Hi, I am trying to solve a sorting problem using Solr. The sorting requirements are a bit complicated. I have to sort the documents by three different criteria:
- First by number of keywords that match (coordination factor) - Then, within the documents that match the same number of keywords, sort first the documents that match a user value (country) and then the rest. - Then within those two blocks, sort by a document value (popularity). I have managed to make the second and third criteria to work, with a query like this: http://localhost:8983/solr/select/?q=description%3Afootball&version=2.2&start=0&rows=10&indent=on&qq=country_uk:true&sort=map%28query%28$qq,-1%29,0,9999999,1%29%20desc,popularity%20desc This gets with the query function a positive value for the documents that match the country, and a negative for the ones that don't, and then maps those ones to 1, so I have two blocks of documents with sorting value of 1 and -1, which works for me cause ties are then sorted by popularity. But as you see, this is only searching for 1 keyword. My problem comes with the first requirement when we search for more than one keyword, because as I understand, I would like to sort by the coordination factor, which is the number of query keywords that each document matches. The problem is that there's no Function Query I can use to get that value, so I don't know how to proceed. I was trying to understand if there was a way to split the regular score into sets which should mean that the same number of keywords was matched, but the score depends on different things, and the range of values can be arbitrary, so I'm not able to make such a function. Is there any solution to this? Thanks, Jesus.
