sfp_api_laravel_ginastica_cerebro/app/Http/Resources/ClassPackageResource.php

<?php

namespace App\Http\Resources;

use Carbon\Carbon;
use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\JsonResource;
use Illuminate\Http\Resources\Json\AnonymousResourceCollection;
use App\Models\ClassPackage;

class ClassPackageResource extends JsonResource
{
    public function toArray(Request $request): array
    {
        return [
            'id'                      => $this->id,
            'name'                    => $this->name,
            'quantity_classes'        => $this->quantity_classes,
            'contract_value'          => $this->contract_value,
            'contract_material_value' => $this->contract_material_value,
            'contract_register_value' => $this->contract_register_value,
            'contrat_discount_value'  => $this->contrat_discount_value,
            'created_at'              => Carbon::parse($this->created_at)->format('Y-m-d H:i:s'),
            'updated_at'              => Carbon::parse($this->updated_at)->format('Y-m-d H:i:s'),

            'materials' => $this->whenLoaded('products', fn() =>
                $this->products->map(fn($product) => [
                    'product_id' => $product->id,
                    'name'       => $product->name,
                    'quantity'   => $product->pivot->quantity,
                    'price'      => (float) $product->pivot->price,
                ])
            ),
        ];
    }

    /**
     * @param \Illuminate\Database\Eloquent\Collection<ClassPackage> $resource
     * @return \Illuminate\Http\Resources\Json\AnonymousResourceCollection<ClassPackageResource>
     */
    public static function collection($resource): AnonymousResourceCollection
    {
        return parent::collection($resource);
    }
}