如何在django rest框架中更新self.request.user字段？

from rest_framework import serializers

class UserSerializer(serializers.ModelSerializer):
    class Meta:
        model = User
        fields = ['email']

from rest_framework import viewsets

class UserViewSet(viewsets.ModelViewSet):
    serializer_class = UserSerializer

    def get_queryset(self):
        return User.objects.filter(id=self.request.user.id)

    def partial_update(self, request, *args, **kwargs):
        serializer = self.get_serializer(instance=self.request.user, data=request.data, partial=True)
        serializer.is_valid(raise_exception=True)
        serializer.save()
        return Response(serializer.data)