Laravel Case Mapper Request

A Laravel package that transforms request input keys using PHP 8+ attributes. Supports formats like camelCase, snake_case, StudlyCase, UPPERCASE, enabling flexible data handling from varied sources. Ideal for backend services needing consistent input structures, regardless of client naming conventions.

📦 Designed for Laravel 10, 11, and 12 — No core modification required.

✨ Features

• 🧠 Automatically map incoming request keys to match your validation expectations
• 🧩 Attribute-based syntax using #[MapName(...)]
• 🔄 Supports multiple naming conventions
• 🧩 Integrates seamlessly with Laravel FormRequest
• 📚 Extendable with custom mappers
• ✅ Zero configuration, zero core hacks
• 🎨 Works with any frontend (React, Vue, etc.)

💡 Recommended: Vue or React for best developer experience

🔧 Supported Case Mappers

📦 Installation

composer require erag/laravel-case-mapper-request

No config file or publishing required.

Create a Form Request with Case Mapping

🧩 1. Create a Form Request class

php artisan make:request ContactRequest

🧩 2. Add the attribute and trait

use LaravelCaseMapperRequest\Attributes\MapName;
use LaravelCaseMapperRequest\Traits\HasKeyTransformers;
use LaravelCaseMapperRequest\Mappers\SnakeCaseMapper;

#[MapName(SnakeCaseMapper::class)] // or CamelCaseMapper, UpperCaseMapper, StudlyCaseMapper etc.
class ContactRequest extends FormRequest
{
    use HasKeyTransformers;

    public function authorize(): bool
    {
        return true;
    }
    
    public function rules(): array
    {
        return [
            'first_name' => 'required|string',
            'last_name' => 'required|string',
            'email_address' => 'required|email',
        ];
    }

   
}

🧩 3. Use it in a Controller

use App\Http\Requests\ContactRequest;

class ContactController extends Controller
{
    public function store(ContactRequest $request)
    {
        $validated = $request->validated();

        // Example:
        // Contact::create($validated);

        return response()->json([
            'message' => 'Submitted successfully!',
            'data' => $validated
        ]);
    }
}

Step 3: Frontend Input Example (Vue + Inertia)

<template>
  <form @submit.prevent="submit">
    <input v-model="form.firstName" placeholder="First Name" />
    <input v-model="form.lastName" placeholder="Last Name" />
    <input v-model="form.emailAddress" placeholder="Email" />
    <button type="submit">Submit</button>
  </form>
</template>

<script setup>
import { useForm } from '@inertiajs/vue3'

const form = useForm({
  firstName: '',
  lastName: '',
  emailAddress: ''
})

function submit() {
  form.post('/form/snake')
}
</script>

Step 4: Backend Automatically Maps It

Incoming :

{
  "firstName": "Amit",
  "lastName": "Gupta",
  "emailAddress": "amit@example.com"
}

Mapped for Validation output:

[
  'first_name' => 'Amit',
  'last_name' => 'Gupta',
  'email_address' => 'amit@example.com'
]

🧠 Defining Your Own Case Mapper

Need to support a custom casing style or transformation logic?
You can easily create your own mapper by implementing the CaseMapperContract

Just implement the contract:

use LaravelCaseMapperRequest\Contracts\CaseMapperContract;

class KebabCaseMapper implements CaseMapperContract
{
    public static function map(array $data): array
    {
        return collect($data)
            ->mapWithKeys(fn($value, $key) => [Str::kebab($key) => $value])
            ->toArray();
    }
}

Then apply to any FormRequest:

#[MapName(KebabCaseMapper::class)]

📄 License

MIT © Amit Gupta

🔗 Connect

Made with ❤️ by Amit Gupta

• 🐦 Twitter
• 💼 LinkedIn

⭐ Found this useful? Star it on GitHub!