views_handler_filter_term_node_tid_depth.inc
- 3.x modules/taxonomy/views_handler_filter_term_node_tid_depth.inc
- 2.x modules/taxonomy/views_handler_filter_term_node_tid_depth.inc
File
modules/taxonomy/views_handler_filter_term_node_tid_depth.incView source
- <?php
- /**
- * Filter handler for taxonomy terms with depth.
- *
- * This handler is actually part of the node table and has some restrictions,
- * because it uses a subquery to find nodes with
- */
- class views_handler_filter_term_node_tid_depth extends views_handler_filter_term_node_tid {
- function operator_options() {
- return array(
- 'or' => t('Is one of'),
- );
- }
-
- function option_definition() {
- $options = parent::option_definition();
-
- $options['depth'] = array('default' => 0);
-
- return $options;
- }
-
- function extra_options_form(&$form, &$form_state) {
- parent::extra_options_form($form, $form_state);
-
- $form['depth'] = array(
- '#type' => 'weight',
- '#title' => t('Depth'),
- '#default_value' => $this->options['depth'],
- '#description' => t('The depth will match nodes tagged with terms in the hierarchy. For example, if you have the term "fruit" and a child term "apple", with a depth of 1 (or higher) then filtering for the term "fruit" will get nodes that are tagged with "apple" as well as "fruit". If negative, the reverse is true; searching for "apple" will also pick up nodes tagged with "fruit" if depth is -1 (or lower).'),
- );
- }
-
- function query() {
- // If no filter values are present, then do nothing.
- if (count($this->value) == 0) {
- return;
- }
- else if (count($this->value) == 1) {
- $placeholder = " = %d";
- }
- else {
- $placeholder = " IN (" . implode(', ', array_fill(0, sizeof($this->value), '%d')) . ")";
- }
-
- // The normal use of ensure_my_table() here breaks Views.
- // So instead we trick the filter into using the alias of the base table.
- // See http://drupal.org/node/271833
- // If a relationship is set, we must use the alias it provides.
- if (!empty($this->relationship)) {
- $this->table_alias = $this->relationship;
- }
- // If no relationship, then use the alias of the base table.
- else if (isset($this->query->table_queue[$this->query->base_table]['alias'])) {
- $this->table_alias = $this->query->table_queue[$this->query->base_table]['alias'];
- }
- // This should never happen, but if it does, we fail quietly.
- else {
- return;
- }
-
- // Now build the subqueries.
- $subquery = "\n SELECT tn.vid FROM {term_node} tn\n";
- $where = " WHERE tn.tid $placeholder\n";
- $args = $this->value;
- $last = "tn";
-
- if ($this->options['depth'] > 0) {
- $subquery .= " LEFT JOIN {term_hierarchy} th ON th.tid = tn.tid\n";
- $last = "th";
- foreach (range(1, abs($this->options['depth'])) as $count) {
- $subquery .= " LEFT JOIN {term_hierarchy} th$count ON $last.parent = th$count.tid\n";
- $where .= " OR th$count.tid $placeholder\n";
- $args = array_merge($args, $this->value);
- $last = "th$count";
- }
- }
- else if ($this->options['depth'] < 0) {
- foreach (range(1, abs($this->options['depth'])) as $count) {
- $subquery .= " LEFT JOIN {term_hierarchy} th$count ON $last.tid = th$count.parent\n";
- $where .= " OR th$count.tid $placeholder\n";
- $args = array_merge($args, $this->value);
- $last = "th$count";
- }
- }
-
- $this->query->add_where(0, "$this->table_alias.$this->real_field IN ($subquery$where )", $args);
- }
- }