flutter_instantdb_generator #

Build-time code generator for flutter_instantdb. It turns plain annotated model classes into type-safe query tables, typed transactions, and relation accessors over the same InstantDB engine.

• 📚 Docs: https://flutter-instantdb.vercel.app/typed/codegen
• 📦 Runtime package: flutter_instantdb

Install #

Add the runtime package as a dependency and the generator + build_runner as dev dependencies:

dependencies:
  flutter_instantdb: ^1.1.2

dev_dependencies:
  build_runner: ^2.4.13
  flutter_instantdb_generator: ^0.2.0

Usage #

Annotate a model with @InstantModel and declare it as a part:

import 'package:flutter_instantdb/flutter_instantdb.dart';

part 'todo.instant.dart';

@InstantModel('todos')
class Todo {
  final String id;
  final String title;
  @InstantField('done_at')
  final int? doneAt;
  const Todo({required this.id, required this.title, this.doneAt});
}

Run the generator:

dart run build_runner build --delete-conflicting-outputs

This emits todo.instant.dart with a TodoTable and typed extensions:

// Typed query
final todos = await TodoTable()
    .query()
    .where((t) => t.title.like('%urgent%'))
    .order((t) => t.title.asc())
    .getAll(db);

// Typed write
await db.transact(
  TodoTable().tx(db).createModel(Todo(id: db.id(), title: 'Ship it')),
);

Annotations #

• @InstantModel('namespace') — marks a class as an InstantDB model.
• @InstantField('attr') — overrides the stored attribute name for a field.
• @InstantLink() — marks a relation field. Cardinality is inferred from the field type (List<T> → to-many, T → to-one); the target must itself be an @InstantModel. Emits a typed .include(...) accessor, a recursively-typed fromRow, and a RelationRef for typed linkRel/unlinkRel.

See the typed-layer docs for the full reference.

License #

MIT — see LICENSE.