如何显示外键值而不是 id？

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"

序列化程序如下：

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。当我创建一个 API 时，我得到的响应是字段的 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。

我用过source='TailNumber.number'。请用右边的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

您可以像添加属性一样简单地添加它们。

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']

否则你可以看看nested relationships in DRF，它也可以提供更多的可能性。

Answer 3

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

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

如果用户是外键或多对多键，序列化程序会将用户显示为对象而不是键。

The depth option should be set to an integer value that indicates the depth of relationships that should be traversed before reverting to a flat representation.

如何显示外键值而不是 id？

How to display a foreign key value instead of the id?

python

django

django-serializer

django-rest-framework