Actually I did notice that typo, I tried the append() already, my code
is:
class VirtualFields:
def profit(self): return self.Orders.income - self.Orders.cost
db.Orders.virtualfields.append(VirtualFields())
this line runs fine, but later when I need to access a virtual field,
an exception is raised:
File "C:\DOWNLOAD\google_appengine\web2py\gluon\sql.py", line 658,
in __getitem__
return dict.__getitem__(self, key)
KeyError: 'profit'
Ideas? Thanks.
-Iceberg
On Apr5, 12:00pm, Thadeus Burgess <thade...@thadeusb.com> wrote:
> I think its
>
> db.table.virtualfields.append()
>
> -Thadeus
>
>
>
> On Sun, Apr 4, 2010 at 10:51 PM, Iceberg <iceb...@21cn.com> wrote:
> > Hi there,
>
> > I search virtualfields inhttp://www.web2py.com/bookbut found
> > nothing.
>
> > So I read this post instead:
> > https://groups.google.com/group/web2py/browse_frm/thread/d59ee3d6c2e6...
>
> > But I found that
> > db.table.virtualfields.add(ComputedFields())
> > doesn't work.
>
> > Only this work:
> > rows.setvirtualfields(table=ComputedFields())
>
> > Does the former syntax really supposed to exist?
>
> > I am using web2py 1.75.4
>
> > Regards,
> > Iceberg
>
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