book_slugs = models.TextField(_('book slugs'))
kind = models.CharField(_('kind'), max_length=10, blank=False, default='book', db_index=True,
choices=(('book', _('book')), ('picture', _('picture'))))
+ listed = models.BooleanField(_('listed'), default=True, db_index=True)
role = models.CharField(max_length=128, blank=True, db_index=True, choices=[
('', '–'),
('recommend', _('recommended')),