Firestore - batch.add is not a function

Question

The documentation for Firestore batch writes lists only set(), update() and delete() as permitted operations.

Is there no way

Answer 1

For PHP you can try :

$batch = $db->batch();
$newCityRef = $db->collection('cities')->newDocument();
$batch->set($newCityRef , [ 'name'=>'New York City' ]);