goodsnotices/app/Models/Good.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Relations\HasOne;

/**
 * @property GoodsItem $good_item
 */
class Good extends Base
{
    public $fillable = [
        'itemid','typeid','product_name','product_code','product_group',
        'market_price','settlement','category_id', 'category_name'
    ];

    public function goodItem(): HasOne
    {
        return $this->hasOne(GoodsItem::class, 'item_id', 'itemid');
    }
}