My company is providing the steel roof, that type of product not only has the quantity but also come with the size include length and amount of piece. normally, the sales order has many order lines for the same product. I would like to connect all the product that come with same product_id in to a row as picture below. Could you guy please help me redesign the quoation sale order qweb report and invoice qweb report. Thank for your attention.
http://i.imgur.com/87nHfRc.png