part_name = models.CharField(_('part name'), default='', blank=True, max_length=512)
index = models.IntegerField(_('index'), default=0)
file = models.FileField(_('file'), max_length=600, upload_to=_file_upload_to, storage=OverwriteStorage())
part_name = models.CharField(_('part name'), default='', blank=True, max_length=512)
index = models.IntegerField(_('index'), default=0)
file = models.FileField(_('file'), max_length=600, upload_to=_file_upload_to, storage=OverwriteStorage())