Models topic

Models

1. Annotate your class

import 'package:macro_kit/macro_kit.dart';

@dataClassMacro
class User with UserData {
  const User({
    required this.id,
    required this.name,
    required this.email,
  });

  final int id;
  final String name;
  final String email;
}

Note

Dart source code must be placed inside the lib directory for the macro to generate code properly. However, for testing purposes, you can pass an absolute path instead of a package name to force it to load into the analysis context.

2. Save and generate

Press Ctrl+S to save. Generation happens instantly!

  • First run: ~3-5 seconds (one-time setup)
  • Subsequent runs: <100ms ⚡

3. Use the generated code

The macro automatically generates:

  • ✅ fromJson(Map<String, dynamic> json) constructor
  • ✅ toJson() method
  • ✅ Equality operators (==, hashCode)
  • ✅ copyWith() method
  • ✅ toString() method
// Use it immediately
final User user = UserData.fromJson({'id': 1, 'name': 'Alice', 'email': 'alice@example.com'});
final json = user.toJson();
final updated = user.copyWith(name: 'Bob');

Next: Data Class Macro