why does photo.file.name contain local path?

[zzm88]

jfu - views.py
why after instance.save(), instance.name becomes sth like "C:/foo/bar.jpg" what if I need only "bar.jpg"? I tried to change it but after instance.save() it goes back again.

I need it to be a "bar.jpg" because I want to handle it with easythumb

@require_POST
def upload( request,topic_id = ''):
    if topic_id  == '':
        pass
    else:
        t = topic.objects.get(id = topic_id)
        if t.picture != None:
            return None

    # The assumption here is that jQuery File Upload
    # has been configured to send files one at a time.
    # If multiple files can be uploaded simulatenously,
    # 'file' may be a list of files.
    file = upload_receive( request )


    instance = Photo( file = file )
    
    instance.slug = os.path.basename(instance.file.name)
    instance.file.name = os.path.basename(instance.file.name)
    instance.save()


    try:
        t.picture = instance
        t.save()
    except:
        pass

    basename = os.path.basename( instance.file.path )

    file_dict = {
        'name' : basename,
        'size' : file.size,

        'url': settings.MEDIA_URL + basename,
        'thumbnailUrl': settings.MEDIA_URL + basename,

        # 'deleteUrl': reverse('jfu_delete', kwargs = { 'pk': instance.pk }),
        # 'deleteType': 'POST',
    }

    return UploadResponse( request, file_dict )