Hi everyone,
I'm looking for the proper django way to do an update of an attribute on my
model instance, but only if the attribute current value is checked agains't
a condition, in an atomic way, something like this:
def use_money(self, value):
begin_transaction()
real_money = F('money')
if real_money >= value:
self.money = F('money') - value
self.save()
end_transaction()
I want to make sure that I avoid race condition so money never goes below 0.
Can you help me out?
Thanks,
Sebastien
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