On 06/20/2012 09:35 PM, Andrew Findlay wrote:
> Jan Beerden wrote:
>> Is there a way to have a unique constraint over multiple attributes? We have
>> different attributes for the primary email address of a person, and for
>> additional aliases, and we'd like to enforce global uniqueness in such a way
>> that the primary email address for one person can not be used as an email
>> alias for another person.
>> The slapo-unique manpage doesn't make this very clear.
To achieve what Jan wants, I would consider requiring the primary
email address to also be listed as one of the aliases. A uniqueness
constraint like this would then protect against one entry hijacking
the address of another:
The requirement for the primaryMail value to also appear as an
aliasMail value could be enforced using the constraint overlay with
the 'set' mechanism, something like:
constraint_attribute primaryMail,aliasMail set
"this/primaryMail & this/aliasMail"
Thanks! This does
exactly what we wanted.
Jan Beerden jan.beerden(a)fks.be
fks bvba - Formal and Knowledge Systems http://www.fks.be/
Schampbergstraat 32 Tel: ++32-(0)11-21 49 11
B-3511 Kuringen Fax: ++32-(0)11-22 04 19