firebase - How can I update more than 500 docs in Firestore using Batch?

Question

I'm trying to update a field timestamp with the Firestore admin timestamp in a collection with more than 500 docs.

const batch = db.batch();
const serverTimestamp = admin.firestore.FieldValue.serverTimestamp();

db
  .collection('My Collection')
  .get()
  .then((docs) => {
    serverTimestamp,
  }, {
    merge: true,
  })
  .then(() => res.send('All docs updated'))
  .catch(console.error);

This throws an error

{ Error: 3 INVALID_ARGUMENT: cannot write more than 500 entities in a single call
    at Object.exports.createStatusError (C:UsersGrowthfileDesktopcf-testfunctions
ode_modulesgrpcsrccommon.js:87:15)
    at Object.onReceiveStatus (C:UsersGrowthfileDesktopcf-testfunctions
ode_modulesgrpcsrcclient_interceptors.js:1188:28)
    at InterceptingListener._callNext (C:UsersGrowthfileDesktopcf-testfunctions
ode_modulesgrpcsrcclient_interceptors.js:564:42)
    at InterceptingListener.onReceiveStatus (C:UsersGrowthfileDesktopcf-testfunctions
ode_modulesgrpcsrcclient_interceptors.js:614:8)
    at callback (C:UsersGrowthfileDesktopcf-testfunctions
ode_modulesgrpcsrcclient_interceptors.js:841:24)
  code: 3,
  metadata: Metadata { _internal_repr: {} },
  details: 'cannot write more than 500 entities in a single call' }

Is there a way that I can write a recursive method which creates a batch object updating a batch of 500 docs one by one until all the docs are updated.

From the docs I know that delete operation is possible with the recursive approach as mentioned here:

https://firebase.google.com/docs/firestore/manage-data/delete-data#collections

But, for updating, I'm not sure how to end the execution since the docs are not being deleted.

Answer 1

Waitting for answers