How to increment individual element in an array in firestore for flutter

Question

This is how my data look like.

I'm able to use FieldValue.increment(1) to update individual fields but is there a way to use FieldValue.increment(1) for specific individual elements in the array? Thanks in advance!

I tried using the following code:

firestore.collection('test').doc('I1raMaJArb1sWXWqQErE')
          .update({
        'rating.0': FieldValue.increment(1),
      });

But the whole rating became empty as seen

Can you please provide your code snippets for better understanding? — Ashok Kuvaraja
– Ashok Kuvaraja, Commented Jun 16, 2021 at 15:04

JM Gelilio · Accepted Answer · 2021-06-16 20:03:16Z

1

You can't use FieldValue.increment() if the field is part of the array. The value of the field inside the array is fixed. The best way to update or edit the field that part of an array is to read the entire document, modify the data in memory and update the field back into the document.

answered Jun 16, 2021 at 20:03

JM Gelilio

3,8061 gold badge15 silver badges25 bronze badges

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

1 Comment

scott lee Over a year ago

Ok, got it. Thank you.

Collectives™ on Stack Overflow

How to increment individual element in an array in firestore for flutter

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