Is it normal for timestamp to be saved into Firestore as "timestamp"?

Question

I am saving server value timestamp as follow:

let data : [String: Any] = ["userId": 9,
                            "name": "Elon Musk",
                            "timeCreated": ServerValue.timestamp()]

 let doc = firestore.collection("orders").document()
 doc.setData(data){ (error) in

 }

When looking into Firestore, though I see this:

Is this normal? Shouldn't there be instead a long containing the number of milliseconds since the Unix Epoch?

Answer 1

You're using the Realtime Database notion of server timestamp, which is ServerValue.timestamp. It's essentially a dictionary with the values you showed: {'.sv': 'timestamp'}. That's not compatible with Firestore.

Instead, you want to use Firestore's notion of server timestamp, which is FieldValue.serverTimestamp(). Also see the very last sample in the documentation here.