🐛 [cloud_firestore] runTransaction stopped working on web.

[bernaferrari]

I just updated firebase to the last version and the following code is breaking on the web. On macOS it works fine.

This is the previous version I was using, which worked:

direct dependencies:                 
async                                 *2.8.2     *2.8.2      *2.8.2      2.9.0     
cloud_firestore                       *3.3.0     3.4.0       3.4.0       3.4.0     
cloud_functions                       *3.3.2     3.3.3       3.3.3       3.3.3     
firebase_auth                         *3.4.2     3.5.0       3.5.0       3.5.0     
firebase_core                         *1.19.2    1.20.0      1.20.0      1.20.0    
firebase_database                     *9.0.19    9.0.20      9.0.20      9.0.20    
firebase_storage                      *10.3.2    10.3.3      10.3.3      10.3.3    
flutter_multi_formatter               *2.5.7     2.5.8       2.5.8       2.5.8     

This is the code I'm running, there is nothing abnormal:

await FirebaseFirestore.instance.runTransaction((transaction) async {
          for (final data in data.websitesHistory) {
            transaction.set(documentReference, serverData.toJson());
          }
});

This is the error message (in console only, no message in IntelliJ):

Error: firebase_firestore.TransactionOptions is not a constructor
main.dart.js?v=2887564051:62600

TypeError: firebase_firestore.TransactionOptions is not a constructor

It is an horrible bug because a try/catch won't catch it. Might be coming from the platform.

Flutter doctor

Run flutter doctor and paste the output below:

Click To Expand

➜ flutter doctor -v
[✓] Flutter (Channel stable, 3.0.5, on macOS 11.4 20F71 darwin-x64, locale
    en-BR)
    • Flutter version 3.0.5 at /usr/local/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision f1875d570e (9 days ago), 2022-07-13 11:24:16 -0700
    • Engine revision e85ea0e79c
    • Dart version 2.17.6
    • DevTools version 2.12.2

---

[kaumudpa]

Same problem here across projects.

[MrMagloire]

Same problem here across projects.

[darshankawar]

The possible fix seems to have been merged #9188 and new version of the plugin (web) is also released: https://pub.dev/packages/cloud_firestore_web/changelog#281.
Please try using latest plugin version and see if it works.

[bernaferrari]

On changelog it should be "fix runTransaction" because it is a lot more severe than it is written.