How to get ListField(child=serializer.DictField())

[김도오]

i don't know what to do

error:
assert not inspect.isclass(self.child), '`child` has not been instantiated.'
AssertionError: `child` has not been instantiated.



i got the data and want to make Owner and Manager data and connect M2M 
between Owner and Manager by OwnerCreateSerializer

Please Help Me!!!!

data = {
  "managers": [
     {
       "name": "react",
       "department": "develop",
       "position": "PM",
       "phone_number": "01022145512",
       "email": "s...@gmail.com"
     },
     {
       "name": "ajax",
       "department": "market",
       "position": "engineer",
       "phone_number": "01032145567",
       "email": "g...@gmail.com"
     }
  ],
  "business_license_number": "asdsasasssdsa",
  "business_store_type": "online",
  "business_condition": "service",
  "joined_date": "2021-02-02",
  "business_classification": "personal",
  "business_name": "doldam",
  "business_main_item": "food",
  "application_route": "0001",
  "sales_channel": "0",
  "transaction_amount": null,
  "past_pg_company": "",
  "business_official_address": "",
  "business_real_address": "",
  "initial_registration_fee": 0,
  "annual_management_fee": 0,
  "guarantee_insurance_policy": true,
  "contact_receipt": false,
  "contact_current_status": "ct_consult",
  "contact_type": "normal"
}
-------------------------------------------------------------------
models.py
class Owner(models.Model):
       joined_date = models.DateField("접수일", auto_now_add=True)
       business_classification = models.CharField("사업체구분", max_length=100)
       business_name = models.CharField("상호명", max_length=100)
       business_main_item = models.CharField('주요판매물품', max_length=100)
       application_route = models.CharField("접수경로", max_length=100, )
       sales_channel = models.CharField("영업채널", max_length=100, blank=True)


class Manager(models.Model):
      
         owners = models.ManyToManyField(Owner, related_name='managers', 
blank=True, help_text='사업자등록')
        name = models.CharField('담당자이름', max_length=100)
        department = models.CharField('담당자부서', max_length=100)
        position = models.CharField('담당자직책', max_length=100)
        phone_number = models.CharField('담당자핸드폰번호', max_length=100, )
        email = models.EmailField("담당자_EMAIL", max_length=255)




-------------------------------------------------------------------

serializers.py

class OwnerCreateSerializer(ModelSerializer):
  managers = serializers.ListField(
      child=serializers.DictField()
  )
  class Meta:
    model = Owner
    fields = '__all__'

  def create(self, validated_data):
    managers = validated_data.pop('managers', None)
    owner = super().create(validated_data)
    managers_serializer=
        ManagerSerializer(data=managers,many=True)
        if managers_serializer.is_valid():
            managers_serializer.save(owner)
    return owner 

-------------------------------------------------------------------

views.py

class OwnerListCreate(APIView):
  def post(self, request):
    owner_serializer = OwnerCreateSerializer(data=request.data)
    if owner_serializer.is_valid():
      owner_serializer.save()
      return Response(owner_serializer.data)
    





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