Python 带有Django Rest嵌套序列化程序的AttributeError

我遵循Django Rest文档编写嵌套序列化程序，但它给了我属性错误

以下是我的模型：

class Objects(TimeStampModel):
    projects = models.ForeignKey(Projects,related_name='proj_obj',on_delete=models.CASCADE)
    object_name = models.CharField(max_length=50)
    object_description = models.TextField()
    object_main_table = models.CharField(max_length=50)
    object_primary_key = models.CharField(max_length=50)
    object_age_field = models.CharField(max_length=50)
    date_format = models.CharField(max_length=50)

    def __str__(self):
        return self.object_name


class ObjectDefinition(TimeStampModel):
    ATTRIBUTE = 'Attribute'
    RELATION = 'Relation'
    TYPE_CHOICES = (
        (ATTRIBUTE, 'Attribute'),
        (RELATION, 'Relation'),
    )
    obj = models.ForeignKey(Objects,related_name='obj_def',on_delete=models.CASCADE)
    from_table = models.CharField(max_length=50)
    from_table_field = models.CharField(max_length=50)
    to_table = models.CharField(max_length=50)
    to_table_field = models.CharField(max_length=50)
    relation_type = models.CharField(max_length=50,choices=TYPE_CHOICES)
    relation_sequence = models.CharField(max_length=50)
    value_field = models.CharField(max_length=50, blank=True, null=True)

以下是我的serializers.py代码段：

class ObjectDefinitionSerializer(serializers.ModelSerializer):

    class Meta:
        model = ObjectDefinition
        fields = ('from_table','from_table_field','to_table','to_table_field','relation_type','value_field')

class ObjectSerializer(serializers.ModelSerializer):
    definition = ObjectDefinitionSerializer(many=True)
    object_description = serializers.CharField(required=False, allow_null=True, allow_blank=True
        )

    class Meta:
        model = Objects
        fields = ('projects','object_name','object_description','object_main_table','object_primary_key','object_age_field','date_format','definition')

    def validate(self, data, *args, **kwargs):
        date_format = data.get('date_format')
        if date_format not in ['YYYYMMDD', 'DDMMYYYY']:
            msg = ('Date format is incorrect')
            raise serializers.ValidationError({'error_msg': msg})
        return super(ObjectSerializer, self).validate(data, *args, **kwargs)

    def create(self, validated_data):
        definition_data = validated_data.pop('definition')
        obj = Objects.objects.create(**validated_data)
        for data in definition_data:
            ObjectDefinition.objects.create(obj=obj, **data)
        return obj

My views.py：

class CreateObject(CreateAPIView):
    permission_classes = (IsAuthenticated,)
    serializer_class = ObjectSerializer

点击POST后，objects.create对这两个模型都可以正常工作，但在返回obj时，它会抛出以下错误：

异常值：

试图获取序列化程序

ObjectSerializer

上字段

定义的值时，获取了AttributeError。
序列化程序字段的名称可能不正确，并且与
对象
实例上的任何属性或键都不匹配。
原始异常文本为：“对象”对象没有属性“定义”

我遗漏了什么？
ObjectDefinition.obj

的

相关名称是
obj\u def
，与序列化程序不匹配

您可以通过提供源参数来解决此问题：

definition = ObjectDefinitionSerializer(source='obj_def', many=True)

是的，我试过了，但它给了我：异常类型：KeyError异常值：“definition”是的，得到了，需要弹出obj_def而不是definition。现在工作。因此，如果指定了相关的名称字段，则需要源属性！谢谢你的帮助。：）