How to decode DocumentReference with Skip Firebase?

[pbergg]

Hi everyone,
I'm using SkipFirebase and I understood we have to do the decoding ourselves, which is easy for most types.
However, I can't figure out how to decode DocumentReference objects or access their content on Android.

For normal types I fetch the [String: Any] dictionary with the .data() function which I then pass into JSONSerialization.data before decoding it as JSON. However, as the serialization fails with DocumentReference, I tried to obtain the documentID directly and pass them as String to my models.

Casting the reference is ignored on Android, I can't obtain more than the type name and have not yet found a way to see the content of the reference. I understood the type is different in Kotlin but I have not found how to manipulate it.

func sanitizeFirestoreData(_ data: [String: Any]) -> [String: Any] {
    var sanitized = [String: Any]()
    for (key, value) in data {
        sanitized[key] = sanitizeFirestoreDataElement(value)
    }
    return sanitized
}

func sanitizeFirestoreDataElement(_ value: Any) -> Any {
    if let documentRef = value as? DocumentReference { //Ignored on Android
        return documentRef.documentID
    } else { //Dates, array, maps also sanitized
        return value
    }
}

func fetchAndDecode() async throws {
    let fetched = try await NetworkingManager.fetchDocument(withId: "123") //Returns [String: Any]
    let sanitizedData = sanitizeFirestoreData(fetched)
    let jsonData = try JSONSerialization.data(withJSONObject: sanitizedData, options: []) //Always fails at this point on Android
    let decoded = try JSONDecoder().decode(TestType.self, from: jsonData)
}