我正在使用Django REST Framework，在将数据插入子表时遇到了一个问题。有两个名为Card和ContactName的模型，它们具有以下字段。Card通过外键字段名card与ContactName有关系。
models.py：

class Card(models.Model):
    image = models.ImageField(upload_to='images', max_length=255, null=True, blank=True)
    filename = models.CharField(max_length=255, null=True, blank=True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    def __str__(self):
        return self.filename

class ContactName(models.Model):
    first_name = models.CharField(max_length=255, null=True, blank=True)
    last_name = models.CharField(max_length=255, null=True, blank=True)
    confidence = models.FloatField(default=0)
    card = models.ForeignKey(Card, on_delete=models.CASCADE, related_name='contact_name')
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    def __str__(self):
        return self.first_name

serializers.py文件：

class ContactNameSerializer(serializers.ModelSerializer):
    class Meta:
        model = ContactName
        fields = ['id', 'first_name', 'last_name', 'confidence', 'card', 'created_at', 'updated_at']

class CardSerializer(serializers.ModelSerializer):
    contact_name = ContactNameSerializer(many=True, read_only=True)
    class Meta:
        model = Card
        fields = ['id', 'image', 'filename', 'contact_name', 'created_at', 'updated_at']

在ViewSet中，一旦创建了卡记录，我还想将以下ContactNameJSON数据添加到子表中，将reference （card_id） 设置为该卡的id，并在响应中返回新添加的记录。
e.g.

[
  {
    "first_name": "John",
    "last_name": "Doe",
    "confidence": 0.9
  },
  {
    "first_name": "Doe",
    "last_name": "John",
    "confidence": 0.5
  }
]

views.py：

class CardViewSet(viewsets.ModelViewSet):
    parser_classes = (MultiPartParser, FormParser)

    queryset = Card.objects.all()
    serializer_class = CardSerializer

    def create(self, request):
        cards_serializer = CardSerializer(data=request.data)
        if cards_serializer.is_valid():
            cards_serializer.save()

            # insert the record into the child table and set the reference (card_id) as an id
            json = [
                {
                    "first_name": "John",
                    "last_name": "Doe",
                    "confidence": 0.9
                },
                {
                    "first_name": "Doe",
                    "last_name": "John",
                    "confidence": 0.5
                }
            ]

            return Response(cards_serializer.data, status=status.HTTP_201_CREATED)
        else:
            return Response(cards_serializer.errors, status=status.HTTP_400_BAD_REQUEST)

我真的很感激你的帮助。最后的回复会是这样的：

{
  "id": 10,
  "image": "/media/abc.jpg",
  "filename": "abc.jpg",
  "contact_names": [
    {
      "id": 1,
      "first_name": "John",
      "last_name": "Doe",
      "confidence": 0.9,
      "card_id": 10
    },
    {
      "id": 2,
      "first_name": "Doe",
      "last_name": "John",
      "confidence": 0.5,
      "card_id": 10
    }
  ]
}