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<?php
/**
* @file
* Definition of views_handler_relationship_node_term_data.
*/
/**
* Relationship handler to return the taxonomy terms of nodes.
*
* @ingroup views_relationship_handlers
*/
class views_handler_relationship_node_term_data extends views_handler_relationship {
function init(&$view, &$options) {
parent::init($view, $options);
// Convert legacy vids option to machine name vocabularies.
if (!empty($this->options['vids'])) {
$vocabularies = taxonomy_get_vocabularies();
foreach ($this->options['vids'] as $vid) {
if (isset($vocabularies[$vid], $vocabularies[$vid]->machine_name)) {
$this->options['vocabularies'][$vocabularies[$vid]->machine_name] = $vocabularies[$vid]->machine_name;
}
}
}
}
function option_definition() {
$options = parent::option_definition();
$options['vocabularies'] = array('default' => array());
return $options;
}
function options_form(&$form, &$form_state) {
$vocabularies = taxonomy_get_vocabularies();
$options = array();
foreach ($vocabularies as $voc) {
$options[$voc->machine_name] = check_plain($voc->name);
}
$form['vocabularies'] = array(
'#type' => 'checkboxes',
'#title' => t('Vocabularies'),
'#options' => $options,
'#default_value' => $this->options['vocabularies'],
'#description' => t('Choose which vocabularies you wish to relate. Remember that every term found will create a new record, so this relationship is best used on just one vocabulary that has only one term per node.'),
);
parent::options_form($form, $form_state);
}
/**
* Called to implement a relationship in a query.
*/
function query() {
$this->ensure_my_table();
$def = $this->definition;
$def['table'] = 'taxonomy_term_data';
if (!array_filter($this->options['vocabularies'])) {
$taxonomy_index = $this->query->add_table('taxonomy_index', $this->relationship);
$def['left_table'] = $taxonomy_index;
$def['left_field'] = 'tid';
$def['field'] = 'tid';
$def['type'] = empty($this->options['required']) ? 'LEFT' : 'INNER';
}
else {
// If vocabularies are supplied join a subselect instead
$def['left_table'] = $this->table_alias;
$def['left_field'] = 'nid';
$def['field'] = 'nid';
$def['type'] = empty($this->options['required']) ? 'LEFT' : 'INNER';
$query = db_select('taxonomy_term_data', 'td');
$query->addJoin($def['type'], 'taxonomy_vocabulary', 'tv', 'td.vid = tv.vid');
$query->addJoin($def['type'], 'taxonomy_index', 'tn', 'tn.tid = td.tid');
$query->condition('tv.machine_name', array_filter($this->options['vocabularies']));
if (empty($this->query->options['disable_sql_rewrite'])) {
$query->addTag('term_access');
}
$query->fields('td');
$query->fields('tn', array('nid'));
$def['table formula'] = $query;
}
$join = new views_join();
$join->definition = $def;
$join->construct();
$join->adjusted = TRUE;
// use a short alias for this:
$alias = $def['table'] . '_' . $this->table;
$this->alias = $this->query->add_relationship($alias, $join, 'taxonomy_term_data', $this->relationship);
}
}
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