DRF:如何创建序列化程序，该序列化程序使用字段来搜索数据库中是否存在具有给定ID的对象，如果存在，则将该对象用作外键

from rest_framework import serializers
from .models import YourModel

class YourSerializer(serializers.ModelSerializer):
    class Meta:
        model = YourModel
        fields = '__all__'

class YourSerializer(serializers.ModelSerializer):
    your_foreign_key = serializers.PrimaryKeyRelatedField(queryset=YourModel.objects.all())

    class Meta:
        model = YourModel
        fields = '__all__'

from rest_framework.views import APIView
from rest_framework.response import Response

class YourView(APIView):
    def get(self, request):
        your_objects = YourModel.objects.all()
        serializer = YourSerializer(your_objects, many=True)
        return Response(serializer.data)