Flutter FirebaseDatabase run transaction crash

Question

i'm trying run a transaction in the firebase database using Flutter and i am getting an error, can someone help me to solve this?

Code:

ref.runTransaction((MutableData transaction) async {
      transaction.value = (transaction.value ?? 0) + 1;
      return transaction;
    });

Error:

E/RepoOperation(16416): Caught Throwable.
E/RepoOperation(16416): java.lang.RuntimeException: Methods marked with @UiThread must be executed on the main thread. Current thread: FirebaseDatabaseWorker
E/RepoOperation(16416):     at io.flutter.embedding.engine.FlutterJNI.ensureRunningOnMainThread(FlutterJNI.java:605)
E/RepoOperation(16416):     at io.flutter.embedding.engine.FlutterJNI.dispatchPlatformMessage(FlutterJNI.java:515)
E/RepoOperation(16416):     at io.flutter.embedding.engine.dart.DartMessenger.send(DartMessenger.java:76)
E/RepoOperation(16416):     at io.flutter.embedding.engine.dart.DartExecutor.send(DartExecutor.java:166)
E/RepoOperation(16416):     at io.flutter.view.FlutterNativeView.send(FlutterNativeView.java:155)
E/RepoOperation(16416):     at io.flutter.plugin.common.MethodChannel.invokeMethod(MethodChannel.java:98)
E/RepoOperation(16416):     at io.flutter.plugins.firebase.database.FirebaseDatabasePlugin$1.doTransaction(FirebaseDatabasePlugin.java:345)
E/RepoOperation(16416):     at com.google.firebase.database.core.Repo.startTransaction(com.google.firebase:firebase-database@@17.0.0:831)
E/RepoOperation(16416):     at com.google.firebase.database.DatabaseReference$4.run(com.google.firebase:firebase-database@@17.0.0:511)
E/RepoOperation(16416):     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:458)
E/RepoOperation(16416):     at java.util.concurrent.FutureTask.run(FutureTask.java:266)
E/RepoOperation(16416):     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301)
E/RepoOperation(16416):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
E/RepoOperation(16416):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
E/RepoOperation(16416):     at java.lang.Thread.run(Thread.java:764)

Thanks in advance.

Solution

I was getting the same error while using flutter dev channel. Going to stable channel fixed it for me. To check which channel you are do flutter channel

To switch to stable channel do:

flutter channel stable
flutter upgrade

Comments

[Jorge Vieira]

You right, the version stable is working, it get crashed in some version after the version 1.5.8 i guess. Thank you.

[Saifallak]

i added as issue for Flutter , follow it github.com/flutter/flutter/issues/33562

[Eric Duffett]

Awesome!! Thanks!! Is the flutter upgrade command required? It resulted in some breaking changes in my pubspec.yaml file that I had to go in and fix.