Question

我有两个模型，BookTicket和Ticket。

class BookTicket(models.Model):
    user = models.ForeignKey(User)
    booking_ref = models.CharField(max_length=25, blank=True)

class Ticket(models.Model):
    seat = models.ForeignKey(Seat)
    user = models.ForeignKey(User)
    show = models.ForeignKey(Show)
    booking_ref = models.ForeignKey(BookTicket)

这是来自客户端的数据

[
    {u'seat': 49, u'user': 3, u'show': 2}, 
    {u'seat': 50, u'user': 3, u'show': 2}
]

我想要做的是，如果序列化is_valid，则创建一个新的预订对象，并将该对象更新为所有故障单数据的booking_ref。

def buy_ticket(request):
    serialized = TicketSerializer(data=request.data, many=True)
    if serialized.is_valid():
        ...
        b = BookTicket.objects.create(user=request.user)
        ...
        ... update all of the data's booking_ref with newly created booking instance i.e., b
        ...
        serialized.save()
        return Response(serialized.data, status=status.HTTP_201_CREATED)
    return Response(serialized._errors, status=status.HTTP_400_BAD_REQUEST)

我该怎么做？

Answer 1

您可以将b作为save方法（docs）的参数传递。这将为新票证添加booking_ref：

serialized = TicketSerializer(data=request.data, many=True)
if serialized.is_valid():
    b = BookTicket.objects.create(user=request.user)
    serialized.save(booking_ref=b)

如何更新有序的序列化数据？

1 个答案: