[Zope] Multilingual content class with LocalPropertyManager

[Dragos Chirila]

Hi

I want to build a multilingual content class with LocalPropertyManager 
from the Localizer product. Also, my class extends the File class, 
something like:


class MClass(LocalPropertyManager, File):

     title = LocalProperty('title')
     description = LocalProperty('description')

     def __init__(self, id, title, description, file, precondition, 
content_type, lang):
         File.__dict__['__init__'](self, id, title, file, content_type, 
precondition)
         self._setLocalPropValue('title', lang, title)
         self._setLocalPropValue('description', lang, description)


The problem is that everytime I call the title property it doesn't 
return the LocalProperty 'title', but instead it returns the value 
entered when the object was created.

 From a ZPT, if lang is the current selected language and is 'en':

	<span tal:replace="here/title" /> - don't get the correct value for the 
selected language

	<span tal:replace="python:here.getLocalProperty('title', lang)" /> - 
correct value

Not event after editing the object properties, the 'title' value remains 
the same: the value entered when the object was created.

I tried not to call the File constructor, but it doesn't work also. My 
LocalProperty 'title' is somehow 'hidden'.

Could you please give me some indications about what am I doing wrong? 
Is there another way to have a class like MClass?

Thanks a lot,
Dragos