[z3-five] Re: Five fails on my 2.8 instance

[Philipp von Weitershausen]

Tim Hicks wrote:
> Hi,
> 
> I'm trying to install Five in a Zope 2.8 instance but get problems on
> initialization of Five.  I'm afraid I don't understand enough of what's
> happening to figure out what's going wrong or how to fix it.  Can anyone
> else see the problem?
> 
> See traceback below.  I'm using Zope X3 3.0.0 final in case that makes any
> difference.

Five currently only works with Zope 2.7 and X3.0.0. It does not work 
with Zope 2.8 which changes certain subtleties regarding the ZODB packages.
The reason is that Zope 2.7 is stable and in production. It's what most 
people use. 2.8 is not on anyone's radar yet...

>     class ISimpleItem(IItem, IPersistent, IAcquisition, IRoleManager):
>   File "/home/tim/zope/X3-3.0.0/lib/python/zope/interface/interface.py",
> line 416, in __init__
>     raise TypeError, 'Expected base interfaces'
> TypeError: Expected base interfaces

Yes, this makes sense because in Zope 2.8, the IPersistent interface is 
an Interface.Interface (old-style) whereas in Zope 2.7, it is a 
zope.interface.Interface (new-style). Once we support Zope 2.8, we'll 
have to think about what to do with that.

Philipp