public function order_by($order_by = null, $order_way = 'asc')
    {
        $this->order_by = $order_by;
        $this->order_way = $order_way;
        return $this;
    }
public function order_by($order_by = null, $order_way = 'asc')
    {
        $this->order_by = $order_by;
        $this->order_way = $order_way;
        return $this;
    }
public function order_by ( $ order_by = null , $ order_way = 'asc' ) { $ this -> order_by = $ order_by ; $ this -> order_way = $ order_way ; return $ this ; }
Set the ORDER BY condition of a query

@param string $order_by The field name to order on
@param string $order_way The way for ordering (asc or desc - default is 'asc')
@return object The whole object itself for method chaining
Set the ORDER BY condition of a query