python - Django 更改和跟踪订单状态

Question

我的模型中有一个状态字段，其默认值正在进行中。每当创建新订单时，都会为订单提供默认值 in-progress。现在我添加了一个新功能，当客户输入订单 ID 时，它会显示订单状态。我想在我的功能中添加新功能，当客户输入 order.id 并点击跟踪订单状态时，订单状态应自动更改为预定状态，如果我稍后更新订单状态，它不应该显示预定状态，而是我将显示的状态选择。我可以在我的 View 函数中添加什么来实现它？

models.py

class Order(models.Model):
    name = models.CharField(max_length=30)
    address = models.CharField(max_length=100
   status = models.CharField(max_length = 100, choices = choices) default="In Progress")
choices = (('Received', 'Received'),
        ('Scheduled', 'Scheduled'), 
        ('Shipped', 'Shipped'),
        ('In Progress','In Progress'),
        )```

views.py

def order_tracker(request):
    if request.method=="POST":
        orderId = request.POST.get('orderId', '')
        try:
            order=Order.objects.filter(pk=orderId)

            if len(order)>0:
                update = Order.objects.filter(pk=orderId)
                updates = []
                for order in update:
                    order.status = 'Scheduled'
                    order.save()
                    updates.append({'status' : order.status})
                    response = json.dumps(updates)
                    return HttpResponse(response)
            else:
                return HttpResponse('{}')
        except Exception as e:
            return HttpResponse('{}')
    return render(request,"status/track.html")

Answer 1

def order_tracker(request):
    if request.method=="POST":
        orderId = request.POST.get('orderId', '')
        try:
            order=Order.objects.filter(pk=orderId)

            if len(order)>0:
                update = Order.objects.filter(pk=orderId)
                updates = []
                for order in update:
                    # change order status to scheduled
                    if order.status == 'processing':
                        order.status = 'scheduled'
                        order.save()
                    updates.append({'status' : order.status})
                    response = json.dumps(updates)
                    return HttpResponse(response)
            else:
                return HttpResponse('{}')
        except Exception as e:
            # add some logging here
            return HttpResponse('{}')
    return render(request,"tracker.html")

顺便说一句，您似乎想要一份订单 list ？如果您应该只获得一个订单，请使用 Order.objects.get()，如果条件不匹配，这将引发 DoesNotExist 异常。

def order_tracker(request):
    if request.method=="POST":
        orderId = request.POST.get('orderId', '')
        try:
            order=Order.objects.get(pk=orderId)
            if order.status == 'processing':
                order.status = 'scheduled'
                order.save()
            return JsonResponse({'status' : order.status})
        except: Order.DoesNotExist:
            return JsonResponse({})
    return render(request,"tracker.html")