Is it possible to tweak Solr hit relevance score based on length of content?

I have a Rails app using sunspot to do searches against a table with records of varying sizes. I want to adjust the score of the 开发者_C百科hit depending on how large a certain field is. This is to punish articles that have very little content but happens to have the term being searched for showing up at the top. Is that possible?

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One technique: compute the body length at insertion time and give the whole document a Boost based on its higher length - you'd supply this Boost manually, for each document at index-time.

See this FAQ: http://wiki.apache.org/solr/SolrRelevancyFAQ#How_can_I_increase_the_score_for_specific_documents

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This mailing list thread seems to kind of answer your question - and brings up another point that you might be thinking about this wrong.

http://osdir.com/ml/solr-user.lucene.apache.org/2010-05/msg00916.html

This quote is illustrative: "I have to ask, though, why you want to sort this way? The relevance calculations already factor in both term frequency and field length. What's the use-case for sorting by field length given the above?"