ZClass problem in 2.8 (Was: Re: [Zope-dev] Upcoming Zope 2.8 release)

[John Barratt]

Andreas Jung wrote:
> <dieter at handshake.de> wrote:
>> What about the ZClasses?
> Jim fixed them (hopefully :-))

They don't work for me in 2.8... :-(

I can't shake a new permission problem when trying to add a ZClass 
instance in 2.8b2.  This is a 2.8 specific problem as the same process 
works in 2.7.6.  For reference, the recently enabled tests for ZClasses 
all pass fine.  This is a problem wether python or C security control is 
enabled via zope.conf.  Also this was always tried with a 'fresh' ZODB.

 From a bit of digging through the code it seems there is a difference 
comes about in the call on line 166 of AccessControl.User inside 
_check_context :

     return object.aq_inContextOf(context, 1)

In Zope 2.8 it returns 0, in 2.76 it returns 1 with the steps below.  I 
don't know how to even start to try to debug inside this C based method?

Below are the steps I used to reproduce this problem.  This was on a 
Fedora Core 3 x86_64 server with a fresh Zope & Python compile :

- Open the ZMI and login as a user with 'Manager' permissions.
- Goto : /Control_Panel/Products/
- Add a new Product 'AAA'
- Go to the Product : /Control_Panel/Products/AAA/
- Add a new 'Z Class' :
	id=ZZZ
	title=ZZZ
	meta type=ZZZ
	'Create Constructor objects' checked
	'Included standard Zope persistent object base classes' checked.

- Goto the Root Folder
- Goto the Security Tab
- Give 'Manager' permission to 'Add ZZZs'
- Goto the Root Folder
- Try to add an instance of a 'ZZZ':
	- Zope 2.7.6 succeeds no problem.
	- Zope 2.8.0-b2 (and b1) you get a http auth login form come up.
	- You get the same behaviours with Python 2.3.5 and 2.4.1.

I also tried a quick hack to make the above method always return 1 in 
Zope 2.8, but another error is then encountered whilst trying to add the 
ZClass instance :

     * Module ZPublisher.Publish, line 187, in publish_module_standard
     * Module ZPublisher.Publish, line 144, in publish
     * Module ZPublisher.Publish, line 107, in publish
     * Module Zope2.App.startup, line 248, in recordMetaData
     * Module OFS.Traversable, line 104, in getPhysicalPath
     * Module App.FactoryDispatcher, line 90, in __getattr__

AttributeError: getPhysicalPath

I didn't see anything different you 'need' to do with 2.8 WRT ZClasses 
for this to work, but I suppose I could have missed something!  One 
other note is that I have also only been able to try this on 64 bit 
platforms (Solaris 10 and FC3 as above).

Thanks for any help.  I hope this can be resolved before 2.8 goes final!

JB.