Hello all, I'm finding myself with a compile error when trying to use a defined UTType for Transferable conformance when the type is also an AppEntity.
The compiler error is
Could not determine the identifier of `.todo`. Please use a UTType defined by the UniformTypeIdentifiers framework
However, said compiler error only shows up after adding AppEntity conformance.
So, in order to reproduce:
- Create any type, conform to
Codable
struct Todo: Codable {
var id: UUID
var title: String
var completed: Bool
}
- Create a UTType extension for the new type
extension UTType {
public static let todo: UTType = UTType(exportedAs: "org.nameghino.types.todo")
}
- Add
Transferable
conformance
extension Todo: Transferable {
static var transferRepresentation: some TransferRepresentation {
CodableRepresentation(contentType: .todo)
ProxyRepresentation(exporting: \.title)
}
}
At this point, the code compiles correctly on Xcode 16.2 beta 2 (16C5013f)
- Add
AppEntity
conformance
extension Todo: AppEntity {
static var typeDisplayRepresentation: TypeDisplayRepresentation = "todo_title"
static var defaultQuery = Todo.Query()
var displayRepresentation: DisplayRepresentation {
DisplayRepresentation(title: "\(title)")
}
struct Query: EntityQuery {
typealias Entity = Todo
init() {}
func entities(for identifiers: [UUID]) async throws -> [Todo] {
return []
}
func suggestedEntities() async throws -> [Entity] {
return []
}
}
}
Now the code is not compiling with the aforementioned error.