Multiply in django template

Question

I am looping through cart-items, and want to multiply quantity with unit-price like this:

{% for cart_item in cart.cartitem_set.all %}
{{cart_item.quantity}}         


        

Answer 1

Or you can set the property on the model:

class CartItem(models.Model):
    cart = models.ForeignKey(Cart)
    item = models.ForeignKey(Supplier)
    quantity = models.IntegerField(default=0)

    @property
    def total_cost(self):
        return self.quantity * self.item.retail_price

    def __unicode__(self):
        return self.item.product_name