How to update an array of Objects in Firebase Firestore?

Question

I know how to update an array of objects like this:- (Note: This is the field in my Firestore DB)

details: [
{para:'Something..'},
{para:'Something again...'}
]

It will be done like this:-

db.collection(myCollection).doc(myID).update({
    details: firebase.firestore.FieldValue.arrayUnion({
        para: 'This will get added'
        })
    })

But What if the array of objects is inside another object like this??

details: {
    descrip: [
        {para:'Something..'}
    ]
}

When I try to do like this:-

db.collection(myCollection).doc(myID).update({
        details: {
            descrip: firebase.firestore.FieldValue.arrayUnion({
                para: 'This will get added'
            })
        }
        })

It removes the old para('Something..') and replaces it with the new one('This will get added').

I want this to happen:-

details: {
    descrip: [
        {para:'Something..'},
        {para:'This will get added'}
    ]
}

Is there any way to do it??

You may ask that if there is an easy way to do it(The above one) then why doing this. Actually this is just an example to get an idea of how it works. I am working on nested arrays of objects.

Renaud Tarnec · Accepted Answer · 2021-03-13 16:52:19Z

1

The following should do the trick:

  db.collection('myCollection')
    .doc('myID')
    .update({
      ['details.descrip']: firebase.firestore.FieldValue.arrayUnion({
        para: 'This will get added',
      }),
    });

answered Mar 13, 2021 at 16:52

Renaud Tarnec

83.4k10 gold badges99 silver badges130 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Zaeem Khaliq Over a year ago

Yes it is. Thanks a lot

Collectives™ on Stack Overflow

How to update an array of Objects in Firebase Firestore?

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related