Similar issue! The joys of coding.

I think your question should be a class if you want to persist it in SwiftData. I think the general advice (for SwiftData) is: structs are for views, classes are for models. Your models would be something like this: @Model final class Exam { let timestamp: Date let id: String var title: String @Relationship(deleteRule: .cascade, inverse: \Question.exam) var questions: [Question] = [] init(title:String = "") { self.timestamp = .now self.id = UUID().uuidString self.title = title } } @Model final class Question { let id: String var number: Int var points: Int var prompt: String var answer: String @Relationship var exam: Exam? = nil init( number: Int = 0, points: Int = 0, prompt: String = "", answer: String = "" ) { self.id = UUID().uuidString self.number = number self.points = points self.prompt = prompt self.answer = answer } } I hope this helps!