function TaxonomyIndexTidDepth::query

Overrides InOperator::query

File

core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTidDepth.php, line 46

Class

TaxonomyIndexTidDepth

Filter handler for taxonomy terms with depth.

Namespace

Code

public function query() {
  // If no filter values are present, then do nothing.
  if (count($this->value) == 0) {
    return;
  }
  elseif (count($this->value) == 1) {
    // Sometimes $this->value is an array with a single element so convert it.
    if (is_array($this->value)) {
      $this->value = current($this->value);
    }
    $operator = '=';
  }
  else {
    $operator = 'IN';
  }
  // The normal use of ensureMyTable() here breaks Views.
  // So instead we trick the filter into using the alias of the base table.
  //   See https://www.drupal.org/node/271833.
  // If a relationship is set, we must use the alias it provides.
  if (!empty($this->relationship)) {
    $this->tableAlias = $this->relationship;
  }
  else {
    $this->tableAlias = $this->query
      ->ensureTable($this->view->storage
      ->get('base_table'));
  }
  // Now build the subqueries.
  $subquery = Database::getConnection()->select('taxonomy_index', 'tn');
  $subquery->addField('tn', 'nid');
  $where = (new Condition('OR'))->condition('tn.tid', $this->value, $operator);
  $last = "tn";
  if ($this->options['depth'] > 0) {
    $subquery->leftJoin('taxonomy_term__parent', 'th', "th.entity_id = tn.tid");
    $last = "th";
    foreach (range(1, abs($this->options['depth'])) as $count) {
      $subquery->leftJoin('taxonomy_term__parent', "th{$count}", "{$last}.parent_target_id = th{$count}.entity_id");
      $where->condition("th{$count}.entity_id", $this->value, $operator);
      $last = "th{$count}";
    }
  }
  elseif ($this->options['depth'] < 0) {
    foreach (range(1, abs($this->options['depth'])) as $count) {
      $field = $count == 1 ? 'tid' : 'entity_id';
      $subquery->leftJoin('taxonomy_term__parent', "th{$count}", "{$last}.{$field} = th{$count}.parent_target_id");
      $where->condition("th{$count}.entity_id", $this->value, $operator);
      $last = "th{$count}";
    }
  }
  $subquery->condition($where);
  $this->query
    ->addWhere($this->options['group'], "{$this->tableAlias}.{$this->realField}", $subquery, 'IN');
}