Re: [Modeling-users] Many-to-many relationship example doesn't work?

[Sebastien B. <sbi...@us...>]

Oh well, sorry, I'm sure it's not the first time it's been 
reported but left uncorrected, isn't it?

co...@sa... wrote:
> 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?

With Erny's correction this should work.

And about CustomObject.editingContext(): it's assigned whenever the object is
inserted or fetched within an EC.

-- Sébastien.


Ernesto Revilla wrote:
> 
> Hi,
> 
> You have to add the instance to both sides of the relation, the
> a.setPerson(p)
> 
> is missing.
> 
> To add an instance to both sides of a relation, you can do also:
> 
> p.addObjectToBothSidesOfRelationshipWithKey(a, ’addresses’)
> 
> Erny
> 
> 
> co...@sa... escribió:
> 
> >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