条件查询中的多or和and条件结合

一个需求里面要求一个关键字输入匹配多个字段模糊查询结果，多次验证后最终需要如下操作才能正确返回

       public function getList($keyword="",$page=1,$limit=30)
        {
            $supliper = new Supplier();
            $wheres["isdel"] = 0;
            if($keyword!=""){
                $wheres["sname|numbers|contactuser|tel"] = array("like","%".$keyword."%");
            }

            $list = $supliper->where($wheres)
                             ->order("id",'desc')
                             ->paginate($limit,false,['query' => array('keyword'=>$keyword,'limit'=>$limit,
                                                           'page'=>$page)]);
            return $list;
        }

生成的sql为

 SELECT * FROM `hc_supplier` WHERE `isdel` = 0 AND ( `sname` LIKE '%关键字%' OR `numbers` LIKE '%关键字%' OR `contactuser` LIKE '%关键字%' OR `tel` LIKE '%关键字%' ) ORDER BY `id` desc LIMIT 0,30