Flutter Data (Fork)

Persistent reactive models in Flutter with zero boilerplate.

Forked from flutterdata/flutter_data. This fork adds SQLite-based local storage and is used by the ServiceApp project.

Requirements

• Dart SDK >=3.1.0

Features

• Adapters for all models -- Default CRUD and custom remote endpoints with StateNotifier watcher APIs
• Built for offline-first -- SQLite3-based local storage at its core, with failure handling and retry API
• Intuitive APIs, effortless setup -- Configurable and composable via Dart mixins and codegen, with built-in Riverpod providers
• Exceptional relationship support -- Automatically synchronized, fully traversable and reactive relationship graph

Compatible with Flutter (or plain Dart), json_serializable, Freezed, Riverpod, and classic JSON REST APIs. Custom adapters can support Firebase, Supabase, GraphQL, and more.

Quick Start

Annotate a model with @DataAdapter and provide a custom adapter:

@JsonSerializable()
@DataAdapter([MyJSONServerAdapter])
class User extends DataModel<User> {
  @override
  final int? id;
  final String name;
  User({this.id, required this.name});
}

mixin MyJSONServerAdapter on RemoteAdapter<User> {
  @override
  String get baseUrl => "https://my-json-server.typicode.com/flutterdata/demo/";
}

After code generation, the resulting Adapter<User> is accessible via Riverpod:

@override
Widget build(BuildContext context, WidgetRef ref) {
  final state = ref.users.watchOne(1);
  if (state.isLoading) {
    return Center(child: const CircularProgressIndicator());
  }
  final user = state.model;
  return Text(user.name);
}

Save or update models directly:

ref.users.save(User(id: 1, name: 'Updated'));

Or use ActiveRecord-style extension methods:

User(id: 1, name: 'Updated').save();

Initialization

Supply a local storage provider via Riverpod, then initialize:

ProviderScope(
  overrides: [
    localStorageProvider.overrideWithValue(
      LocalStorage(
        baseDirFn: () async {
          return (await getApplicationSupportDirectory()).path;
        },
        busyTimeout: 5000,
        clear: LocalStorageClearStrategy.never,
      ),
    )
  ],
  // ...
),

return Scaffold(
  body: ref.watch(initializeFlutterData(adapterProvidersMap)).when(
    data: (_) => child,
    error: (e, _) => const Text('Error'),
    loading: () => const Center(child: CircularProgressIndicator()),
  ),
);

Development

# Install dependencies
dart pub get

# Run tests (requires libsqlite3-dev on Linux)
dart test

# Analyze
dart analyze

# Format
dart format .

Branches

The repo has both main and master branches. CI runs on both. The current default branch is master.

License

MIT