Resolving optional one-to-one relationship for use with SwiftUI ForEach?-CodePudding

I have two CoreData entities A and B, there is a one to one relationship between them. B entity records must always exist. Also A must have a relationship to B.

However, CoreData enforces optional relationship.

ForEach(items, id: \.self) { item in
  MyView(aItem: item, bItem: item.B)
}

Therefore, item.B above is an optional. I need the bItem value to be an ObservedObject, however they can not be optionals

struct MyView: View {
    @ObservedObject var aItem: A
    @ObservedObject var bItem: B

I've tried wrapping an if let around MyView, but this cause a NavigationLink pop issue.

Which ever way I turn I face problems with the optional.

CodePudding user response：

You would deal with it here

MyView(aItem: item, bItem: item.B ?? BManager.create(itemA: item))

BManager being a Manager object that would hold a convenience method to create a blank object.

That way if B happens to be nil an object would get created immediately.

Here is something similar it involves a struct<->CoreData relationship so it isn't exact but similar to this.