Modify apache solr search sort options?

Question

Is there the ability through contrib module or hooks to modify how the apache solr sort block sorts queries?

Currently, it seems it supports these queries out of the box:

• Relevancy
• Title
• Author
• Date

What i would like to have is to remove Author, Add a field to sort title from a-z and z-a. Is that possible?

Answer 1

You can find all info with examples here: http://drupal.org/node/715276

<?php
function MYMODULE_apachesolr_query_prepare(DrupalSolrQueryInterface &$query, &$caller) {
  $query->addParam('fl', 'some_field_image');
  $query->addParam('fl', 'some_field_date');
  //Remove sorts
  $query->remove_available_sort('sort_label');
  $query->remove_available_sort('bundle');
  $query->remove_available_sort('sort_name');
  //Rename sorts
  $query->remove_available_sort('score');
  $query->set_available_sort('score', array('title' => t('Relevance'), 'default' => 'desc'));
  $query->remove_available_sort('ds_created');
  $query->set_available_sort('ds_created', array('title' => t('Latest'), 'default' => 'desc'));
 }
?>

Answer 2

There is a module Apachesolr Sort that provides an UI to configure apachesolr sort block. From module page:

• Removal of a sort by field
• Weights for the sort by fields
• Neat integration with the apachesolr modules.
• Adds a block that gives you a select block to sort your results on.