Question

我有以下问题：我想将模型pre_save函数中的数据传递给我的views.py

原因是在我的pre_save函数中，生成了一个唯一的order_id。此唯一订单ID还必须保存在会话ID中（request.session ['order_id'] = unique_order_id）。模型不接受请求，所以我试图将它保存在我的views.py中，但是如何在那里获得生成的唯一订单ID？

感谢您的帮助！

views.py

def another_view(request):

    if request.POST:
        # Generate unique order_id
        x = Order().save()
        request.session['order_id'] = x
        # This is how I hoped it to solve, but x is not passing any data, even when adding a return variable in pre_save

models.py

# Imports (removed)
# Create your models here.
class Order(models.Model):
    order_id    = models.CharField(max_length=10, unique=True)
    updated     = models.DateTimeField(auto_now=True)
    timestamp   = models.DateTimeField(auto_now_add=True)

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

def order_pre_save_receiver(sender, instance, *args, **kwargs):
    instance.order_id = unique_id_generator(instance)
    # Here the unique order id is generated. Additionally I want to save this id as a session.



pre_save.connect(order_pre_save_receiver, sender=Order)

Answer 1

当你致电x = Order().save()时，你正在创建一个订单对象来更新它而不是保留它

save()方法不返回任何模型对象，而是使用

更新它所调用的对象

所以你需要做的是

x = Order()
x.save() # at this point pre_save is called and unique id is updated
x.order_id # will be your updated order id

Django：将数据传递给pre_save

1 个答案: