[Twisted-web] On Flatteners and Adapters

[Pedro Sanchez]

Hello,

I'm trying to implement a menu with the attached code, but it fails with
the following error:

exceptions.NotImplementedError: There is no flattener function
registered for object <Menu object at 0xb76dd42c> of type <class
'Menu'>.

Locals
flattener
None
obj
<Menu object at 0xb76dd42c>
context
WovenContext(tag=Tag('li',
children=[<Menu object at
0xb76dd42c>]))


I'm using http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/286260
as a reference for this sample implementation. The idea is to define two
objects, Menu and MenuItem, and then to define and to register adapters
for each object type.

I don't understand why it complains about flatteners not defined. Isn't
that covered by the registered adapters? I'd appreciate any help.

Thank you,

-- 
Pedro

PS. I test the program running:

$ twistd -noy menu.py


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