I actually could also use a custom similarity class that always returns 1.0 then I could use small boost factors such as ^1, ^2, ^3, etc.
But I want to do this only in some specific queries (that may contain other fields besides studentId) How could I do this, use the custom similarity class only for some queries? Is it possible? Thanks! 2016-10-03 19:49 GMT-03:00 Lucas Cotta <lucco...@gmail.com>: > Hello, > > I'm new in Solr (4.7.2) and I was given the following requirement: > > Given a query such as: > > studentId:(875141 OR 873071 OR 875198 OR 108142 OR 918841 OR 870688 OR > 107920 OR 870637 OR 870636 OR 870635 OR 918792 OR 107721 OR 875078 OR > 875166 OR 875151 OR 918829 OR 918808) > > I want the results to be ordered by the same order the elements were > informed in the query. This would be similar to MySQL's ORDER BY > FIELD(id, 3,2,5,7,8,1). > > I have tried to use term boosting > <https://wiki.apache.org/solr/SolrRelevancyCookbook#Boosting_Ranking_Terms> > in the query but that only works when I use big factors like this: > 875078^100000 > OR 875166^10000 OR 875151^1000 OR 918829^100OR 918808^10 > > But that would cause the query to be too big in case I have 200 ids for > instance. > > So it seems I need to implement a custom FunctionQuery. > I'm a little lost on how to do that. Could someone please give me an idea? > Which classes should my custom class extend from? Where should I place this > class? Should I add to Solr project it self and regenerate the JAR? > > Thanks >
