I think it should be db.item.total_price = Field.Virtual(lambda row: row.item.unit_price*row .item.quantity)
This was an experimental feature and it may be wrong in the book. On Wednesday, 12 September 2012 11:21:10 UTC-5, KMax wrote: > > > Hello, > I was looking the book http://www.web2py.com/books/default/chapter/29/06 > And intrested with: > > New style virtual fields (experimental) > > > Create model.db with: > > db.define_table('item', > Field('unit_price','double'), > Field('quantity','integer')) > db.item.total_price = Field.Virtual(lambda row: row.unit_price*row.quantity) > > Open database admin and insert some numbers > but the table view gives only flash with: > > 'Row' object has no attribute 'unit_price' > > and no data. > > Please correct my mistake, > I think I missed something. > > Thanks, > Maxim > --
