将数据从post传递给Serializer

Question

我有一些数据{iddepart，idarrivee}用于序列化程序。此数据不存在于数据模型中，但在内部用于计算某些字段：

这是我的代码，我得到错误：字段'iddepart'在序列化程序ReservationSerializer上声明，但未包含在'fields'选项中。

class TravelViewReserveSet(mixins.RetrieveModelMixin,
                 mixins.ListModelMixin,
                 mixins.DestroyModelMixin,
                 mixins.CreateModelMixin,
                 viewsets.GenericViewSet):

    serializer_class = ReservationSerializer
    permission_classes = (permissions.IsAuthenticated,)

    Model = Travel

和序列化器：

class ReservationSerializer(serializers.ModelSerializer):
    user = serializers.PrimaryKeyRelatedField(read_only=True, default=serializers.CurrentUserDefault())
    #user = UserSerializer()
    #travel = TravelSerializer()

    iddepart = serializers.SerializerMethodField('iddepart')
    idarrivee = serializers.SerializerMethodField('idarrivee')

    def create(self, validated_data):
        #code=  random_generator()        
        ##code = random_generator()

        reservation = Reservation(**validated_data)
        reservation.code = random_generator() 
        reservation.save()
        #iddepart =  validated_data['iddepart']
        #idarrivee = validated_data['idarrivee']

class Meta:
    model = Reservation
    fields = ('id','reservedplaces','code','datecreation','travel','user')

Answer 1

试试这个

def create(self, validated_data):
    iddepart = validated_data.pop('iddepart','default value')
    idarrivee = validated_data.pop('idarrivee', 'default value')
    # do somthing with this data


    #code=  random_generator()
    ##code = random_generator()

    reservation = Reservation(**validated_data)
    reservation.code = random_generator()
    reservation.save()
    #iddepart =  validated_data['iddepart']
    #idarrivee = validated_data['idarrivee']

Answer 2

您需要将iddepart和idarrivee添加到Meta中的fields选项。

你的Meta应该是这样的，

class Meta:
    model = Reservation
    fields = ('id','reservedplaces','code','datecreation','travel','user',
             'iddepart','idarrivee')