Dfyjkt

Is there any way to update and push simultaneously?

I want to update a key2 in my object and simultaneously push unique keys under timeline in a single request ref().child('object').update(...).

object
 key1:
 key2: // update
 key3:
 timeline:
 -LNIkVNlJDO75Bv4: // push
 ...

Is it even possible or one ought to make two calls in such cases?

Calling push() with no arguments will return immediately (without saving to the database), providing you with a unique Reference. This gives you the opportunity to create unique keys without accessing the database.

As an example, to obtain a unique push key, you can do some something like:

var timelineRef = firebase.database().ref('object/timeline');
var newTimelineRef = timelineRef.push();
var newTimelineKey = newTimelineRef.key;

With this, you can then perform a multi-level update which makes use of the new key:

var objectRef = firebase.database().ref('object');

var updateData = ;
updateData['object/key2'] = key: 'value' ;
updateData['object/timeline/' + newTimelineKey] = key: 'value' ;

objectRef.update(updateData, function(error) 
 if (!error) 
 console.log('Data updated');
 
);