Informe de ranking de productos más vendido

my_report.py

@@ -30,7 +30,7 @@ class my_report_model(osv.osv):
 					c.pos AS suma,
 					c.lastdate
                 FROM product_template a
-                LEFT JOIN(select product_id AS product_id,name AS nombre,SUM(product_uom_qty) AS pos , MAX(create_date) AS lastdate from sale_order_line group by product_id,name) c on c.product_id=a.id
+                LEFT JOIN(select product_id AS product_id,name AS nombre,SUM(quantity) AS pos , MAX(create_date) AS lastdate from account_invoice_line group by product_id,name) c on c.product_id=a.id
                 WHERE c.pos>0 and a.sale_ok = True
             )
         """)