baoshi-was/app/Services/ReceivingTaskItemService.php

<?php

namespace App\Services;

use App\ReceivingTask;
use App\Traits\ServiceAppAop;
use App\ReceivingTaskItem;

class ReceivingTaskItemService
{
    use ServiceAppAop;

    protected $modelClass = ReceivingTaskItem::class;

    public function createItems($task, $asn_nos)
    {
        if (is_array($asn_nos)) {
            foreach ($asn_nos as $no) {
                $task->items()->create(['asn_no' => $no]);
            }
        } else if (is_string($asn_nos)){
            $task->items()->create(['asn_no' => $asn_nos]);
        }

    }

}