screen/application/common/model/GoodsInstallLink.php

<?php

namespace app\common\model;

use think\db\Query;
use think\Model;


class GoodsInstallLink extends Model
{
    public function scopeSku(Query $query,$sku_id,$goods_id=null){
        $query->where('goods_sku_id',$sku_id);
        if($goods_id){
            $query->where('goods_id',$goods_id);
        }
    }
}