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I am using Search API solr on my site. To get better search results I would like to boost the relevance by the value of a certain numeric field. Say, all items have a field A, which is numeric. Now I want to boost the relevance of those itemes by the value of field a, so that, if As value is higher the relevance of the item becomes higher too. I have absolutely no idea how to do this. Maybe with

hook_search_api_solr_query_alter() 

But I did not find documentation how to use it. Please hint me in the right direction.

2

hook_apachesolr_query_alter($query) alter the query after it's prepared and cached.

As per example given in documentation which I found, you can use this hook in similar way to other query_alter hook. E.g -

function hook_apachesolr_query_alter($query) {
  //Adding one more filter.
  $query->addFilter("is_uid", 1);

  // Only search titles.
  $query->replaceParam('qf', 'label');
}

Find the documentation by clicking on the mentioned hook name by me.

EDITED--

Sorry for giving example of other hook of apache solr module. You can find documentation of your hook here hook_search_api_solr_query_alter().

You can find a small snippet for example of this hook like --

function hook_search_api_solr_query_alter(array &$call_args, SearchApiQueryInterface $query) {
  if ($query->getOption('foobar')) {
    $call_args['params']['foo'] = 'bar';
  }
}

Eric has wrote a nice article with example of this hook.

  • 1
    Her question refers to Search API solr module and not to Apachesolr module. – user5950 Jul 15 '13 at 16:47
  • @user5950 - I have edited the answer...thanks for pointing out. – RajeevK Jul 22 '13 at 6:46
  • Use this to boost by a numeric field, where is_field_priority is the solr name for an indexed Drupal field. $call_args['params']['bf'][] = 'sum(1,product(2000,is_field_priority))' – user5950 Dec 22 '15 at 2:48

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