Firebase FieldValue.arrayUnion() not working properly on client SDK

user_15415605 0
Viewed 485

When I try to create an array in firestore with this code

await store
    .collection("video")
    .doc(videoId)
    .set(
      {
        data: firebase.firestore.FieldValue.arrayUnion(userId),
      },
      {merge: true},
    )

The data created in firestore then look like

this

google-cloud-firestore firebase react-native arrays javascript
2 Answers

This behavior appear because I was using firestore from @react-native-firebase/firestore and importing firebase from firebase library instead of @react-native-firebase/app so i had to change this

import firebase from "firebase"

To this

import firebase from "@react-native-firebase/app"
user_154156050

First, omit the trailing comma after {merge:true}.

If that doesn't fix it, can you share how you define "userId" and "store"?

user_62778620
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