You are right. I misunderstood the issue.
On Oct 23, 11:21 am, Anthony <abasta...@gmail.com> wrote: > On Sunday, October 23, 2011 11:49:31 AM UTC-4, Massimo Di Pierro wrote: > > > lines[cash_price]=lines(cash_price) or 0 > > I don't think that will solve the problem. That will add a new > 'SUM(orderline.cash_price)' key to lines rather than updating > lines._extra['SUM(orderline.cash_price)']. However, when you subsequently do > lines[cash_price], it will pull the old value from > lines._extra['SUM(orderline.cash_price)'] and ignore the new value stored in > the new key. This is because Row.__getitem__ always gets the value stored in > _extra when the key is in _extra > (http://code.google.com/p/web2py/source/browse/gluon/dal.py#3888). To enable > the assignment, I guess you'd have to update Row.__setitem__ so it would > update _extra when the key is in _extra (though not sure if there are any > downsides to that). > > Anthony
