a collection.
Schema.Relationship has KeyPath properties, but it is missing for Schema.Attribute and Schema.CompositeAttribute. Which means you can’t purely depend on the schema to map data. I am unable to access the properties of a custom struct type in a predicate unless I use Mirror with schemaMetadata() or CustomStringConvertible on the KeyPath directly to extract it.
Trivial, but… the KeyPath property name is inconsistent (it’s all lowercase).
It would be nice to retrieve property names from custom struct types, since you are unable access CodingKeys that are auto synthesized by Codable for structs. But I recently realized they’re a part Schema.CompositeAttribute, however I don’t know how to match these without the KeyPath…
I currently map my entities using CodingKeys to their PredicateCodableKeyPathProviding.… but I wish for a simpler alternative!
It’s unclear how to provide the schema to the snapshot before new models are created.
I currently use a static property, but I want to make it flexible if more schemas and configurations are added later on.
I considered saving and loading the schema in a temporary location, but doubtful that the KeyPath values will be available as they are not Codable.
I suspect schemaMetadata() has the information I need to map the backing data without a schema for snapshots, but as mentioned previously, properties are inaccessible…
Allow access to entity metatypes, like value types from SchemaProperty. They’re useful for getting data out of snapshots and casting them to CodingKeys and PredicateCodableKeyPathProviding. They do not carry over when you provide them in the Schema.
I am unable to retrieve the primary key from PersistentIdentifier.
It seems like once you create one, you can’t get it out, like the DataStoreConfiguration in ModelContainer is not the one you used to set it up. I cannot cast it, it is an entirely different struct?
I have to use JSONSerialization to extract it, but I want to get it directly since it is not a column in my database. It is transformed when it goes to/from my tables.
It’s unknown how to support some schema options, such as Spotlight and CloudKit.
Allow for extending macro options, such as adding options to set as primary key, whether to auto increment, etc…
You can create a schema for super and sub entities, but it doesn’t appear you can actually set them up from the @Model macro or use inheritance on these models…
SwiftData history tracking seems incomplete for HistoryDelete, because that protocol requires HistoryTombstone, but this type cannot be instantiated, nor does it contain anything useful to infer from.
As an aside, I want to create my own custom ModelActor that is a global actor. However, I’m unable to replicate the executor that Apple provides where the executor has a ModelContext, because this type does not conform to Sendable. So how did Apple do this? The documentation doesn’t mention unchecked Sendable, but I figure if the protocol is available then we would be able to set up our own.
And please add concurrency features!
Anyway, I hope for more continued support in the future and I am looking forward to what’s new this WWDC! 😊
Background:
Our non-production App was using SwiftData locally. Yesterday we followed the documentation to enable CloudKit: https://developer.apple.com/documentation/cloudkit/enabling-cloudkit-in-your-app
iCloud Works: Data is properly syncing via iCloud between 2 devices. Add on one shows on the other; delete on one deletes on the other.
Today we logged into CloudKit Console for the first time; but there are no databases showing.
We verified:
Users and Roles: we have “Access to Cloud Managed… Certificates”
Certificates, Identifiers & Profiles: our app has iCloud capabilities and is using our iCloud Container
Signed into CloudKit Console with same developer ID as AppStoreConnect
This is also the Apple ID of the iCloud account that has synced data from our app.
In Xcode > Signing & Capabilities we are signed in as our Company team.
Any guidance or tips to understanding how to what’s going on in CloudKit Console and gaining access to the database is appreciated!
Topic:
App & System Services
SubTopic:
iCloud & Data
Tags:
CloudKit
CloudKit Dashboard
CloudKit Console
Is there a way to move user data from UserDefaults to SwiftData when the app is in production so that people don’t lose their data. Currently my audio journals in my journal app has everything in the UserDefaults. Now this is bad for obvious reasons but I was thinking if there was a way. It’s only been 1 week since published and I have already had17 people download it.
I have used core data before via the model editor. This is the first time I'm using swift data and that too with CloudKit. Can you tell me if the following model classes are correct?
I have an expense which can have only one sub category which in turn belongs to a single category. Here are my classes...
// Expense.swift
// Pocket Expense Diary
//
// Created by Neerav Kothari on 16/05/25.
//
import Foundation
import SwiftData
@Model
class Expense {
@Attribute var expenseDate: Date? = nil
@Attribute var expenseAmount: Double? = nil
@Attribute var expenseCategory: Category? = nil
@Attribute var expenseSubCategory: SubCategory? = nil
var date: Date {
get {
return expenseDate ?? Date()
}
set {
expenseDate = newValue
}
}
var amount: Double{
get {
return expenseAmount ?? 0.0
}
set {
expenseAmount = newValue
}
}
var category: Category{
get {
return expenseCategory ?? Category.init(name: "", icon: "")
}
set {
expenseCategory = newValue
}
}
var subCategory: SubCategory{
get {
return expenseSubCategory ?? SubCategory.init(name: "", icon: "")
}
set {
expenseSubCategory = newValue
}
}
init(date: Date, amount: Double, category: Category, subCategory: SubCategory) {
self.date = date
self.amount = amount
self.category = category
self.subCategory = subCategory
}
}
//
// Category.swift
// Pocket Expense Diary
//
// Created by Neerav Kothari on 16/05/25.
