Dart Data Class Generator Fork

A community fork of Dart Data Class Generator. Generate Dart data classes from class properties or JSON, including constructors, copyWith, Map/JSON serialization, equality, and toString.

This is an independent fork, not an official release by the original authors. It builds on the work of bxqm and the huang12zheng fork. See Credits and license below.

What's different in this fork

• JSON and Map keys use snake_case by default; Dart fields remain camelCase.
• JSON input preserves its original key spelling for serialization when snake_case conversion is disabled. The generator detects names that would collide after conversion instead of silently producing duplicate fields.
• Dependency security fixes and expanded integration tests.
• Existing command IDs and dart_data_class_generator.* settings remain compatible with the previous extension.

Generate from class properties

1. Open a Dart file with a class containing fields.
2. Open the Command Palette with Ctrl+Shift+P (Cmd+Shift+P on macOS).
3. Run Dart Data Class Generator Fork: Generate from class properties. If the file contains multiple classes, select the classes to generate.

You can also put the cursor on a class, constructor, or field and use the Quick Fix menu (Ctrl+. / Cmd+.) to generate a whole class or selected methods.

Running generation again updates generated methods. Review the diff first: custom changes to generated methods may be overwritten.

For enums, annotate the field with a comment:

// enum
final Status status;

Equatable and EquatableMixin generation can be enabled through the settings below.

Generate from JSON

1. Paste raw JSON into an otherwise empty .dart file.
2. Open the Command Palette and run Dart Data Class Generator Fork: Generate from JSON.
3. Enter the top-level class name. For nested objects, choose whether to use separate files or the current file.

JSON import is still a beta feature. In particular, a numeric sample such as 1 may be inferred as int even if later payloads contain fractional values.

Snake-case serialization

The setting dart_data_class_generator.json.snakeCase defaults to true. For example, the Dart field firstName is serialized with the Map/JSON key first_name; generated toMap and fromMap use the same key. Set it to false to keep the original input key spelling instead. The toJson and fromJson methods delegate to the Map methods.

{
  "dart_data_class_generator.json.snakeCase": false
}

Changing this setting changes the wire format of regenerated classes. Check compatibility with existing API payloads before switching it in an established project. If two input keys normalize to the same Dart field or serialization key, generation reports a collision.

Additional features

The extension also offers a quick fix to sort and format Dart imports.

Settings

All settings retain the dart_data_class_generator prefix for compatibility.

Test locally

Run npm ci, then npm test with VS Code and Dart installed. In VS Code, open this repository and press Ctrl+F5 to launch an Extension Development Host without attaching the debugger. You can run either command there before publishing. For a packaged check, build a VSIX with npx @vscode/vsce package and install it in a separate VS Code profile using Extensions: Install from VSIX....

Credits and license

The original Dart Data Class Generator was created by bxqm. This repository also follows the huang12zheng fork. The fork's new work is maintained by Ultramarcante contributors. The original MIT copyright notice remains in LICENSE.md, and the earlier release history remains in CHANGELOG.md.

Issues and contributions for this fork: ultramarcante-inc/Dart-Data-Class-Generator-fork.