Can we flatten structs?

[helje5]

Looks like SwiftData flattens Codable structure into own table columns vs storing them as JSON. Presumably to be able to run queries against such.

E.g.

@Model class Person {
  struct Address: Codable {
    var street: String
    var city: String
  }
  var privateAddress : Address
}

Even though the property is just one in the model, I think it ends up in separate columns in SQLite. Presumably to allow this:

#Predicate {
  $0.privateAddress.street = "XYZ"
}

Which seems valuable?

Not sure how we would hook that up in Core Data yet, I'd guess the Entity would need to get attributes for those.

[helje5]

Actually that should be reasonable to do, a write to the address would just push down to the individual attributes. The reflection to destructure the structs in the macro might be fishy though. I guess it should work, if the structure is within the class itself.