shipping-portal/app/Http/Resources/OrderPackagesReceivedResource.php

<?php

namespace App\Http\Resources;

use App\Classes\ValueObjects\Constants\PackingListType;
use Illuminate\Http\Resources\Json\JsonResource;

//Originally from OrderPackagesBaseResource
class OrderPackagesReceivedResource extends JsonResource
{
    /**
     * Transform the resource into an array.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return array
     */
    public function toArray($request)
    {
        $received_packages = $this->packingLists()->where('type', PackingListType::WAREHOUSE_RECEIVE_LIST)->whereHas('packages')->get();

        return [
            'id' => $this->id,
            'reference' => $this->reference,
            'reference_contract' => (int) $this->type,
            'type' => (int) $this->type,
            'status' => (int) $this->status,
            'received_packages' =>  PackingListForPackagesReceivedResource::collection($received_packages),
            'created_at' => $this->created_at->format('d-m-Y')
        ];
    }
}