Xcode preview crashes on DB loop read SwiftUI - swift

Question

When I call Core Data using:
#FetchRequest(
entity: Entity.entity(),
sortDescriptors: [
NSSortDescriptor(keyPath: \Entity.id, ascending: true),
]
) var myData: FetchedResults<Entity>
then inside the View:
VStack {
ForEach(myData, id: \.self) { data in
Text("Test")
}
}
Xcode live preview crashes, if I remove the ForEach with a simple text it would work, how can I fix this? This is my current preview:
struct HomeItemListView_Previews: PreviewProvider {
static var previews: some View {
HomeItemListView()
}
}
This is the error it shows:
PotentialCrashError: MyApp.app may have crashed
MyApp.app may have crashed. Check ~/Library/Logs/DiagnosticReports for any crash logs from your application.
==================================
| Error Domain=com.apple.dt.ultraviolet.service Code=12 "Rendering service was interrupted" UserInfo={NSLocalizedDescription=Rendering service was interrupted}
As side note, the code compiles fine and displays fine on the normal simulator, it's the live one that has issues.
UPDATE:
So I have a viewRouter that controls the first screen, example Onboarding, if true, it goes to onboarding, if false it goes to HomeView.
This is how I have setup SceneDelegate:
let viewRouter = ViewRouter()
let contentView = MotherView()
.environment(\.managedObjectContext, context)
.environmentObject(viewRouter)
// Set the MotherView as the root view
window.rootViewController = UIHostingController(rootView: contentView)
On my MotherView, I have the Preview like this:
struct MotherView_Previews: PreviewProvider {
static var previews: some View {
MotherView().environmentObject(ViewRouter())
}
}
And on the Home view I have it like this:
struct HomeView_Previews: PreviewProvider {
static var previews: some View {
HomeView()
}
}

Answer 1

So, most probably, your HomeItemListView preview should be set as follows
struct HomeItemListView_Previews: PreviewProvider {
static var previews: some View {
let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
return HomeItemListView()
.environment(\.managedObjectContext, context)
.environmentObject(ViewRouter())
}
}