Hi Jack,
thank you for the hint.
Since I have already a solrj client to do the preprocessing, mapping to
sort fields isn't my problem. I will try to explain better in my reply
to Erick.
Uwe
(Sorry late reaction)
Am 30.08.2012 16:04, schrieb Jack Krupansky:
You can also use a "Field Mutating Update Processor" to do a "smart"
copy of a multi-valued field to a sortable single-valued field.
See:
http://wiki.apache.org/solr/UpdateRequestProcessor#Field_Mutating_Update_Processors
Such as using the maximum value via MaxFieldValueUpdateProcessorFactory.
See:
http://lucene.apache.org/solr/api-4_0_0-BETA/org/apache/solr/update/processor/MaxFieldValueUpdateProcessorFactory.html
Which value of a multi-valued field do you wish to sort by?
-- Jack Krupansky
