filters.py 文件源码

def ifusergroup(parser, token):
    """ Check to see if the currently logged in user belongs to one or more groups
    Requires the Django authentication contrib app and middleware.

    Usage: {% ifusergroup Admins %} ... {% endifusergroup %}, or
           {% ifusergroup Admins Clients Programmers Managers %} ... {% else %} ... {% endifusergroup %}

    """
    try:
        tokens = token.split_contents()
        groups = []
        groups += tokens[1:]
    except ValueError:
        raise template.TemplateSyntaxError("Tag 'ifusergroup' requires at least 1 argument.")

    nodelist_true = parser.parse(('else', 'endifusergroup'))
    token = parser.next_token()

    if token.contents == 'else':
        nodelist_false = parser.parse(('endifusergroup',))
        parser.delete_first_token()
    else:
        nodelist_false = template.NodeList()

    return GroupCheckNode(groups, nodelist_true, nodelist_false)