Many-to-many relationship example doesn't work?

Hello,

First of all thanks to Sabastien for his efforts creating this framework.
Projects I'm involved now requires lots of Many-To-Many relations in E-R
model, so I've tried adding methods (for tranparent access to correlation
entity) as described in the example in UsersGuide 2.6.3. But those methods
doesn't work. So I've copy-pasted example from user's guide, but it did'nt
work as well.:
i.e I add methods getAddresses(), addToAddresses()
to the class "Person", Then I try to run a code, that uses those classes:
-------------
#test.py
from Modeling.EditingContext import EditingContext
from MM1 import Person, Address
ec=EditingContext()
p = Person.Person()
a = Address.Address()
p.addToAddresses(a)
ec.insert(p)
ec.insert(a)
ec.saveChanges()
-----------------
I get an error:
Traceback (most recent call last):
  File "./test.py", line 8, in ?
    p.addToAddresses(a)
  File "/tmp/test2/MM1/Person.py", line 76, in addToAddresses
    self.editingContext().insert(_pa)
AttributeError: 'NoneType' object has no attribute 'insert'
-----------------
I've looked into CustomObject.py, and i could'nt find any assigment of
REAL editing, context, only initial definition 'lambda self: None'
Did i misunderstood something, or this example code in User's guide is
just out-dated?

Can someone please give me some guidlines?

I'm using: Python 2.3, Modeling: 0.9-pre-17.1





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