laravel model

        $query = DB::table(self::$_table)
                ->when(!empty($params), function($query) use ($params){
                    foreach ($params as $column=>$val){
                        $query->where($column, $val);
                    }
                })
                ->where('del_status', Constant::DATA_IS_NORMAL);
        return (array)$query->first(['*']);