Question

我可以通过重新定义完整的菜单结构来更改活动菜单项在每个函数调用中，例如：

# default.py
def Item1():
    response.menu=[['Item1',True,URL('Item1')],
                  ['Item2',False,URL('Item2')]]
    ...
    return locals()

def Item2():
    response.menu=[['Item1',False,URL('Item1')],
                  ['Item2',True,URL('Item2')]]
    ...
    return locals()

是否有更紧凑的方式，例如 response.menu.activate(item1)要这样做吗？

我可以在参数active_url here上找到备注，但是我不知道如何使用它，找不到语法描述。

编辑：

我可能无法完全理解Anthony的回答，因为我无法运行它。因此，我现在已经以一种非常蛮力的方式修改了代码，以

# menu.py
response.menu=[['Item1',False,URL('Item1')],
               ['Item2',False,URL('Item2')]]


# default.py
def Item1():
    response.menu[0][1]=True
    ...
    return locals()

def Item2():
    response.menu[1][1]=True
    ...
    return locals()

我很确定还有一种我不知道的更优雅的方法。

Answer 1

If you are using the MENU helper, when you call it, you can specify the current URL as the active one:

MENU(response.menu, active_url=URL())

Note, URL() with no arguments returns the part of the URL containing the application, controller, and function for the current request. URL(args=request.args) also includes the current request.args, and finally, URL(args=request.args, vars=request.get_vars) additionally includes the query string of the current request. If your menu item URLs include args or vars, then you will need to pass those as the active_url as well, or there will not be a match.

Alternatively, for each menu item, you can do something like:

current_url = URL(args=request.args, vars=request.vars)
response.menu = [
    ['Item1', URL('item1') == current_url, URL('item1')],
    ['Item2', URL('item2', args='arg1') == current_url, URL('item2', args1='arg1')],
    ...
]

To avoid the redundancy, you could try a helper like:

def menu_item(label, *args, **kwargs):
    url = URL(*args, **kwargs)
    return [label, url == URL(args=request.args, vars=request.get_vars), url]

response.menu = [
    menu_item('Item1', 'item1'),
    menu_item('Item2', 'item2', args='args1'),
    menu_item('Item3', 'item3', args='args1', vars=dict(var1=1))
]

If you don't want to match the query string to determine the active URL, then exclude vars=request.get_vars from the call to URL() in menu_item.

在response.menu中更改活动菜单项

1 个答案: