shipping-portal/app/Transformers/DeliverPackingListTransformer.php

<?php

namespace App\Transformers;

use App\Models\PackingList;
use League\Fractal\Resource\Collection;
use League\Fractal\Resource\Item;
use League\Fractal\TransformerAbstract;

class DeliverPackingListTransformer extends TransformerAbstract
{
    /**
     * List of resources to automatically include
     *
     * @var array
     */
    protected $defaultIncludes = [
        'transport',
        'packing_list',
        'company'

    ];

    /**
     * List of resources possible to include
     *
     * @var array
     */
    protected $availableIncludes = [
        //
    ];

    /**
     * A Fractal transformer.
     *
     * @param PackingList $list
     * @return array
     */
    public function transform(PackingList $list): array
    {
        return [
            'id' => $this->$list,
            'claimant_id' => $list->claimant_id,
            'reference' => $list->reference,
            'status' => $list->status,
        ];
    }

    /**
     * include transport
     * @param PackingList $list
     * @return Item
     */
    public function includeTransport(PackingList $list): Item
    {
        return $this->item($list->transports()->first(), new TransportTransformer);
    }

    /**
     * add packing list
     * @param PackingList $list
     * @return Collection
     */
    public function includePackingList(PackingList $list): Collection
    {
        return $this->collection($list->packing_list_owner(), new PackageListTransformer);
    }

    /**
     * add company
     * @param PackingList $list
     * @return Item
     */
    public function includeCompany(PackingList $list): Item
    {
        return $this->item($list->owner(), new CompanyModuleTransformer);
    }
}