Firestore: ServerValue.TIMESTAMP occasionally resulting in { ".sv": "timestamp" }

[Manish Malik]

Hi,

I have a simple update on a property whenever the user performs a particular action:

(JS code)

        let dbUserRef = firebase.firestore().collection("dummyactionrecords").doc(UID);

        dbUserRef.update({

            lastUpdated: firebase.database.ServerValue.TIMESTAMP

        })

Occasionally, instead of updating the field "lastUpdated" with a timestamp, it gets the value { ".sv": "timestamp" }. I say "occasionally", because I haven't been able to detect a pattern on why some of the objects get a proper timestamp, while others don't. I had seen this mentioned on threads using RTDB in the past, but I haven't found a relevant one on Firestore.

While I try to figure out a pattern and then a reason, any pointers / idea would be great.

Thanks.

[Michael Bleigh]

You are using the rtdb server value. You need:

firebase.firestore.FieldValue.serverTimestamp()

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[Manish Malik]

Thanks for the catch! Turned out to be the residue from rtdb -> firestore code conversion. Fixed!