Django获取相关对象ManyToMany关系

Question

我有两个模型：

class CartToys(models.Model):
    name = models.CharField(max_length=350)
    quantity = models.IntegerField()

class Cart(models.Model):
    cart_item = models.ManyToManyField(CartToys)

我想把所有相关的玩具都买到这个购物车上。我怎样才能做到这一点

Answer 1

你会用...

cart = Cart.objects.first()
objects = cart.cart_item.all() # this line return all related objects for CartToys
# and in reverse
cart_toy = CartToys.objects.first()
carts = cart_toy.cart_set.all() # this line return all related objects for Cart