我正在努力使用SlugRelatedField设置PrimaryKeyRelatedField。使用Django Rest框架反序列化ForeignKey上的SlugRelatedField
我的models.py的样子:
class Airport(models.Model):
name = models.CharField(max_length=200, blank=True)
iata = models.CharField(max_length=20, blank=True)
<other unrelated fields>
class Flight(models.Model):
flight_number = models.CharField(max_length=25, blank=False, unique=True)
origin = models.ForeignKey(Airport, related_name='origin', null=True)
destination = models.ForeignKey(Airport, related_name='destination', null=True)
scheduled_departure = models.DateTimeField(null=True)
scheduled_arrival = models.DateTimeField(null=True)
我的看法是这样的:
class FlightList(APIView):
# List all flights, or create a new flight
queryset = Flight.objects.all()
serializer_class = FlightSerializer
def get(self, request, format=None):
flights = Flight.objects.all()
serializer = FlightSerializer(flights, many=True)
return Response(serializer.data)
def post(self, request, format=None):
serializer = FlightSerializer(data=request.data)
if serializer.is_valid():
serializer.save()
print serializer.validated_data
return Response(serializer.data, status=status.HTTP_201_CREATED)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
如果我将serializers.py设置为:
class FlightSerializer(serializers.ModelSerializer):
class Meta:
model = Flight
fields = ('flight_number', 'origin', 'destination', 'scheduled_departure', 'scheduled_arrival')
从贝我看串行器呈现为:
FlightSerializer():
flight_number = CharField(max_length=25, validators=[<UniqueValidator(queryset=Flight.objects.all())>])
origin = PrimaryKeyRelatedField(allow_null=True, queryset=Airport.objects.all(), required=False)
destination = PrimaryKeyRelatedField(allow_null=True, queryset=Airport.objects.all(), required=False)
scheduled_departure = DateTimeField(allow_null=True, required=False)
scheduled_arrival = DateTimeField(allow_null=True, required=False)
我能够发布与数据库中的机场条目相匹配的原产地和目的地包,以创建新的航班。大。
但是,实际上我需要发布机场代码(即LAX)作为出发地或目的地,并让DRF计算出适当的实例。
我认为这样做的方法是使用SlugRelatedField。尽管付出了最大的努力,但我无法正确设置它。
我想设置serializers.py这样的:
class FlightSerializer(serializers.ModelSerializer):
origin = serializers.SlugRelatedField(
many=True,
read_only=True,
slug_field='iata',
)
class Meta:
model = Flight
fields = ('flight_number', 'origin', 'destination', 'scheduled_departure', 'scheduled_arrival')
当我传递了一个有效的机场代码(IATA)像KMS为原点似乎被忽略。
这是什么SlugRelatedField应该用于?
我做错了什么让我的POST发送一个字符串,让DRF看一个匹配数据库条目的字段,并将其存储为与我仅仅传递一个有效的PK时一样精美?