laravel-beginning/form-app-with-data/app/Http/Resources/ContactMessageResource.php

<?php

namespace App\Http\Resources;

use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\JsonResource;

class ContactMessageResource extends JsonResource
{
    /**
     * Transform the resource into an array.
     *
     * @return array<string, mixed>
     */
    public function toArray(Request $request): array
    {
        return [
            'id' => $this->id,
            'sender_name' => $this->name,
            'sender_email' => $this->email,
            'message_body' => $this->message,
            'submitted_at' => $this->created_at->format('Y-m-d H:i:s'),
            
            'category' => new CategoryResource($this->whenLoaded('category')),
            'status' => new StatusResource($this->whenLoaded('status')),
            'notes' => NoteResource::collection($this->whenLoaded('notes')),
        ];
    }
}