Digg-like search result ranking with Lucene / Solr?

Question

I'm using Solr for search.

I have documents that have an integer field "popularity".

I want to rank results by a combination of normal fulltext search relevance and popularity.

It's kinda like search in digg - result ranking is based on the search relevance as well as how many digs a posting has.

I don't have any specific ranking algorithm in mind. But is this something that can be done with solr?

Answer 1

Solr's FunctionQuery is exactly what you need:

http://wiki.apache.org/solr/FunctionQuery