如何从嵌套表示Django中排除字段？

from django.db import models

class ParentModel(models.Model):
    name = models.CharField(max_length=100)
    age = models.IntegerField()
    # ...

class ChildModel(models.Model):
    parent = models.ForeignKey(ParentModel, on_delete=models.CASCADE)
    child_name = models.CharField(max_length=100)
    # ...

from rest_framework import serializers

class ChildModelSerializer(serializers.ModelSerializer):
    class Meta:
        model = ChildModel
        fields = '__all__'

class ParentModelSerializer(serializers.ModelSerializer):
    children = ChildModelSerializer(many=True, read_only=True)

    class Meta:
        model = ParentModel
        exclude = ('age',)  # 排除age字段

from rest_framework import generics

class ParentModelListView(generics.ListAPIView):
    queryset = ParentModel.objects.all()
    serializer_class = ParentModelSerializer