如何在对Django模型进行序列化时删除某些字段？

from rest_framework import serializers
from myapp.models import MyModel

class MyModelSerializer(serializers.ModelSerializer):
    class Meta:
        model = MyModel
        fields = '__all__'  # 包含所有字段

    def to_representation(self, instance):
        # 调用父类的to_representation方法获取默认的表示
        representation = super().to_representation(instance)
        
        # 删除不需要的字段
        del representation['field1']
        del representation['field2']
        
        return representation

from rest_framework import generics
from myapp.models import MyModel
from myapp.serializers import MyModelSerializer

class MyModelListView(generics.ListAPIView):
    queryset = MyModel.objects.all()
    serializer_class = MyModelSerializer