Cart Sale Model Sample

gistfile1.py

class CartSale(models.Model):
    first_name = models.CharField(
        max_length=100,
    )
    last_name = models.CharField(
        max_length=100,
    )
    date_sale = models.DateTimeField(
        auto_now_add=True,
    )
    email = models.EmailField()

class CartProduct(models.Model):
    upc = models.CharField(
        max_length=100,
    )
    cartsale = models.ForeignKey(
        CartSale,
        related_name='products',
    )
    quantity = models.IntegerField()
    price = models.DecimalField(
        max_digits=8,
        decimal_places=2,
    )
    product_detail = models.ForeignKey(
        ProductDetail,
    )

class Product(models.Model):
    name = models.CharField(
        max_length=30,
    )
    reference = models.CharField(
        max_length=30,
    )

class ProductDetail(models.Model):
    price = models.DecimalField(
        max_digits=8,
        decimal_places=2,
    )
    quantity = models.PositiveIntegerField(
        blank=True,
        default=0,
    )
    upc = models.CharField(
        max_length=100,
    )