function views_handler_filter_term_node_tid_depth::query

Overrides views_handler_filter_in_operator::query

File

modules/taxonomy/views_handler_filter_term_node_tid_depth.inc, line 55

Class

views_handler_filter_term_node_tid_depth

Filter handler for taxonomy terms with depth.

Code

public function query() {
  // If no filter values are present, then do nothing.
  if (count($this->value) == 0) {
    return;
  }
  elseif (count($this->value) == 1) {
    // Somethis $this->value is an array with a single element so convert it.
    if (is_array($this->value)) {
      $this->value = current($this->value);
    }
    $operator = '=';
  }
  else {
    $operator = 'IN';
    // " IN ("
    // . implode(', ', array_fill(0, sizeof($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 = $this->relationship;
  }
  elseif (isset($this->query->table_queue[$this->query->base_table]['alias'])) {
    $this->table_alias = $this->query->table_queue[$this->query->base_table]['alias'];
  }
  else {
    return;
  }
  // Now build the subqueries.
  $subquery = db_select('taxonomy_index', 'tn');
  $subquery->addField('tn', 'nid');
  $where = db_or()->condition('tn.tid', $this->value, $operator);
  $last = "tn";
  if ($this->options['depth'] > 0) {
    $subquery->leftJoin('taxonomy_term_hierarchy', 'th', "th.tid = tn.tid");
    $last = "th";
    foreach (range(1, abs($this->options['depth'])) as $count) {
      $subquery->leftJoin('taxonomy_term_hierarchy', "th{$count}", "{$last}.parent = th{$count}.tid");
      $where->condition("th{$count}.tid", $this->value, $operator);
      $last = "th{$count}";
    }
  }
  elseif ($this->options['depth'] < 0) {
    foreach (range(1, abs($this->options['depth'])) as $count) {
      $subquery->leftJoin('taxonomy_term_hierarchy', "th{$count}", "{$last}.tid = th{$count}.parent");
      $where->condition("th{$count}.tid", $this->value, $operator);
      $last = "th{$count}";
    }
  }
  $subquery->condition($where);
  $this->query
    ->add_where($this->options['group'], "{$this->table_alias}.{$this->real_field}", $subquery, 'IN');
}