On Tue, Jul 7, 2015 at 4:31 PM, Carlos Andre <eucan...@gmail.com> wrote:
> I want copy some values to other fields in other table!
>
That's fine, although I would only recommend doing so if the qtdade in
Person and 'value' field in Contact can contain different data in some
scenario. You will still need to set a static default (ie default='')
in the model definition and override the save() method to do the copy,
though:
# This is a bit naive and assumes that p always contains a Person
object. Add validation and/or business logic accordingly.
def save(self, *args, **kwargs):
# If no PK, we know this is a new object and that value hasn't been set
if not self.pk:
self.value = self.p.qtdade
super(Contact, self).save(*args, **kwargs) # Call the "real" save() method.
If they will always be the same, I would recommend keeping the
approach that I sent out originally, and in addition, adding a
property or model method to retrieve that data in the Contact class.
-James
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