api.py 文件源码

def generate_valid_slug(source, parent, language):
    """
    Generate a valid slug for a page from source for the given language.
    Parent is passed so we can make sure the slug is unique for this level in
    the page tree.
    """
    if parent:
        qs = Title.objects.filter(language=language, page__parent=parent)
    else:
        qs = Title.objects.filter(language=language, page__parent__isnull=True)
    used = list(qs.values_list('slug', flat=True))
    baseslug = slugify(source)
    slug = baseslug
    i = 1
    if used:
        while slug in used:
            slug = '%s-%s' % (baseslug, i)
            i += 1
    return slug