how can i add value to specific index in firstore ListField value

Question

I have the following list field in Firestore.

Now, I need to place value in seetsList[2].

FirebaseFirestore.instance.collection('Rooms').doc(widget.roomId).update({
   'seetsList': FieldValue.arrayUnion(?????????????????)
 });

Note: my listValue is always fixed with 5 index and peer index it has default value 0

Is this possible?

Answer 1

There is no way you can update an element that exists in an array by its index. This means you’ll need to:

• Read the content of the array into your application code.
• Update the element in the array using the desired index.
• Write the entire array back to Firestore.

This resource might also help.