def api_comments(*, page='1'):
    page_index = get_page_index(page)
    num = yield from Comment.findNumber('count(id)')
    p = Page(num, page_index)
    if num == 0:
        return dict(page=p, comments=())
    comments = yield from Comment.findAll(orderBy='created_at desc', limit=(p.offset, p.limit))
    return dict(page=p, comments=comments)