I'm trying to implement something like this in Solr 6.6
http://www.solrtutorial.com/custom-solr-functionquery.html Custom Solr FunctionQueries - Solr Tutorial.com<http://www.solrtutorial.com/custom-solr-functionquery.html> www.solrtutorial.com Custom Solr FunctionQueries. Solr FunctionQueries allow you to modify the ranking of a search query in Solr by applying functions to the results. The goal is to take a field called 'foo' from all the documents and modify that field with a custom function. Has anyone been able to do this successfully? I can't find any helpful documentation. All the stuff I've found is broken and doesn't work. Thank you, Ali