arrayUnion with objects produces null values

First of all, thanks for a fantastic library!

I am having some trouble updating an array in my document, using arrayUnion;

note: Just to test the two different versions of the API, I am doing the update operation twice. My imports are as follows:

const firebase = require('nativescript-plugin-firebase')
const fbApp = require('nativescript-plugin-firebase/app')

When I attempt to update my array using a primitive (I have tested string and number), it seems to work fine:

    let scan = 1234
    console.log('Updating scans with', scan)

    driver.update(
      {
        scans: fbApp.firestore().FieldValue().arrayUnion(scan),
        scans2: firebase.firestore.FieldValue.arrayUnion(scan),
      }
    )

My updated fb store via console:

However, when I change my value to an object, it inserts null instead:

    let scan = {foo: "bar"}
    console.log('Updating scans with', scan)

    driver.update(
      {
        scans: fbApp.firestore().FieldValue().arrayUnion(scan),
        scans2: firebase.firestore.FieldValue.arrayUnion(scan),
      }
    )

FB Console:

Any idea what I could be doing wrong here?

(I can work around this by JSON.stringify-ing my input, but that seems like a slightly silly solution…)

I am using version 7.7.0 and so far am only testing on Android, so I’m not sure if this is a problem on iOS

[EddyVerbruggen]

Thanks for those details, that really helped. Pretty sad I can’t find any official example of using an object with arrayUnion, but anyway: got it fixed!

On iOS it already worked as expected by the way.

Available in 8.0.0 which will be out later this week(end).

[solvemon]

Sure, the results are as expected in the console: