Django matching query does not exist after object save in Celery task

I have the following code:

@task()
def handle_upload(title, temp_file, user_id):
    .
    .
    .
    photo.save()
    #if i insert here "photo2 = Photo.objects.get(pk=photo.pk)" it works, including the         view function
    return photo.pk

#view function
def upload_status(request):
    task_id = request.POST['task_id']

    async_result = AsyncResult(task_id)
    photo_id = async_result.get()
    if async_result.successful(): 
        photo = Photo.objects.get(pk=photo_id)

I use an ajax request to check for the uploaded file but after the celery task finishes i get a Photo matching query does not exist. The photo pk does exist and gets returned. If i query the database manually it works. Is this some sort of database lag? How can I fix it? I'm using Django 1.4 and Celery 3.0