当覆盖create()时，如何在DRF ModelViewSet上执行get_or_create？

from rest_framework import viewsets

from .serializers import YourSerializer
from .models import YourModel

class YourViewSet(viewsets.ModelViewSet):
    serializer_class = YourSerializer
    queryset = YourModel.objects.all()

    def create(self, request, *args, **kwargs):
        serializer = self.get_serializer(data=request.data)
        serializer.is_valid(raise_exception=True)
        validated_data = serializer.validated_data

        # 获取模型类
        model_class = serializer.Meta.model

        # 获取需要匹配的字段和对应的值
        lookup_fields = {'field1': validated_data['field1'], 'field2': validated_data['field2']}

        # 查找或创建对象
        obj, created = model_class.objects.get_or_create(**lookup_fields)

        # 执行序列化操作
        serialized_obj = self.get_serializer(obj)

        return Response(serialized_obj.data)