* Cédric Krier [2011-05-12 10:13 +0200]:
On 12/05/11 09:45 +0200, Paul J Stevens wrote:
This makes me wonder if perhaps the whole required state machinery needs
to be able to allow zero values on numeric fields to satisfy the
requirement. I'm well aware of where this comes from: in python numeric
values of zero evaluate to False. However, is a business context an
explicit zero-amount is *not* the same as an unspecified amount, or in
other words: 0 is not False, only False is False.
Have you ideas about how we could be sure to not have zero-amount per error?
You can have a sql constraint and a boolean field.
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