Binding Picker to enum value in SwiftData struct

Question

Created 1d

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I have a SwiftData @Model class that has a var of Media.

enum Media: String, CaseIterable, Identifiable, Codable {
	case dvd = "DVD"
	case bluray = "Blu-ray"
	case bluray4k = "Blu-ray 4k"
	
	var			id:String { self.rawValue }
}

In one of my views, I'm trying to show a Picker with the enum values, and then bind the @Model's field to the Picker's selection. I've been trying all kinds of things from suggesting I'm finding online. Here's a poorly pasted version of what my last attempt looks like (I'm sure I have the wrong number of closing curly brackets, but just ignore that):

struct DetailView: View {
	@Binding var			item:Item; // The @Model class.
	@State private var		selectedMedia:Media = .dvd;
	
	var body:some View {
Picker("Media", selection:$selectedMedia) {
						ForEach(Media.allCases, id:\.self) { media in
							Text(media.rawValue);
						}
					}
					.labelsHidden()
					.onAppear() {
						selectedMedia = item.media;
					}
					.onChange(of:selectedMedia) { oldValue, newValue in
						item.media = selectedMedia;
					}
    }
}

What's a good way to make this work? Am I going to have to use a custom formatter of some type, bind the Picker to a string, and convert the selected value with the formatter?

Answer 1

sjmills OP

1d

Nevermind. The confusion of how SwiftData migrates the store when new fields are added made the data bad. After throwing out the store, I can now use the picker in a simple way:

					Picker("Media", selection:$item.media) {
						ForEach(Media.allCases, id:\.self) { media in
							Text(media.rawValue);
						}
					}
					.labelsHidden()

Not sure if it needs that id in the ForEach.