[cloud_firestore] Can't add to list with transaction. Please Help. about flutterfire HOT 5 CLOSED

Temporary workaround was to make the placeholder a map instead and in the transaction add the map to the existing map (placeholder).

await Firestore.instance.collection('users').document(user.uid).setData({ 'ban_list': new Map(), });

await tx.update(postRef, <String, dynamic>{ 'ban_list': postSnapshot.data['ban_list']..addAll({listOfDocs[index]['id'] : listOfDocs[index]['id']}) });

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I'm confused by your original code snippet, since it looks like you're using the return value of .add (void) as a value in a Map. I'm not sure if the issue is in the plugin, the native SDK, or your code, but if you want to write an integration test for it I'd be happy to investigate further.

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try this:
await tx.update(postRef, <String, dynamic>{ 'ban_list': postSnapshot.data['ban_list'].toList() .add(listOfDocs[index]['id']) });
calling toList will make a new growable list from the fixed-length list, which will allow you to add new elements to it.

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@mikeyyg96 did it work for you?

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Hi @mikeyyg96
I'm closing this issue for inactivity.
If you disagree please write in the comments
and I will reopen it.
Thank you

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