Untitled

<?php

/**
 * @file
 */

/**
 *
 * @param type $mappings
 * @param type $entity_type
 */
function apachesolr_text_apachesolr_field_mappings_alter(&$mappings, $entity_type) {
  // Enable indexing for text fields
  $mappings['text'] = array(
    'indexing_callback' => 'apachesolr_fields_default_indexing_callback',
    'map callback' => '',
    'index_type' => 'string',
    'facets' => TRUE,
    'facet missing allowed' => TRUE,
    'dependency plugins' => array('bundle', 'role'),
    'hierarchy callback' => FALSE,
    'name_callback' => '',
    'facet mincount allowed' => FALSE,
    // Field API allows any field to be multi-valued.
    // If we set this to false we are able to sort
    //'multiple' => FALSE,
  );
}

/**
 * Prepare the query by adding parameters, sorts, etc.
 *
 * This hook is invoked before the query is cached. The cached query is used
 * after the search such as for building facet and sort blocks, so parameters
 * added during this hook may be visible to end users.
 *
 * This is otherwise the same as HOOK_apachesolr_query_alter(), but runs before
 * it.
 *
 * @param object $query
 *  An object implementing DrupalSolrQueryInterface. No need for &.
 */
function apachesolr_text_apachesolr_query_prepare($query) {
  // Add a sort on the node ID.
  $query->setAvailableSort('its_field_year', array(
    'title' => t('Year'),
    'default' => 'asc',
  ));
}