Adding Server Timestamp field to the Object which being added

Question

I have a Challenge object, which has it\'s own properties and I\'m able to add it to the database successfully like this:

DocumentReference chal         


        

Answer 1

As per Google Documentation You can use FieldValue.serverTimestamp(). Something like this

Java

DocumentReference docRef = db.collection("objects").document("some-id");
Map post = new HashMap<>();
post.put("timestamp", FieldValue.serverTimestamp());

docRef.add(updates).addOnCompleteListener(new OnCompleteListener() {
 .....
}

Kotlin

val docRef = db.collection("objects").document("some-id")
val updates = HashMap()
updates["timestamp"] = FieldValue.serverTimestamp()

docRef.add(updates).addOnCompleteListener { }