Creating an Identifiable id gives inmutable warning-CodePudding

I have the following:

struct myModel: Decodable, Identifiable {
    let id = UUID()
    let a, b, c: String
}

I'm getting the following warning:

Immutable property will not be decoded because it is declared with an initial value which cannot be overwritten

I don't want to change the id once the data is refreshed, I just want to assign it once. How can I get rid of that warning?

CodePudding user response：

Either declare id as var or add CodingKeys and omit id.

And please name structs and classes always with starting capital letter

struct MyModel: Decodable, Identifiable {
    private enum CodingKeys: String, CodingKey { case a, b, c } 

    let id = UUID()
    let a, b, c: String
}

CodePudding user response：

Right now, myModel conforms to Codable for archival. When decoding, ID will be set to a new UUID instead of the UUID defined in the 'id' field in the file.

If you want to preserve IDs when decoding the structs (say, if you write it to a file and want the same ID when reading back), remove the inline initializer and write a full initializer that takes a, b, and c as arguments.

If you don't want to preserve IDs when decoding, ignoring the warning and keeping the code as-is is sufficient.