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": "gi...@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)