function apachesolr_term_reference_indexing_callback in Apache Solr Search 8
Same name and namespace in other branches
- 7 apachesolr.index.inc \apachesolr_term_reference_indexing_callback()
Callback that converts term_reference field into an array
Parameters
object $node:
string $field_name:
string $index_key:
array $field_info:
Return value
array $fields fields that will be indexed for this term reference
1 string reference to 'apachesolr_term_reference_indexing_callback'
- field_apachesolr_field_mappings in ./
apachesolr.module - Implements hook_apachesolr_field_mappings().
File
- ./
apachesolr.index.inc, line 1001 - Functions related to Apache Solr indexing operations.
Code
function apachesolr_term_reference_indexing_callback($node, $field_name, $index_key, array $field_info) {
// Keep ancestors cached
$ancestors =& drupal_static(__FUNCTION__, array());
$fields = array();
$vocab_names = array();
if (!empty($node->{$field_name}) && function_exists('taxonomy_get_parents_all')) {
$field = $node->{$field_name};
list($lang, $items) = each($field);
foreach ($items as $item) {
// Triple indexing of tids lets us do efficient searches (on tid)
// and do accurate per field or per-vocabulary faceting.
// By including the ancestors to a term in the index we make
// sure that searches for general categories match specific
// categories, e.g. Fruit -> apple, a search for fruit will find
// content categorized with apple.
if (!isset($ancestors[$item['tid']])) {
$ancestors[$item['tid']] = taxonomy_get_parents_all($item['tid']);
}
foreach ($ancestors[$item['tid']] as $ancestor) {
// Index parent term against the field. Note that this happens
// regardless of whether the facet is set to show as a hierarchy or not.
// We would need a separate field if we were to index terms without any
// hierarchy at all.
// If the term is singular, then we cannot add another value to the
// document as the field is single
if ($field_info['multiple']) {
$fields[] = array(
'key' => $index_key,
'value' => $ancestor->tid,
);
}
$fields[] = array(
'key' => 'tid',
'value' => $ancestor->tid,
);
$fields[] = array(
'key' => 'im_vid_' . $ancestor->vid,
'value' => $ancestor->tid,
);
$name = apachesolr_clean_text($ancestor->name);
$vocab_names[$ancestor->vid][] = $name;
// We index each name as a string for cross-site faceting
// using the vocab name rather than vid in field construction .
$fields[] = array(
'key' => 'sm_vid_' . apachesolr_vocab_name($ancestor->vid),
'value' => $name,
);
}
}
// Index the term names into a text field for MLT queries and keyword searching.
foreach ($vocab_names as $vid => $names) {
$fields[] = array(
'key' => 'tm_vid_' . $vid . '_names',
'value' => implode(' ', $names),
);
}
}
return $fields;
}