[Zope] What kind of attributes can be put inside a simple item

[Andreas Jung]

--On Freitag, 18. Februar 2005 10:36 Uhr +0100 Marco Bizzarri 
<m.bizzarri at icube.it> wrote:

> Hi all.
>
> I'm little surprised by the possibility to insert non-persistent
> instances inside persistent object. I mean:

Who says that?

>
> class Alfa:
> 	def __init__(self):
> 		self.x = 1
> 		self.y = 2
>
>
> class Beta(SimpleItem):
> 	def __init__(self):
> 		self.id = 'anId'
> 		self.anAlfa = Alfa()

This is working fine.

>
>
> I always understood that I could not put Alfa instances inside a Beta
> class, because the ZODB machinery did not understood how to pickle them.
> But I did some experiments recently, and it looks like the above example
> should work.

The problem with persistent objects is that you should know what you are 
doing if
you use *persistent* objects as attributes.

>
> Could anyone provide some insight on this topic?
>

First tell us what leads you to the *your* opinion.

-aj