🧬 json_model_gen

A sleek CLI tool to effortlessly generate Dart model classes from raw JSON.

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✨ Features

• 🔄 Convert raw JSON to Dart model classes
• ❄️ Supports freezed annotation
• ♻️ Supports equatable
• 🔒 Make all fields nullable (optional)
• 💬 Interactive prompts (if flags aren't provided)
• 🛑 Overwrite protection with confirmation
• 📁 Auto-renames .json → .dart when needed

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🚀 Installation

From pub.dev:

dart pub add json_model_gen

Or manually add to your pubspec.yaml:

dependencies:
  json_model_gen: ^0.0.6

Then:

dart pub get

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🔧 Usage

✅ Full command with all options:

dart run json_model_gen \
  --input=raw.json \
  --output=lib/user_model.dart \
  --class=UserModel \
  --freezed \
  --equatable \
  --nullable

🧠 Interactive mode:

If you omit the flags:

dart run json_model_gen

You’ll be guided step-by-step to:

• 📅 Enter input file path
• 📄 Enter output file path
• 🧪 Enter class name
• ⚙️ Use equatable?
• ❄️ Use freezed?
• ❓ Make all fields nullable?

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📌 Example

Input (raw.json)

{
  "id": 1,
  "name": "Alice",
  "active": true,
  "bio": null
}

Output (user_model.dart)

import 'package:freezed_annotation/freezed_annotation.dart';

part 'user_model.freezed.dart';
part 'user_model.g.dart';

@freezed
class UserModel with _$UserModel {
  const factory UserModel({
    int? id,
    String? name,
    bool? active,
    String? bio,
  }) = _UserModel;

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

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⚠️ Notes

• ✅ Input must be raw JSON only (not Dart code).
• 📄 If the input is a .dart file, you'll receive a warning.
• 💳 Class names are validated to ensure PascalCase formatting.
• 📌 Output paths ending in .json will be renamed to .dart automatically.

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️⭐ Star the GitHub repo if this helps you!