Limiting the output from MoreLikeThis in Solr

Question

I'm trying to use MoreLikeThis to get all similar documents but not documents with a specific contenttype.

So the first query needs to find the one document that I want to get "More Like This" of - and the second query needs to limit the similar documents to not be pdf's (-contenttype:pdf)

Does anyone know if this is possible?

Thanks

Answer 1

When using the MoreLikeThisHandler, all the common parameters applied to the mlt results set. So you can use the fq parameter to exclude your pdf documents from the mlt results:

http://localhost:8983/solr/mlt?q=test&mlt.fl=text&fq=-contenttype:pdf

The q parameter allows to select the document to generate mlt results (actually, it's the first document matching the initial query that is used).