baoshi-was/app/ReceivingTaskItem.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasOne;

class ReceivingTaskItem extends Model
{

    protected $fillable = [
        'receiving_task_id','asn_no',
    ];

    public function receivingTask(): BelongsTo
    {
        return $this->belongsTo(ReceivingTask::class);
    }

    public function docASNHeader(): HasOne
    {
        return $this->hasOne(OracleDOCASNHeader::class,'asn_no','asnno');
    }

}