如何在Django Rest框架中定制ManyToMany字段的更新方法

from rest_framework import serializers

class CustomSerializer(serializers.ModelSerializer):
    m2m_field = serializers.PrimaryKeyRelatedField(queryset=RelatedModel.objects.all(), many=True)

    class Meta:
        model = YourModel
        fields = '__all__'

    def update(self, instance, validated_data):
        m2m_data = validated_data.pop('m2m_field', None)
        instance = super().update(instance, validated_data)
        
        if m2m_data is not None:
            instance.m2m_field.set(m2m_data)
        
        return instance

from rest_framework import viewsets

class YourModelViewSet(viewsets.ModelViewSet):
    serializer_class = CustomSerializer
    queryset = YourModel.objects.all()