Issues with Codable struct and Measuments<Unit> - json

Question

Can't figure out how to save to JSON standard units of the Dimension class, I have a struct:
struct Item: Hashable, Identifiable, Codable {
var id: Int
var name: String
var price: Int
var unit: Measurement<Unit>
}
Xcode doesn't throw any errors so I'm assuming Measurement can be encoded? I can't really make it working and save a json, and how should my json data look like if I want to load the struct with a test json?
[
{
"id": 1,
"name": "Test",
"price": 195,
"unit": ???
}
]
The idea is that I operate with the standard Dimension class that has all units I need (kg/g/L/ml) instead of creating my own class and describe all units from scratch.
Is it possible to have a JSON with "unit": "kg" that then will match a standard UnitMass.kilogram automatically?
Thanks.

Answer 1

For me this actually works with this (simplified) example:
struct Item: Codable {
var name: String
var unit: Measurement<Unit>
}
let json =
"""
{
"name": "Test",
"unit": {
"value": 12,
"unit": {
"symbol": "ml"
}
}
}
""".data(using: .utf8)!
let item = try JSONDecoder().decode(Item.self, from: json)
yields the correct result. You can replace the unit symbol with anything you like (kg, g, ml, e.t.c)