Hi, new to SwiftUI and Swift in general, but this has been such a helpful site so ...

I have a view that fetches an array of NSManagedObject derived objects and displays some info from this object in a List of NavigationLinks. I pass an individual data object to the child view as an environment object. Something like:

struct ParentView: View {
    @Environment(\.managedObjectContext) var managedObjectContext
    @FetchRequest(sortDescriptors: [SortDescriptor(\.dateCreated)]) var fetchedItems: FetchedResults<Item>

  var body: some View {
    VStack {
      List() {
        ForEach(fetchedItems) { item in
          NavigationLink {
            ChildView(action: .View)
            .environmentObject(item)
           } label: {
                              ...

This all works but I am having trouble in the previews of the child views. The preview looks like:

struct ChildView_Previews: PreviewProvider
{
    static var previews: some View
    {
        ChildView()
            .environmentObject(Item())
            .environment(\.managedObjectContext, PersistenceController.preview.container.viewContext)
    }
}

This works just so long as I don't try to dereference anything in the Item object, but I haven't found a way to intialize the object that xcode doesn't complain about.

Is this good practice to pass fetched objects to child views in the first place? And if so, how do I go about making the preview work?

thanks in advance.