with 1.74.5 and later you only need
db.order_detail.total.compute=lambda r: r['qtd']*r['price']
On Jan 14, 8:51 am, Alexandre Andrade <alexandrema...@gmail.com>
wrote:
> What is the best solution to automatically calculate a total field?
>
> db.define_table ('order_detail',
> Field('product_name'),
> Field('qtd', 'integer'),
> Field('price', 'integer'),
> Field('total', 'integer', writable=False)
> )
>
> Where total = qtd * price
>
> requires and a custom validator? how to do?
> onvalidation on form? how to do?
>
> --
> Atenciosamente
>
> --
> =========================
> Alexandre Andrade
> Hipercenter.com
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