FR: ServerTimestamp constant for firebase.database

[mastef]

Describe your environment

• Operating System version: all
• Firebase SDK version: v3.13.0
• Firebase Product: database

Describe the problem

The serverside timestamp value is a unique field in Firebase databases, as it's uploaded with the json { ".sv" : "timestamp" } and then converted to a timestamp on the serverside.

The javascript realtime database sdk has a constant called firebase.database.ServerValue.TIMESTAMP for this.

The golang Firestore sdk has a constant for the ServerTimestamp value : . https://godoc.org/cloud.google.com/go/firestore#pkg-constants.

And allows setting it in a struct as :

type TimeObject struct {
    TS     time.Time     `firestore:"ts, serverTimestamp"`
}

This seems to be missing in the database SDK. I guess the serverTimestamp value is a sugar on top, but it would be nice to have the constant available in the database package as well.

Relevant Code:

type TimeObject struct {
    TS     time.Time     `json:"ts"`
}

data := TimeObject{
     TS: firebase.db.ServerTimestamp
}

_, err := firebase.db.NewRef("someref").Push(context.Background(), data)