Boosting boolean fields in Solr

Question

Is it possible to boost boolean fields in Solr so that they receive a higher score?

We\'ve got an index which looks a bit like this:

• document_id
• t

Answer 1

Drupal

Here is the solution for those who're using Drupal CMS.

First, find your field name in Schema Browser at /solr/admin/schema.jsp

Then, depending on the module which you use, try the following examples:

Apachesolr module

Code example:

/**
 * Implements hook_apachesolr_query_alter().
 */
function hook_apachesolr_query_alter(DrupalSolrQueryInterface $query) {
  $query->addParam('bq', array('is_review' =>
    '(is_review:true^100 OR is_review:false^0)'
  ));
}

Search Solr API module

Code example:

/**
 * Implements hook_search_api_solr_query_alter().
 */
function hook_search_api_solr_query_alter(&$call_args, SearchApiQueryInterface $query) {
  $call_args['params']['bq'][] = '(is_review:true^100 OR is_review:false^0)';
}