Sorry for wasting your preciuose time. I'm very newby in django.
I have de following
class Commessa(models.Model):
commessa = models.CharField(max_length=20)
quota_oraria=models.DecimalField(max_digits=5, decimal_places=2)
...
class Diario(models.Model):
data= models.DateField('data inizio')
commessa = models.ForeignKey(Commessa)
ore=models.IntegerField()
...
I want to add a column to Commessa containg the result of:
quota_oraria * sum(ore)
for each item in commessa.
any suggestion will be greatly appreciated; tank vwry much in advance
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