def __getattr__(self, name):
    """
    Deploys dynamic methods for on-demand thumbnails creation with any
    size.

    Syntax::

        get_photo_[WIDTH]x[HEIGHT]_[METHOD]

    Where *WIDTH* and *HEIGHT* are the pixels of the new thumbnail and
    *METHOD* can be ``url`` or ``filename``.

    Example usage::

        >>> photo = Photo(photo="/tmp/example.jpg", ...)
        >>> photo.save()
        >>> photo.get_photo_320x240_url()
        u"http://media.example.net/photos/2008/02/26/example_320x240.jpg"
        >>> photo.get_photo_320x240_filename()
        u"/srv/media/photos/2008/02/26/example_320x240.jpg"
    """
    match = re.match(GET_THUMB_PATTERN, name)
    if match is None:
        raise AttributeError, name
    width, height, method = match.groups()
    size = int(width), int(height)

    def get_photo_thumbnail_filename():
        file, ext = path.splitext(self.photo.file.name)
        return file + '_%sx%s' % size + ext

    def get_photo_thumbnail_url():
        url, ext = path.splitext(self.photo.url)
        return url + '_%sx%s' % size + ext

    thumbnail = get_photo_thumbnail_filename()
    if not path.exists(thumbnail):
        img = Image.open(self.photo.file.name)
        img.thumbnail(size, Image.ANTIALIAS)
        img.save(thumbnail)
    if method == "url":
        return get_photo_thumbnail_url
    else:
        return get_photo_thumbnail_filename