Question

请问有人可以帮我解决一下问题，我想访问 Order 模型中引用的 item 模型中的项目，但是试图从以下位置访问该项目订单模型这是模特这是用于访问的模型

    0   2   3
0   0   1.4 3
1   0   1.3 1
2   0   0.5 3

这是我要访问的父模型

class Order(models.Model):
    user = models.ForeignKey(settings.AUTH_USER_MODEL,on_delete=models.CASCADE)
    ref_code = models.CharField(max_length=20)
    items = models.ManyToManyField(OrderItem)
    start_date = models.DateTimeField(auto_now_add=True)
    order_date = models.DateTimeField()
    ordered = models.BooleanField(default=False)
    shipping_address = models.ForeignKey('Address',on_delete=models.SET_NULL,related_name='shipping_address',blank=True,null=True)
    payment = models.ForeignKey('Payment',on_delete=models.SET_NULL,blank=True,null=True)
    being_delivered = models.BooleanField(default=False)
    received = models.BooleanField(default=False)
    refund_requested = models.BooleanField(default=False)
    refund_granted = models.BooleanField(default=False)

并且此模型中尝试访问的商品必须

class OrderItem(models.Model):
    user = models.ForeignKey(settings.AUTH_USER_MODEL,on_delete=models.CASCADE)
    ordered_order = models.BooleanField(default=False)
    item = models.ForeignKey(Item, on_delete=models.CASCADE)
    quantity = models.IntegerField(default=1)

我正在尝试此操作，但似乎不起作用

class Item(models.Model):
    title = models.CharField(max_length=100)
    price = models.IntegerField()
    discount_price = models.IntegerField(blank=True, null=True)
    category = models.ForeignKey(Categories, on_delete=models.DO_NOTHING)
    tags = models.ManyToManyField(Tags, related_name='itemTags')
    slug = models.SlugField(max_length=200, unique=True)
    size = models.CharField(blank=True, null=True, max_length=5)
    model = models.CharField(max_length=100, blank=True, null=True)
    description = models.TextField()
    quantity = models.IntegerField(default=1)
    image = models.ImageField()
    color = models.CharField(max_length=100, blank=True, null=True)
    brand = models.CharField(max_length=100, blank=True, null=True)
    Display = models.DecimalField(max_digits=100,
                                  decimal_places=1,
                                  blank=True,
                                  null=True)
    ram = models.CharField(max_length=100, blank=True, null=True)
    material = models.CharField(max_length=100, blank=True, null=True)
    hdd = models.CharField(max_length=100, blank=True, null=True)
    size = models.CharField(max_length=100, blank=True, null=True)
    lens = models.CharField(max_length=100, blank=True, null=True)
    created_at = models.DateField(auto_now_add=True)

有人可以帮助我吗！

Answer 1

您需要输入以下代码：

recent_orders=Order.objects.filter(user=2)
for order in recent_orders:
    for order_item in order.items:
        print(order_item.item.title)

尝试为所有变量赋予不同的名称，这将使编程更有效

从Django中的子模型访问父模型的属性

1 个答案: