python - Django / python : Calculate total amount of item in django template

Question

如何在 Django 模板中计算总数？

假设我想生成一份客户订单 list ，例如:

我有以下数据:

obj = [{"location": "name", "timeSlot": '09:30 PM', "price": 2}, {"location": "name", "timeSlot": '09:30 PM', "price": 1}, {"location": "name", "timeSlot": '09:30 PM', "price": 3}, {"location": "name", "timeSlot": '09:30 PM', "price": 2}, {"location": "name", "timeSlot": '09:30 PM', "price": 4}]

期望的报告输出

 --------------------
        09:30 PM
  --------------------
    1   name   $ 2
    2   name   $ 1
    3   name   $ 3
    4   name   $ 4
------------------------
    Total      $ 10 

Answer 1

模板不是执行此操作的正确位置。您应该在您的 View 或模型中执行此操作。例如，在您收到订单后，您可以执行以下操作:

orders=order.objects.filter(id=timeslot)
total = 0
for order in orders:
    total += order['price']

return render(request, 'your_template', {'orders': orders, 'total': total})

现在，总计将与订单一起出现在您的模板中