Like the title says, I've realised that when I try to use filter or sort on properties that aren't standard supported data types i.e. Using a transformable or a value type like an enum, I seem to be getting the following crash...
SwiftData/DataUtilities.swift:1140: Fatal error: Unexpected type for Expansion: Optional<UIColor>
Xcode expands and shows me when trying to access the wrapped value it's crashing. I'm assumung that the query property wrapper can't handle these custom data types
@Query private var items: [Item]
{
get {
_items.wrappedValue <--- Crash here
}
}
Which seems to be pointing to a transferable property in one of my models. Below are my two models i'm using.
enum Priority: Int, Codable, Identifiable, CaseIterable {
case low
case medium
case high
var title: String {
switch self {
case .low:
return "Low"
case .medium:
return "Medium"
case .high:
return "High"
}
}
var image: Image? {
switch self {
case .medium:
return Image(systemName: "exclamationmark.2")
case .high:
return Image(systemName: "exclamationmark.3")
default:
return nil
}
}
var id: Self { self }
}
@Model
final class Item: Codable {
var title: String
@Attribute(originalName: "timestamp")
var dueDate: Date
var isCompleted: Bool
var isFlagged: Bool = false
var isArchived: Bool = false
var isCritical: Bool?
var priority: Priority?
@Relationship(deleteRule: .nullify, inverse: \Category.items)
var category: Category?
@Attribute(.externalStorage)
var image: Data?
enum CodingKeys: String, CodingKey {
case title
case timestamp
case isCritical
case isCompleted
case category
case imageName
}
init(title: String = "",
dueDate: Date = .now,
priority: Priority? = nil,
isCompleted: Bool = false) {
self.title = title
self.dueDate = dueDate
self.priority = priority
self.isCompleted = isCompleted
}
init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CodingKeys.self)
self.title = try container.decode(String.self, forKey: .title)
self.dueDate = Date.randomDateNextWeek() ?? .now
self.isCompleted = try container.decode(Bool.self, forKey: .isCompleted)
self.category = try container.decodeIfPresent(Category.self, forKey: .category)
if let imageName = try container.decodeIfPresent(String.self, forKey: .imageName),
let imageData = UIImage(named: imageName) {
self.image = imageData.jpegData(compressionQuality: 0.8)
}
if let isCritical = try container.decodeIfPresent(Bool.self, forKey: .isCritical),
isCritical == true {
self.priority = .high
}
}
func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
try container.encode(title, forKey: .title)
try container.encode(dueDate, forKey: .timestamp)
try container.encode(isCompleted, forKey: .isCompleted)
try container.encode(category, forKey: .category)
}
}
@Model
class Category: Codable {
@Attribute(.unique)
var title: String
var items: [Item]?
@Attribute(.transformable(by: ColorValueTransformer.self))
var color: UIColor?
init(title: String = "",
color: UIColor) {
self.title = title
self.color = color
}
enum CodingKeys: String, CodingKey {
case title
}
required init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CodingKeys.self)
self.title = try container.decode(String.self, forKey: .title)
self.color = UIColor(possibleColors.randomElement()!)
}
func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
try container.encode(title, forKey: .title)
}
}
And below is an example of me sorting based on my enum (Priority) & Relationship (Category name)
func sort() -> [SortDescriptor<Item>]{
switch self {
case .title:
[SortDescriptor(\Item.title)]
case .date:
[SortDescriptor(\Item.dueDate)]
case .category:
[SortDescriptor(\Item.category?.title)]
case .priority:
[SortDescriptor(\Item.priority?.rawValue)]
}
}
And a filter example below creating a predicate that we will execute to return and matches found in the title or category title
let highPriority = Priority.high
if let query {
return #Predicate {
$0.priority == highPriority &&
($0.title.contains(query) || $0.category?.title.contains(query) == true) &&
$0.isArchived == false
}
}
I'm pretty sure this is a SwiftData bug since when using strings, bools and dates it's all fine using anything outside of that box causes these crashes...
Model your schema with SwiftData
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It's been frustrating to solve this error. My iOS device and Xcode are fully updated. I can easily run app on simulator, but issue happens on my iPhone.
dyld[23479]: Symbol not found: _$s9SwiftData12ModelContextC6insert6objectyx_tAA010PersistentC0RzlFTj
Referenced from: <6FC773BB-E68B-35A9-B334-3FFC8B951A4E> Expected in: /System/Library/Frameworks/SwiftData.framework/SwiftData
Hi,
has anybody managed to get two sqlite stores working? If I define the stores with a configuration for each it seems like that only the first configuration and and therefore the store is recognised.
This is how I define the configuration and container:
import SwiftData
@main
struct SwiftDataTestApp: App {
var modelContainer: ModelContainer
init() {
let fullSchema = Schema([
SetModel.self,
NewsModel.self
])
let setConfiguration = ModelConfiguration(
"setconfig",
schema: Schema([SetModel.self]),
url: FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!.appendingPathComponent("Sets.sqlite"),
readOnly: false)
let newsConfiguration = ModelConfiguration(
"newsconfig",
schema: Schema([NewsModel.self]),
url: FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask).first!.appendingPathComponent("News.sqlite"),
readOnly: false)
modelContainer = try! ModelContainer(for: fullSchema, configurations: [setConfiguration,newsConfiguration])
}
var body: some Scene {
WindowGroup {
ContentView()
}
.modelContainer(modelContainer)
}
}
ContentView is just a basic TabView with a tab for news and a tab for sets.
If I run the program this way the sets tab is shown correctly but switching to News fails. If I change the order of the configurations and write the one for news first like this:
modelContainer = try! ModelContainer(for: fullSchema, configurations: [newsConfiguration, setConfiguration])
then the news tab is shown correctly and switching to sets tab fails.
NewsModel and SetModel only differ in the class name
Import Foundation
import SwiftData
@Model
public class NewsModel{
public var name: String
init(name: String) {
self.name = name
}
}
Also the tab content differs only for referencing the respecting model and the name:
import SwiftData
struct NewsTab: View {
@Query private var news: [NewsModel]
@Environment(\.modelContext) private var modelContext
var body: some View {
ScrollView{
LazyVStack{
ForEach(news){actNews in
Text("Hello, News \(actNews.name)")
}
}
.onAppear {
let news = NewsModel(name: "News from \(Date())")
modelContext.insert(news)
try! modelContext.save()
}
}
}
}
The error message is "NSFetchRequest could not locate an NSEntityDescription for entity name 'NewsModel'" (and SetsModel respectively when change the order of the configuration)
Do I explicitly need to tell the modelContext which configuration it should use or is this done automatically?
I'm a little lost here and hope someone can help me.
Best regards,
Sven
Hi,
if I have a @Model class there's always an id: PersistentIdentifier.ID underneath which, according to the current documentation "The value that uniquely identifies the associated model within the containing store.".
So I am wondering if it is (good) enough to rely on this attribute to uniquely identify @Model class entities, or if there are edge cases where it does not work (like maybe when using CloudKit)?
If anybody saw some information regarding this, please let me know :-)
Cheers,
Michael