You could overwrite the save() method... or if you are populating from a
form, overwrite the clean() method.
On Thursday, February 7, 2013 3:23:54 AM UTC-5, vijay shanker wrote:
>
> Hi
> I have these two models Cart and CartItem,
>
> class Cart(models.Model):
> cart_id = models.CharField(max_length=
> 50, null=False)
> customer = models.ForeignKey(Customer,null=True,blank=True)
> cartitems = models.ManyToManyField(CartItem,null=True)
> applied_rule =
> models.OneToOneField(CartRule,null=True,blank=True)
>
>
> class CartItem(models.Model):
> content_type = models.ForeignKey(ContentType)
> object_id = models.PositiveIntegerField()
> content_object = generic.GenericForeignKey('content_type','object_id')
> quantity = models.PositiveIntegerField(default=0)
> is_abandoned = models.BooleanField(default=False)
> def __str__(self):
> return self.cart_id
>
> the rules to be applied only when there are more than two items in
> shoppingcart, i.e i am looking for a way to attach a rule to cart only if
> there are more than two items in cart (cartitems m2m field should have more
> than two objects in it).
> How should i go about it ?
>
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