Python 无法插入Django建模

我的输入是使用JSON POST请求

{
  "rawdata": [
    {
      "id": "89729999",
      "name": "testname",
      "product": "testproduct",
      "modified_at": "2023-12-14T03:00:00.000Z",
      "modified_by": "personname",
      "asset": {
        "configname": ["testconfig"],
        "serialnumber": ["testserialnumber"],
        "owner": ["owner1","owner2"]
      }
    }
  ]
}

model.py

class Host(models.Model):
    id                = models.CharField(primary_key=True, max_length=15)
    name              = models.CharField(max_length=80)
    product           = models.CharField(max_length=50)
    modified_at       = models.DateTimeField()
    modified_by       = models.CharField(max_length=50)

class Hostinfo(models.Model):
    fk                = models.ForeignKey(Host, on_delete=models.CASCADE) ## id 
    parameter_section = models.CharField(max_length=40)
    parameter         = models.CharField(max_length=80)
    parameter_index   = models.IntegerField()  ## index 
    value             = models.CharField(max_length=200, null=True)
    modified_at       = models.DateTimeField()
    modified_by       = models.CharField(max_length=50)

View.py

@api_view(('POST',))
def hostrequest(request):
    data=request.data.get('rawdata')
    print(data) 
    try:   
        for item in data:
            host=Host()
            host.cmdbid = item['id']
            host.name = item['name']
            host.product =item['product']
            host.modified_at= item['modified_at']
            host.modified_by= item['modified_by']
            host.save()
            hostparameter = Hostinfo()
           for parameter_section in item:
                if parameter_section != "id" and parameter_section != "name" and parameter_section != "product" and parameter_section != "modified_at" and parameter_section != "modified_by":
                    detailData = item[parameter_section]
                    for parameter in detailData:
                        parameters = detailData[parameter]
                        for parameter_index in parameters:
                            value = parameters[parameter_index]
                            hostparameter.fk += item['id']
                            hostparameter.parameter_section += parameter_section['parameter_section']
                            hostparameter.parameter += parameter['parameter']
                            hostparameter.parameter_index += parameter_index['parameter_index']
                            hostparameter.value += value['value']
                            hostparameter.save()
            response_data={"error":False,"Message":"Updated Successfully"}
            return JsonResponse(response_data,safe=False,status=status.HTTP_201_CREATED)
    except:
        response_data={"error":True,"Message":"Failed to Update Data"}
        return JsonResponse(response_data,safe=False)

i executed view script without any issue but i'm only able insert value into host. But not able insert into Hostinfo.
Anyone could help on this why i not able insert into Hostinfo. Any issue on this script on View.py ?

HostInfo表的最终输出

[Output of scripts]1