django 订单和购物车逻辑

一个纯粹的工作逻辑问题（没有代码）。例如，我们有一个与用户关联的购物车

class Cart(models.Model):
    """ Корзина """
    profile = models.ForeignKey(Profile, on_delete=models.CASCADE, verbose_name='Покупатель')
    products = models.ManyToManyField('CartProduct', blank=True, related_name='related_cart')
    final_price = models.IntegerField(default=0, verbose_name='Общая цена')

    def __str__(self):
        return str(self.id)

    class Meta:
        verbose_name = 'Корзина'
        verbose_name_plural = 'Корзины'

class CartProduct(models.Model):
    """ Объект корзины """
    profile = models.ForeignKey(Profile, on_delete=models.CASCADE, verbose_name='Покупатель')
    product = models.ForeignKey(Product, on_delete=models.CASCADE)
    quantity = models.PositiveIntegerField(default=1, blank=True)
    final_price = models.IntegerField(verbose_name='Общая цена', blank=True)

    def save(self, *args, **kwargs):
        self.final_price = self.quantity * self.product.price
        super().save(*args, **kwargs)

    def __str__(self):
        return "Объект: {} (для корзины)".format(self.product.title)

    class Meta:
        verbose_name = 'Объект корзины'
        verbose_name_plural = 'Объекты корзины'
class Order(models.Model):
    """ Заказ """
    profile = models.ForeignKey(Profile, on_delete=models.CASCADE, verbose_name='Покупатель')
    products = models.ManyToManyField('OrderItem', blank=True, related_name='related_order')
    billid = models.CharField(max_length=200)
    comment = models.TextField(default='BagleyEcommerce')
    final_price = models.IntegerField(default=1)
    paid = models.BooleanField(default=False)
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)

    def __str__(self):
        return str(self.id)

    class Meta:
        verbose_name = 'Заказ'
        verbose_name_plural = 'Заказы'


class OrderItem(models.Model):
    """ Предмет заказа """
    profile = models.ForeignKey(Profile, on_delete=models.CASCADE, verbose_name='Покупатель')
    product = models.ForeignKey(Product, on_delete=models.CASCADE)
    quantity = models.PositiveIntegerField(default=1, blank=True)
    final_price = models.IntegerField(verbose_name='Общая цена', blank=True)

    def save(self, *args, **kwargs):
        self.final_price = self.quantity * self.product.price
        super().save(*args, **kwargs)

    def __str__(self):
        return "Объект: {} (заказ)".format(self.product.title)

    class Meta:
        verbose_name = 'Объект заказа'
        verbose_name_plural = 'Объекты заказа'

问题：是否可以将订单直接链接到购物篮？或者在该人将更多商品添加到购物篮并付款后，该人按下了支付按钮（创建了与购物篮相关的订单）。购买后，他会得到篮子里的产品（是在付款之前还是之后？）或者你需要像我一样在订单中复制订单？

如果不清楚，请写在评论中，我会尽力回答。