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Riverpod bug
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| import 'package:flutter/material.dart'; | |
| import 'package:flutter_riverpod/flutter_riverpod.dart'; | |
| final baseProvider = Provider<int>( | |
| (ref) => 0, | |
| ); | |
| final dependentProvider = Provider<String>( | |
| (ref) { | |
| final q = ref.watch(baseProvider); | |
| return '$q'; | |
| }, | |
| dependencies: [baseProvider], | |
| ); | |
| void main() { | |
| runApp(const ProviderScope(child: AppRoot())); | |
| } | |
| class AppRoot extends StatelessWidget { | |
| const AppRoot({super.key}); | |
| @override | |
| Widget build(BuildContext context) { | |
| return const MaterialApp( | |
| home: MainPage(), | |
| ); | |
| } | |
| } | |
| class MainPage extends StatefulWidget { | |
| const MainPage({super.key}); | |
| @override | |
| State<MainPage> createState() => _MainPageState(); | |
| } | |
| class _MainPageState extends State<MainPage> { | |
| var overridingValue = 1; | |
| @override | |
| Widget build(BuildContext context) { | |
| return Scaffold( | |
| body: Center( | |
| child: Column( | |
| mainAxisSize: MainAxisSize.min, | |
| children: [ | |
| ProviderScope( | |
| overrides: [ | |
| baseProvider.overrideWithValue(overridingValue), | |
| ], | |
| child: const MyConsumer(), | |
| ), | |
| ElevatedButton( | |
| onPressed: () { | |
| setState(() {++overridingValue;}); | |
| }, | |
| child: const Text('increment (check the console)'), | |
| ), | |
| ], | |
| ), | |
| ), | |
| ); | |
| } | |
| } | |
| class MyConsumer extends ConsumerWidget { | |
| const MyConsumer({Key? key}) : super(key: key); | |
| @override | |
| Widget build(BuildContext context, WidgetRef ref) { | |
| // the print line in listen below is executed only when this line is commented out | |
| // If you uncomment this line, the print line is not executed anymore. | |
| // | |
| // final q = ref.watch(baseProvider); | |
| ref.listen( | |
| dependentProvider, | |
| (previous, next) { | |
| print('Listened to $previous -> $next. Try again after uncommenting line 76!'); | |
| }, | |
| ); | |
| return const SizedBox.shrink(); | |
| } | |
| } |
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