Can't write to Firebase Real Time Database - firebase

Question

So, i've setup up a project on Firebase and followed many tutorials on how to connect firebase to my flutter application. I started by reading FlutterFire docs, step by step, and i managed to install the FlutterFire CLI. After that, i went straight into reading the Realtime Database section and whenever i try to write into the db, nothing happens.
The database is in test mode, firebase is correctly initialised inside the project and i get no errors while trying to write inside it, so i think that even the URL is correct (but i might be wrong)
Here's the code i used:
import 'package:firebase_database/firebase_database.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'firebase_options.dart'; //generated with FlutterFire CLI
import 'package:firebase_core/firebase_core.dart';
void main() async {
WidgetsFlutterBinding.ensureInitialized();
SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]);
await Firebase.initializeApp(
options: Platform.isWindows ? null : DefaultFirebaseOptions.currentPlatform, //not working on windows
);
runApp(MyApp());
}
class MyApp extends StatelessWidget {
MyApp({super.key});
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
#override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
final FirebaseDatabase database = FirebaseDatabase.instance;
final DatabaseReference ref = FirebaseDatabase.instance.ref("/");
void writeToFirebase() async {
print('wrote to database');
await ref.set({
'title': 'Hello World',
'body': 'This is my first post',
'userId': '123',
});
await ref.child('title').set('Hello World');
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
const Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: writeToFirebase,
tooltip: 'Increment',
child: const Icon(Icons.add),
),
floatingActionButtonLocation: FloatingActionButtonLocation.centerFloat,
);
}
}
I noticed that when the print() statement is above ref.set() , i see the output in the console. But, if i put it beneath the ref.set() statement, i see no output. So, this makes me think that the ref.set() does never end its execution or something like that.
I'm 2 weeks in learning flutter and i really can't make Firebase work

Answer 1

Since you're using await, did you consider using try-catch too so that you can catch and log any errors?
So:
void writeToFirebase() async {
print('Start writing to database');
try {
await ref.set({
'title': 'Hello World',
'body': 'This is my first post',
'userId': '123',
});
await ref.child('title').set('Hello World');
}
catch (error) {
print(error);
}
finally {
print('Done writing to database');
}
}