: bq works only with q.alt query and not with q queries. So, in your case you : would be using qf parameter for field boosting, you will have to give both : the fields in qf parameter i.e. both title and media.
FWIW: that statement is false. the "boost query" (bq) is added to the query regardless of wether "q" or "q.alt" is ultimately used. if you turn on debugQUery=true and look at your resulting query string, you can see exactly what the resulting query is (parsedQuery) Using the example setup, compare the output from these examples... http://localhost:8983/solr/select/?q.alt=baz&q=solr&defType=dismax&qf=name+cat&bq=foo&debugQuery=true http://localhost:8983/solr/select/?q.alt=solr&q=&defType=dismax&qf=name+cat&bq=foo&debugQuery=true -Hoss