Users instead id , Django(wagtail) , Vue

Question

I want to make a class that returns usename of all users who liked the post. Users will be sent to Vue. currently the code returns in Vue consol log - 0: {likex: 'ideas.IdeaPage.None'}

models.py

class IdeaPage(Page):
    intro = models.CharField(max_length=250)
    body = RichTextField()
    tags = models.CharField(max_length=100, null=True, blank=True)
    likex = models.ManyToManyField(User, related_name="likex", blank=True)

serializer.py

class LikeSerializer(serializers.ModelSerializer):
    likex = serializers.CharField()
    
    class Meta:
        model = IdeaPage
        fields = ["likex"]

views.py

@authentication_classes([authentication.TokenAuthentication])
@permission_classes([permissions.IsAuthenticated])
class Like(APIView):
    
    def get(self, request, id, format=None):
        ideasl = IdeaPage.objects.get(id=id)
        likepost = IdeaPage.objects.get(id=id)
        likepostZ = likepost.likex.all()
        if request.user in likepost.likex.get_queryset():
            likepost.likex.remove(request.user)
        else:
            likepost.likex.add(request.user)

        serializer = LikeSerializer(likepostZ, many=True)

        return Response(serializer.data)

why code return likex: 'ideas.IdeaPage.None'?