firebase database - adding the current server-side timestamp as a key-CodePudding

using firebase functions (NODE) I would like to create a timestamp base node to save my data using timestamp as key name:

EX:

WATERLEVEL
    16934723478:1
    16934723482:2
    16934723483:50

I'm trying to using this code without success.

    const timest = admin.database.ServerValue.TIMESTAMP ;

    let waterData = {};
    waterData[timest] = req.body.WATERLEVEL;

    rtdb.child("SENSOR").child(req.body.SERIAL).child("LEVEL").update(waterData);

Can somebody drive me to the right approach ? could a variable been used as key ?

CodePudding user response：

The admin.database.ServerValue.TIMESTAMP variable is not actually a timestamp, but an instruction to the database to write the current timestamp. There is no way in the Firebase Realtime Database to write this value into a key; it can only be used in values.

If you want to write the current server-side timestamp from Cloud Functions as a key, use:

const timest = Date.now();