//
import Foundation
import SwiftData
@Model
class Category {
@Attribute var categoryName: String? = nil
@Attribute var categoryIcon: String? = nil
var name: String {
get {
return categoryName ?? ""
}
set {
categoryName = newValue
}
}
var icon: String {
get {
return categoryIcon ?? ""
}
set {
categoryIcon = newValue
}
}
@Relationship(inverse: \Expense.expenseCategory) var expenses: [Expense]? = []
init(name: String, icon: String) {
self.name = name
self.icon = icon
}
}
// SubCategory.swift
// Pocket Expense Diary
//
// Created by Neerav Kothari on 16/05/25.
//
import Foundation
import SwiftData
@Model
class SubCategory {
@Attribute var subCategoryName: String? = nil
@Attribute var subCategoryIcon: String? = nil
var name: String {
get {
return subCategoryName ?? ""
}
set {
subCategoryName = newValue
}
}
var icon: String {
get {
return subCategoryIcon ?? ""
}
set {
subCategoryIcon = newValue
}
}
@Relationship(inverse: \Expense.expenseSubCategory) var expenses: [Expense]? = []
init(name: String, icon: String) {
self.name = name
self.icon = icon
}
}
The reason why I have wrappers is the let the existing code (before CloudKit was integrated), work.
In future versions I plan to query expenses even via category or sub category. I particularly doubt for the relationship i have set. should there be one from category to subcategory as well?
I have an app that uses NSPersistentCloudKitContainer stored in a shared location via App Groups so my widget can fetch data to display. It works. But if you reset your iPhone and restore it from a backup, an error occurs:
The file "Name.sqlite" couldn't be opened. I suspect this happens because the widget is created before the app's data is restored. Restarting the iPhone is the only way to fix it though, opening the app and reloading timelines does not. Anything I can do to fix that to not require turning it off and on again?
The CloudKit Console includes a Unique Users table in the Usage section.
The numbers here are lower than what I would expect. Does this only track a certain percentage of users, e.g. users have opted in to share analytics with developers?
Hi Developer Community,
I'm experiencing a critical issue with CloudKit schema deployment that's blocking my app release. I've been trying to resolve this for several days and would appreciate any assistance from the community or Apple engineers.
Issue Description
I'm unable to deploy my CloudKit schema from development to production environment. When attempting to deploy through the CloudKit Dashboard, I either get an "Internal Error" message or the deployment button is disabled.
Environment Details
App: Reef Trak (Reef aquarium tracking app)
CloudKit Container: ************
Development Environment: Schema fully defined and working correctly
Production Environment: No schema deployed (confirmed in dashboard)
What I've Tried
Using the "Deploy Schema to Production" button in CloudKit Dashboard (results in "Internal Error")
Exporting schema from development and importing to production (fails)
Using CloudKit CLI tools with API token (results in "invalid-scope" errors)
Waiting 24-48 hours between attempts in case of propagation delays
Current Status
App works perfectly in development environment (when run from Xcode)
In TestFlight/sideloaded builds (production environment), the app attempts to fetch records but fails with "Did not find record type: Tank" errors
Log snippet showing the issue:
[2025-03-21] [CloudKit] Schema creation failed: Error saving record <CKRecordID: 0x******; recordName=SchemaSetup_Tank_-**---****, zoneID=_defaultZone:defaultOwner> to server: Cannot create new type Tank in production schema [2025-03-21] [CloudKit] Failed to create schema for Tank after 3 attempts [2025-03-21] [CloudKit] Error creating schema for Tank: Error saving record <CKRecordID: 0x****; recordName=SchemaSetup_Tank_---**-**********, zoneID=_defaultZone:defaultOwner> to server: Cannot create new type Tank in production schema
App Architecture & Critical Impact
My app "Reef Trak" is built around a core data model where the "Tank" entity serves as the foundational element of the entire application architecture. The Tank entity is not just another data type - it's the primary container that establishes the hierarchical relationship for all other entities:
All parameter measurements (pH, temperature, salinity, etc.) are associated with specific tanks
All maintenance tasks and schedules are tank-specific
All livestock (fish, corals, invertebrates) exist within the context of a tank
All user achievements and progress tracking depend on tank-related activities
Without the Tank schema being properly deployed to production, users experience what appears to be a completely empty application, despite successful authentication and CloudKit connection. The app shows "Successfully retrieved iCloud data" but displays no content because:
The Tank record type doesn't exist in production
Without Tanks, all child entities (even if their schemas existed) have no parent to associate with
This creates a cascading failure where no data can be displayed or saved
This issue effectively renders the entire application non-functional in production, despite working flawlessly in development. Users are left with an empty shell of an app that cannot fulfill its core purpose of reef tank management and monitoring.
The inability to deploy the Tank schema to production is therefore not just a minor inconvenience but a complete blocker for the app's release and functionality.
Questions
Is there an alternative method to deploy schema to production that I'm missing?
Could there be an issue with my account permissions or container configuration?
Are there known issues with the CloudKit Dashboard deployment functionality?
What's the recommended approach when the dashboard deployment fails?
I've also submitted a Technical Support Incident, but I'm hoping to get this resolved quickly as it's blocking my App Store release.
Thank you for any assistance!
Topic:
App & System Services
SubTopic:
iCloud & Data
Tags:
CloudKit
CloudKit Dashboard
CloudKit Console
cktool
When I try to use an entity created in a CoreData, it gives me: 'PlayerData' is ambiguous for type lookup in this context