how to set server time stamp with firestore admin nodejs sdk?

Question

const firebase = require('@firebase/app').default;
require('@firebase/firestore')

const admin = require('firebase-admin')
const functions = require('firebase-functions')

// initialize the admin SDK...    

exports.setUpdatedDate = functions.firestore.document('/foos/{fooId}/bars/{barId}')
    .onCreate(event => {
      admin.firestore().collection('foos').doc( event.params.fooId )
            .set({
                updatedDate: firebase.firestore.FieldValue.serverTimestamp()
            }, {merge:true})
    })

Running the function shell above and I got:

Cannot encode type ([object Object]) to a Firestore Value
at Function.encodeValue (...\functions\node_modules\@google-cloud\firestore\src\document.js:772:11

so how to set server time stamp with firestore admin nodejs sdk?

It looks like you didn't initialize the admin SDK. Also, it looks like you're requiring client side SDKs. Those don't apply for Cloud Functions. You just need firebase-admin. — Doug Stevenson, Dec 31 '17 at 09:36

score 29 · Accepted Answer · answered Dec 31 '17 at 09:33

29

You can use admin.firestore.FieldValue.serverTimestamp().

API docs: https://firebase.google.com/docs/reference/admin/node/admin.firestore.FieldValue Example usage: https://github.com/firebase/firebase-admin-node/blob/master/test/integration/firestore.js#L61

answered Dec 31 '17 at 09:33

Hiranya Jayathilaka

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34

Thank you! In your opinion updating last updated date is best done by cloud function or client's transaction? – Henry Dec 31 '17 at 17:28
2

I feel like that is something that should be updated along with the client transaction. – Hiranya Jayathilaka Jan 01 '18 at 02:55
1

Usage link is broken – user1114 Jul 07 '20 at 01:18
I´m currently using this function and it´s returning me an empty value – Andrey Solera Oct 03 '21 at 15:58
Here's the updated link for the docs: https://firebase.google.com/docs/reference/js/v8/firebase.firestore.FieldValue – pureth Jan 18 '22 at 08:15

how to set server time stamp with firestore admin nodejs sdk?

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