I'd like to build relations with objects without saving to pre-
determine the price for a proposed order based on a set of products.
But when I add a Product project to the Order, I first have to save
the Order. Is there any way around this?
Example:
class Order(Model):
id = models.AutoField(primary_key=True)
number = models.IntegerField()
def total(self):
return sum([p.price for p in self.product_set])
class Product(Model):
id = models.AutoField(primary_key=True)
order = models.ForeignKey(Order)
price = models.DecimalField()
order = Order(number=1)
# Now the nex line throws an error if we did not save the order here
order.product_set.create(Product(price=20.0))
assert order.total() == 20.0
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Django users" group.
To post to this group, send email to django-users@googlegroups.com
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/django-users?hl=en
-~----------~----~----~----~------~----~------~--~---
