Re: [Zope] Deleted users still have local roles?

[Dieter Maurer]

Robert Boyd wrote at 2005-10-25 12:59 -0400:
 ...
I'm seeing that if I assign a role on an object to a user, then delete the
user, the object still lists the user as having the local role - and I can
assign the non-existant user more local roles, too. Thus, no referential
integrity between users and local roles. I suppose any of my code dealing
with local roles can try to get the user first before displaying their id,
to prevent showing these non-existant role-holders. Anyone deal with this
issue before?

A well known problem.

You have to implement your own cleanup code:

  When you delete a user, visit all objects with local roles
  for this user and remove them.

  This can get more efficient when you define an appropriate index
  (otherwise, locating the objects may take a very long time).

-- 
Dieter
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[Zope] Deleted users still have local roles?

[Robert Boyd]

Hello,

I'm seeing that if I assign a role on an object to a user, then delete
the user, the object still lists the user as having the local role -
and I can assign the non-existant user more local roles, too. Thus, no
referential integrity between users and local roles. I suppose any of
my code dealing with local roles can try to get the user first before
displaying their id, to prevent showing these non-existant
role-holders. Anyone deal with this issue before?

I guess this stems from the fact that in Zope, objects know which users
have local roles on them, but user objects don't know about the things
they have local roles on (correct me if I'm wrong). Is this also the
case in Zope 3? Often it's useful to be able to say User A can do
these things in relation to these objects but in Zope it appears you
have to inspect every object everywhere on the site in order to get
this information.

Rob
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