Are there any Apple engineers out there that have seen this thread? Several of us filed a Feedback about this. I was just wondering if this is being brought to Apple's attention or whether we are whistling in the wind.

Can you check FB12749735?

They changed the ModelConfiguration inits with Xcode 15 Beta 5. Perhaps that is the issue you are seeing.

Looks like this has been fixed with Xcode 15 beta 6. Yay!

Well, my code is crashing with the following error. SwiftData/BackingData.swift:367: Fatal error: Unknown related type - ChildItem My MainItem @Relationship @Relationship(deleteRule: .cascade, originalName: "events", inverse: \ChildItem.item) var items: [ChildItem]? My ChildItem var item: MainItem? It also crashes when using @Relationship var item: MainItem? for the ChildItem.

Actually, I think it can be as simple as the following example @Model final public class MainItem { var title: String? @Relationship(deleteRule: .cascade) var childs: [ChildItem]? init(title: String? = nil, childs: [ChildItem]? = []) { self.title = title self.childs = childs } } And the child item is. @Model final public class ChildItem { var timestamp: Date? // Add inverse as a simple variable var item: MainItem? init(timestamp: Date? = nil, item: MainItem? = nil) { self.timestamp = timestamp self.item = item } } In the init of the MainItem, set the childs to 'childs: [ChildItem]? = [].' Do NOT set it to nil or you'll crash. I did.

I thought I had a fix, but I do not have a fix.

Has SwiftData been implemented on visionOS yet? I hasn't been. I don't know about beta 6.

I actually have found a workaround. Here it is. let predicate = #Predicate<Data> { data in data.result == result && data.variable?.starts(with: SomeString) ?? false } Note the data.variable?. and the ?? false. This works. I still don't think I should have to discover these things. Something needs to be fixed on Apple's end.

By the way. The following also works. data.variable?.contains(SomeString) ?? false But the following items do not work even though you won't get a warning or an error. data.variable!.starts(with: SomeString) data.variable!.contains(SomeString)

Here's the fix that I found. let searchPredicate = #Predicate<SectionsSD> { $0.toArticles?.contains(filter) ?? false }

It looks like the following works as well. data.variable?.starts(with: SomeString) == true data.variable?.contains(SomeString) == true

I don't see '@Model' above the class definition. @Model public final class Note: Identifiable {...

Here's how I turned my data into a UIImage. var myImage: UIImage? = nil if let imageData = modelEntity.imageData { myImage = UIImage(data: imageData) }

Anybody figure out what is going on here?