Question

我有以下型号：

class FlightSchedule(models.Model):
    tail_number = models.ForeignKey(TailNumber, null=False)
    flight_number = models.CharField(max_length=30, null=False)
    flight_group_code = models.ForeignKey(FlightGroup, null=False)
    origin_port_code = models.ForeignKey(Port, null=False, related_name="Origin")
    destination_port_code = models.ForeignKey(Port, null=False, related_name="Destination")
    flight_departure_time = models.TimeField()
    start_date = models.DateField()
    end_date = models.DateField()

def __unicode__(self):
    return u'%s' % self.flight_number

class Meta:
    verbose_name_plural = "Flight Schedule"


class FlightScheduleDetail(models.Model):
    flight_date = models.CharField(max_length=30, null=False)
    flight_number = models.ForeignKey(FlightSchedule, null=False, related_name="flight_number_schedule")
    route_id = models.CharField(max_length=30, null=False, unique=True)
    flight_status = models.ForeignKey(Status, null=True, default=1)

def __unicode__(self):
    return u'%s' % self.route_id

class Meta:
    verbose_name_plural = "Flight Schedule Details"

，序列化器如下：

class FlightScheduleDetailSerializer(serializers.ModelSerializer):
    class Meta:
        model = FlightScheduleDetail
        fields = '__all__'


class FlightScheduleSerializer(serializers.ModelSerializer):
    flight_number_schedule = FlightScheduleDetailSerializer(many=True)

    class Meta:
        model = FlightSchedule
        fields = ['tail_number', 'flight_number', 'origin_port_code', 'destination_port_code', 'flight_departure_time',
              'flight_number_schedule']

这里tail_number，flight_number是外键。当我创建API时，我将响应作为字段的id。如何在json中显示名称？

我的views.py如下：

@api_view(['GET'])
def flight_schedule(request):
    schedule = FlightSchedule.objects.all()
    serializer = FlightScheduleSerializer(schedule, many=True)
    return Response(serializer.data)

Answer 1

您可以在序列化程序中使用field_name定义源，如下所示。

我使用过source='TailNumber.number'。请使用正确的field_name代替number

class UserProfileSerializer(serializers.ModelSerializer):
    tail_number = serializers.CharField(source='TailNumber.number', read_only=True)
    flight_number = ....(change as above)

    class Meta:
        model = FlightSchedule
        fields = ['tail_number', 'flight_number', 'origin_port_code', 'destination_port_code', 'flight_departure_time',
          'flight_number_schedule']

Answer 2

您可以简单地将它们添加为属性。

flight_number_str = serializers.ReadOnlyField(source='flight_number.flight_number')

首先flight_number是FlightScheduleDetail的属性，然后是FlightSchedule

的属性

然后将其添加到字段列表fields = [..., 'flight_number_str']

否则，您可以查看DRF中的nested relationships，它也可以提供更多可能性。

Answer 3

另一种方法是在序列化程序中使用depth选项。它是指定嵌套序列化 - doc

class AccountSerializer(serializers.ModelSerializer):
    class Meta:
        model = Account
        fields = ('id', 'account_name', 'users', 'created')
        depth = 1

如果用户是外键或许多键，则序列化程序会将用户显示为对象而不是键。

depth选项应设置为指示的整数值在恢复之前应该遍历的关系深度平面代表。

如何显示外键值而不是id？

3 个答案: