[Zope3-Users] Programmatically changing GroupInformation.principals

[Andreas Elvers]

Hi,

I'm trying to change GroupInformation.principals inside my application, 
but I'm getting PrincipalLookupErrors. Here's a demo:

The Demo is a folder with a Site that contains a PAU with one principal 
Mr. Test and a group called testgroup. Mr. Test is member of testgroup.

First we setup the demo in ZMI (taking a *deep* breath):

- create a folder 'Test'
- enter Test
- Make Site
- enter Test/++etc++site/default

- create PluggableAuthentication utility with Prefix = pauprefix.
- click register
- click add

- create PrincipalFolder with prefix = principal.
- click register
- Register as principalfolder and add
- add a PrincipalInformation: login = testuser, password=pass, title=Mr. 
Test

- go back to pau folder and add a GroupFolder prefix=group.
- register as groupfolder
- add a group: title=testgroup

- go back to pau folder and add groupfolder and principalfolder in 
Authenticator Plugins. Click change.

- from the navtree choose the groupfolder that resides in our pau folder.
- click on group 1 (this is actually the testgroup. Why using numbers ?)
- Under the headline "Principal Folder" click on Search.
- Select Mr. Test and click Apply.
- Now click Change at the bottom of the page.

Now stop zope and run debugzope.

# getting pau
 >>> pau = 
app.root()['Test'].getSiteManager()['default']['PluggableAuthentication']
 >>> group = pau['GroupFolder']['1']
 >>> group.principals
('pauprefix.principal.1',)

Now: Why does this not work ?

 >>> group.principals = ('pauprefix.principal.1',)
Traceback (most recent call last): ...
   File 
"/usr/local/zope-3.2.0/lib/python/zope/app/security/principalregistry.py", 
line 75, in getPrincipal
     raise PrincipalLookupError(id)
zope.app.security.interfaces.PrincipalLookupError: 'pauprefix.principal.1'

Thanks for your help.
- Andreas