On Friday, June 23, 2017 at 4:01:05 AM UTC-4, kesh wrote:
>
> hi guys sorry to intrude, i have a problem here
>>
> db.define_table('stock_status',
> Field('Date', 'datetime', default=request.now, writable=False),
> Field('SN'),
> Field('item_description'),
> Field('Quantity','integer'),
> Field('UOM'),
> Field('stockIN','integer'),
> Field('stockOUT', 'integer'),
> #Field('stock_at_hand','integer'),
> Field('assignment')
> )
> class MyVirtualFields(object):
> def total_price(self):
> return self.stock_status.Quantity + self.stock_status.stockIN -
> self.stock_status.stockOUT
> db.stock_status.stock_at_hand.virtualfields.append(MyVirtualFields())
>
First, the above is an old-style virtual field -- you should instead use
the new style
<http://web2py.com/books/default/chapter/29/06/the-database-abstraction-layer#New-style-virtual-fields>.
Second, that is not the correct code even for the old style -- see the
documentation:
http://web2py.com/books/default/chapter/29/06/the-database-abstraction-layer#Old-style-virtual-fields
Anthony
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