Django rest framework: Insert multiple objects in one post request

I am using DRF for my API backend. I need to insert multiple objects into one post request. I saw so many tutorials, as well How do I create multiple model instances with Django Rest Framework?, but not success. I am using ModelSerializer, but when using many=True then have problem with ListSerializer.

views.py

class SaleUserViewSet(ModelViewSet):
    queryset = SaleUser.objects.all()
    serializer_class = SaleUserSerializer(many=True)

serlializers.py

class SaleUserSerializer(serializers.ModelSerializer):

    class Meta:
        model = SaleUser
        fields = ('id', 'comment', 'creation_date', 'modification_date', 'last_user', 'user', 'sale', 'user_sale_type')

error message

AttributeError at /api/sale_user/ type object 'Meta' has no attribute 'model'

Please advise.