hi there i'm working on an restaurant ordering system , when someone order
more than one product with different quantities for each product , be able
to select its quantities
it may order 3 Pizza with 2 sandwich , how to let the customer to define
the quantities of each product , and then calculate with its prices
class Restaurant(models.Model):
name = models.CharField(max_length=50)
price = models.PositiveIntegerField(default=1)
def __str__(self):
return self.name
class Topping(models.Model):
name = models.CharField(max_length=50)
product_names = models.ManyToManyField(Restaurant, blank=True)
quantity = models.PositiveIntegerField(default=1)
total price of orders , for one product for example : one pizza with
one sandwich however they order more than one pizza and sandwich
@property
def total(self):
return self.product_names.aggregate(Sum('price'))['price__sum']
I expected to provide a quantity field for each selected items : pizza : 3
, sandwich:2 , then calculate them (3*pizza price , 2*sandwich price)
thanks for advice
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