Re: [web2py] recursive sum in virtual fields

[Vasile Ermicioi]

http://www.wellho.net/mouth/912_Recursion-in-Python.html

<http://www.wellho.net/mouth/912_Recursion-in-Python.html>perhaps this could
be a better solution (not tested, I just give you an idea)

class MyVirtualFields(object):
   def item_countself):
       sum = db.order_item.quantity.sum()       return
db(db.order_item.item==self.item).select(sum).first()[sum]