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List:       perl-ldap-dev
Subject:    Re: LDAP data inheritance question
From:       Christopher A Bongaarts <cab () tc ! umn ! edu>
Date:       2004-09-01 17:15:38
Message-ID: 20040901171538.GA27230 () earth ! tc ! umn ! edu
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Also, some directory servers may have support for "collective
attributes" where the inheritance occurs at the server level (so if a
leaf object does not have an attribute populated, the server will
return the nearest parent's value for it).  In that case, you'd just
do a normal search.

In the immortal words of Graham Barr:
> On 1 Sep 2004, at 05:18, Jason Parsons wrote:
> >I have and LDAP tree set up like so (including only the relevant  
> >parts):
> >
> >dn: ou=example,ou=accounts,dc=example,dc=com [ref 3]
> >someBooleanAttribute: FALSE
> >
> >dn: ou=example.com,ou=example,ou=accounts,dc=example,dc=com [ref 2]
> >someBooleanAttribute: TRUE
> >
> >dn:  
> >cn=jparsons@example.com,ou=example.com,ou=example,ou=accounts,dc=exampl 
> >e,dc=com [ref 1]
> >mail: jparsons@example.com
> >someBooleanAttribute: FALSE
> >
> >I have an email address ('jparsons@example.com').  I need to know the  
> >value of someBooleanAttribute for the "most specific" match.  That is,  
> >in pseudocode:
> 
> >Does Net::LDAP make available some way to handle this "inheritance" in  
> >a single query?  Or do I have to send off all three queries and stitch  
> >together the results?
> 
> LDAP does not have support for this kind of search. You will need todo  
> a search to obtain [ref 1] then if it does not have the required  
> attribute do a "one" search on the parent dn with a filter like  
> (someBooleanAttribute=*). If that returns no results, search for the  
> next parent and so-on.
> 
> Graham.
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