<QuerySet [<Address: Shreyash>，<Address: Shreyash>]>"："Order.address“必须是Address实例

Question

我有与表单相关模型，我想要的是当用户点击提交按钮，从go提交并保存在数据库中，但在这里我得到了错误，所以什么要实现的是一个单一的地址得到提交，而不是所有的地址，这是与白色模型选择字段链接，所以任何想法我可以实现这一点

这是我的models.py

class Order(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE,)
    item = models.ForeignKey(Item, on_delete=models.CASCADE )
    address = models.ForeignKey(Address, on_delete=models.CASCADE)
    price = models.FloatField(blank=False)
    update_at = models.DateTimeField(auto_now=True, editable=False)


    def placeorder(self):
        self.save()
    
    def __str__(self):
        return self.user.username

class Address(models.Model):
    eighteen_choice = {
        ('Yes','Yes'),
        ('No','No')
    }
    phoneNumberRegex = RegexValidator(regex = r"^\d{10,10}$")
    pincodeRegex = RegexValidator(regex = r"^\d{6,6}$")
    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='address')
    reciever_name = models.CharField(max_length=200, blank=False)
    phone_no = models.CharField(validators = [phoneNumberRegex], max_length = 10, blank=False)
    alt_phone_no = models.CharField(validators = [phoneNumberRegex], max_length = 10, blank=True)
    state = models.CharField(max_length=50, choices=state_choice, blank=False)
    pincode = models.CharField(validators = [pincodeRegex], max_length = 6, blank=False)
    eighteen = models.CharField(blank=False, choices=eighteen_choice, default='Yes', max_length=4 )
    city = models.CharField(max_length=100, blank=False)
    address = models.CharField(max_length=500, blank=False)
    locality = models.CharField(max_length=300, blank=True)
    joined_date = models.DateTimeField(default=timezone.now,editable=False)
    update_at = models.DateTimeField(auto_now=True)


    def __str__(self):
        return self.user.username

我的views.py

class Checkout(View):
    def post (self, request,):
        user = request.user
        address = Address.objects.filter(user=request.user)
        ids = (list(request.session.get('cart').keys()))
        items = Item.get_items_by_id(ids)

        for item in items:
            order = Order(user=user, item=item, address=address, price=item.price)
            order.save()
        
        request.session['cart'] = {}

        return redirect('transactions:cart')

我的html

<div class="modal-body">
           <form action="{% url 'transactions:checkout' %}" method="Post">
             {% csrf_token %}
                 #in that i want i want to user select a address instead of all his address 
                    with miltiple choice field
             <input type="submit" class="btn float-right btn-primary" value='Go Ahead'>
           </form>
          </div>

Answer 1

您必须将一个地址传递给订单，我不知道您将如何检查您将使用哪个地址，但一个简单的方法是选择第一个地址，如下所示：

 order = Order(user=user, item=item, address=address.first(), price=item.price)

或者，如果你有一个默认的地址，你可以使用下面的地址：

address = Address.objects.filter(user=request.user, default=True)

如果您以这种方式定义了默认地址，那么您将获得该用户的默认地址。