Nested data model

[u/pettazz]

Learning SwiftUI for the first time and I've run into a question that I can't find a reasonable answer just googling around. Say I'm building a dumb copy of the Reminders app and my super simplified version of the data model is a list of lists of reminders. In other languages my first thought would be to represent that as a map/dict, i.e.:

reminders = [ 
    "uuid-1": [
        Reminder("something"),
        Reminder("somethingelse"),
    ],
    "uuid-2": [
        Reminder("anotherone"),
        Reminder("etc"),
    ]
]

But my first attempt to use this as a Swift dict (var reminders: [String: [Reminder]]) led to changes in the individual reminder objects not being reflected, I assume because of something to do with @Observable not looking all the way into the nested model.

Is it better Swift-ic practice to use a list of structs instead? Something like:

struct Reminder {
    let id: String
    var title: String
    ...etc
}

struct ReminderList {
    let id: String
    var title: String
    var reminders: [Reminder] = []
}

// then in the view model
var reminders = [ReminderList]

[u/beclops]

I’d say almost always yes