Flutter Freezed Model Helper

Helps you write Freezed annotated classes (compatible with Freezed 2.x / Dart 3) and run code generation directly from VS Code.

👉 Flutter Freezed Model Helper on Visual Studio Marketplace

Fork Notice

This extension is a fork of mthuong/vscode-flutter-freezed-helper, created because the original repository has been inactive for 5 years.

Setup

Add the following to your pubspec.yaml:

dependencies:
  freezed_annotation: x.x.x
  json_annotation: x.x.x

dev_dependencies:
  build_runner: x.x.x
  freezed: x.x.x
  json_serializable: x.x.x

Features

frf — Setup a new file with a Freezed class

Expands to a complete file skeleton with imports, part directives and a model class compatible with Freezed 2.x / Dart 3:

import 'package:freezed_annotation/freezed_annotation.dart';

part 'my_model.freezed.dart';
part 'my_model.g.dart';

@freezed
abstract class MyModel with _$MyModel {

  const factory MyModel({
    required String id,
  }) = _MyModel;

  factory MyModel.fromJson(Map<String, dynamic> json) =>
      _$MyModelFromJson(json);
}

frc — Add a Freezed class

Expands to a standalone Freezed class body, useful when the file is already set up:

@freezed
abstract class MyModel with _$MyModel {

  const factory MyModel({
    required String id,
  }) = _MyModel;

  factory MyModel.fromJson(Map<String, dynamic> json) =>
      _$MyModelFromJson(json);
}

frfp — Setup a new file with a Freezed class with private constructor

Same as frf but includes const ClassName._(), which allows you to add custom methods and getters to the class — required by Freezed whenever you need methods (e.g. mapping a model to a domain entity):

import 'package:freezed_annotation/freezed_annotation.dart';

part 'my_model.freezed.dart';
part 'my_model.g.dart';

@freezed
abstract class UserModel with _$UserModel {
  const UserModel._(); // enables custom methods

  const factory UserModel({
    required String id,
  }) = _UserModel;

  factory UserModel.fromJson(Map<String, dynamic> json) =>
      _$UserModelFromJson(json);

  UserEntity toEntity() => UserEntity(id: id);
}

frcp — Add a Freezed class with private constructor

Same as frc but includes const ClassName._(), which allows you to add custom methods and getters to the class — required by Freezed whenever you need methods (e.g. mapping a model to a domain entity):

@freezed
abstract class UserModel with _$UserModel {
  const UserModel._(); // enables custom methods

  const factory UserModel({
    required String id,
  }) = _UserModel;

  factory UserModel.fromJson(Map<String, dynamic> json) =>
      _$UserModelFromJson(json);

  UserEntity toEntity() => UserEntity(id: id);
}

Cursor ($0) is placed inside the class body, ready to write the first method.

Run Code Gen

Runs dart run build_runner build in the workspace root.

Toggle Watch Mode

Starts or stops dart run build_runner watch to continuously regenerate code on file changes.

Credits

This extension is a fork of mthuong/vscode-flutter-freezed-helper, created because the original repository has been inactive for 5 years.