public function HierarchyIsChildOfEntity::query in Entity Reference Hierarchy 8.2

Same name and namespace in other branches

1. 3.x src/Plugin/views/argument/HierarchyIsChildOfEntity.php \Drupal\entity_hierarchy\Plugin\views\argument\HierarchyIsChildOfEntity::query()

Set up the query for this argument.

The argument sent may be found at $this->argument.

Overrides ArgumentPluginBase::query

File

src/Plugin/views/argument/HierarchyIsChildOfEntity.php, line 19

Class

HierarchyIsChildOfEntity

Argument to limit to children of an entity.

Namespace

Drupal\entity_hierarchy\Plugin\views\argument

Code

public function query($group_by = FALSE) {
  $this
    ->ensureMyTable();

  // Load the actual entity.
  $filtered = FALSE;
  if ($entity = $this
    ->loadEntity()) {
    $stub = $this->nodeKeyFactory
      ->fromEntity($entity);
    if ($node = $this
      ->getTreeStorage()
      ->getNode($stub)) {

      // Query between a range.
      $filtered = TRUE;
      $lower_token = ':lower_' . $this->tableAlias;
      $upper_token = ':upper_' . $this->tableAlias;
      $expression = "{$this->tableAlias}.{$this->realField} BETWEEN {$lower_token} and {$upper_token} AND {$this->tableAlias}.{$this->realField} <> {$lower_token}";
      $arguments = [
        $lower_token => $node
          ->getLeft(),
        $upper_token => $node
          ->getRight(),
      ];
      if ($depth = $this->options['depth']) {
        $depth_token = ':depth_' . $this->tableAlias;
        $expression .= " AND {$this->tableAlias}.depth <= {$depth_token}";
        $arguments[$depth_token] = $node
          ->getDepth() + $depth;
      }
      $this->query
        ->addWhereExpression(0, $expression, $arguments);
    }
  }

  // The parent entity doesn't exist, or isn't in the tree and hence has no
  // children.
  if (!$filtered) {

    // Add a killswitch.
    $this->query
      ->addWhereExpression(0, '1 <> 1');
  }
}