AG
Size: a a a
AG
D
D
D
AG
E
E
E
DB
class Transaction(models.Model):
user = models.ForeignKey(User, related_field='transactions')
amount = models.IntegerField()
User.objects.annotate(sum=Sum('transactions__amount')).filter(sum__gte=0)
, но в CheckConstraintZ
AG
class Transaction(models.Model):
user = models.ForeignKey(User, related_field='transactions')
amount = models.IntegerField()
User.objects.annotate(sum=Sum('transactions__amount')).filter(sum__gte=0)
, но в CheckConstraintN
DB
N
AG
DB
AG
Z
N
DB