Hi,
We ran into a rights problem, which might be the result of ignorance, but could
also be caused by a perceptual omission in the rights model. The following
happened:
1. created space, with explicit rights on group 'GroupA' (this automatically
locks out users who are not a member of this group) => ok
2. create/edit a page as user 'UserA', member of 'GroupA' => ok
3. UserA (owner/creator of the document) grants view rights to user 'UserB',
NOT in GroupA => problems!
Now the creator/owner of the document (UserA) can NOT view his own document
anymore! Same for problem for every other user in 'GroupA'.
I figured that this is correct from a certain point of view: an explicit view
for a specific user locks out all other users, but that includes the owner and
all other users, including those in 'GroupA', with correct rights at the space
level.
A possible solution is to grant GroupA explicitly at the same time you grant a
specific user access to a certain page, but people will forget to do so.
My question is: did we do anything wrong, and is it possible to manage the
rights in a way that prevents this counter-intuitive behaviour?
I have the feeling that the rights model lacks real-inheritance: when checking
permissions for a user, it should return the permissions including that of the
group as if it were his explicit permissions, also for pages that inherit
rights from the space. E.g.
hasView('UserA') should always return 'True' when the group he belongs to has
view rights at the space level.
Now it apparently returns 'False' when there is an implicit override by
granting a user view rights. Or does inheritance from the space levels stops
working as soon as there's any kind of override on a specific page?
A possible but crude work-around could be using some intelligent trigger
functions in the database to explicitly add all rights from the space to the
specific document as soon as an XWikiRights object is written, but that's kind
of a last resort.
Could you help me? I hope for a better solution!
Thanks,
Wouter
Wouter Boasson (MSc)
Geo-IT Research and Coordination
RIVM - National Institute for Public Health and the Environment
Expertise Centre for Methodology and Information Services
Contact information
-----------------------
RIVM
VenZ/EMI, Pb 86
t.a.v. dhr. Drs. Wouter Boasson
Postbus 1
3720 BA Bilthoven
T +31(0)302748518
F +31(0)302744456
E [email protected]
mo - th
Disclaimer RIVM
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