Question

我有以下django课程：

class Event(models.Model):
    calendar = models.ForeignKey(Calendar, related_name='cal_event')
    department = models.ForeignKey(Department, related_name='events')
    title = models.CharField(max_length=30)
    date = models.DateTimeField('event date')
    roles = models.ManyToManyField(Role, through='EventRoles')

    class Meta:
      db_table = "event"
      unique_together = ("date", "department")


class EventId(models.Model):
    event = models.OneToOneField(Event, primary_key=True, related_name='event_number')
    number = models.IntegerField(default=0)

    class Meta:
      db_table = "event_id"

EventId的django rest序列化程序类如下：

class EventIdS(serializers.ModelSerializer):
   class Meta:
    model = EventId

现在，每当我尝试保存新的EventId对象时，代码都会在保存它时失败。例如：

def put(self, request, event_pk, format=None):
    # Get an existing event object 
    event = get_object_or_404(Event, pk=event_pk)

    # Get id number from ajax request
    event_id = request.data.get('id', None)

    if event_id:
      db_data = {
        'event' : event.id,
        'number' : event_id
      }

      idSerial = EventIdS(event, data=db_data)

      if idSerial.is_valid():
        eventID = event.event_number
        eventID.number = event_id
        eventID.save()

代码在eventID.save()失败，我不知道为什么。每当我打印event_id时，它都是一个长数字（例如：12L）。我错过了什么？欢迎任何想法。

Answer 1

您应首先致电.save()而不是idSerial，它会返回eventID更新的实例，然后您可以设置数字属性然后保存。

 idSerial = EventIdS(event, data=db_data)
 if idSerial.is_valid():

    eventID = idSerial.save()
    eventID.number = event_id
    eventID.save()

使用django rest框架无法在一对一关系中保存新对象

1 个答案: