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Reviewed:  https://reviews.mahara.org/269
Committed: http://gitorious.org/mahara/mahara/commit/18c7415febcc36c2ee1e172568e7c106e73b9484
Submitter: Francois Marier (francois@xxxxxxxxxxxxxxx)
Branch:    1.4_STABLE

commit 18c7415febcc36c2ee1e172568e7c106e73b9484
Author: I��aki Arenaza <iarenaza@xxxxxxxxxxxxx>
Date:   Tue May 31 23:00:24 2011 +0200

    Update user info on login can prevent re-login if a LDAP attribute is empty.
    
    If the LDAP attribute is empty, some LDAP servers don't return the attribute in
    the answer (as an empty value). This means the missing attribute is not present
    in the $ldapdetails array returned by get_userinfo_ldap(). If we try to compare
    the missing entry with the existing user value, they are always different
    (unless the existing entry was also empty). Which means we assign an empty value
    to the user profile field (which is not allowed by the db).
    
    Simply testing if the LDAP attribute has been retrieved and is not empty before
    making the comparison fixes the problem.
    
    Tested with both MS AD (on W2003) and OpenLDAP 2.4.23 (on Debian).
    
    Fixes bug #656679 (which also fixes bug #788029)
    
    Change-Id: I0a44bae18dea10e79f96479045a9dadf7b8120b8
    Signed-off-by: I��aki Arenaza <iarenaza@xxxxxxxxxxxxx>

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https://bugs.launchpad.net/bugs/656679

Title:
  Update user info on login can prevent re-login

Status in Mahara ePortfolio:
  Confirmed

Bug description:
  Using Active Directory LDAP for authentication. It seemed that having
  the 'Update user info on login' tickbox enabled caused Mahara to
  appear to go-offline to that user upon re-logins. I tried this with
  several users and it was repeatable. There was a similar sounding bug
  reported a while back I think - it may be the same.