We've had a customized score calculator for one of our fields that we developed when we were using Lucene instead of Solr (lucene 2.4). During our switch to Solr, we simply continued to use that code. However, as the version of Lucene used in Solr changed to 2.9, somewhere along the way (unfortunately during our last release of code), that customization broke. I'd previously tried to keep it up to date by dealing with deprecation warnings, but managed to break things. Now I'm pretty lost with regards to that code.
Our customization is conceptually pretty simple, so rather than try to fix up our code, I'd like some advice on the best way to implement this with Solr 2.4 starting fresh. We have a multi-valued field, where each value is basically the id of a category. Along with the id, there's a score for how well the document fit into that category (between 0.0 and 1.0). I'm looking for that category-score to affect the score of documents when searching on that field. Any suggestions on the best way to attack this in Solr 2.4? Here's how we did it in Lucene: we had an extension of Query, with a custom scorer. In the index we stored the category id's as single-valued space-separated string. We also stored a space-separated string of scores in another field. We made of these fields stored. We simply delegated the search to the normal searcher, then we calculated the score we retrieved the values of both fields for the document. Then we turned the space-separated strings into arrays, searched the id array for the index of the desired id, then scanned the score array for the matching score, and returned. -- Stephen Duncan Jr www.stephenduncanjr.com
