Hi, Check out the new eDisMax handler (src) and the new pf2 parameter. Also available as path SOLR-1553. Another option to avoid match for doc2 is to add application specific logic in your frontend which detects car brands and years and rewrite the query into a phrase or a filter.
-- Jan Høydahl, search solution architect Cominvent AS - www.cominvent.com Training in Europe - www.solrtraining.com On 1. juli 2010, at 19.43, Nick Hall wrote: > In my application, I have documents like: > > DOCUMENT 1: > part_num: ABC123 Spark Plug > application: 2008 Toyota Corolla > application: 2007 Honda Civic > > DOCUMENT 2: > part_num: FGH234 Spark Plug > application: 2007 Toyota Corolla > application: 2008 Honda Civic > > The "application" field is set up to be a multi-valued field, and I am using > the DisMax request handler. > > My goal is to be able to have the user search for something like: > > 2008 Toyota Corolla Spark Plug > > and have it match Document 1 in this case. This currently works by using > DisMax and having it search both the part_num and application field. > However, this search also finds Document 2 because all the terms, "2008", > "Toyota", and "Corolla" all appear in the application fields, even though > they do not belong together in this case. > > I understand that it may be hard to eliminate Document 2 from the search > results because the search has to be allowed to be a little fuzzy, but if I > check the scores of the documents, Document 1 is just barely ahead of > Document 2 in its score. I would like to figure out a way to get Document 1 > to score higher in this case, since part of the query matches the phrase in > its application exactly. > > I've been playing around with the phrase fields (pf) and phrase slop (ps) > parameters to try to get it to realize that "2008 Toyota Corolla" is a > phrase, in this example, and weight it higher for Document 1, but I haven't > been able to get Solr to identify this as a phrase. I've been looking at the > debug query and it will identify it as a phrase if the user only types in > something like: > > 2008 Toyota Corolla > > but as soon as the Spark Plug terms are added, it looks like Solr is trying > to make the entire search expression into one long phrase. > > Does anyone have a recommendation of how this can be done, so it can break > the search expression down and automatically make a phrase out of part of > it? Or, should I approach this whole problem from a different angle? Thanks.
