title: Boost document in Solr
body: <p>i'd like to boost documents in solr only if a certain field has a fixed value
  for example:</p>
  
  <p>i'd like to boost all documents that have the value of the field colour set to "yellow"</p>
  
  <p><code>bf=colour:yellow^10</code></p>
  
  <p>Is it possible?</p>