function EntityViewBuilder::buildComponents

Overrides EntityViewBuilderInterface::buildComponents

File

core/lib/Drupal/Core/Entity/EntityViewBuilder.php, line 315

Class

EntityViewBuilder

Base class for entity view builders.

Namespace

Code

public function buildComponents(array &$build, array $entities, array $displays, $view_mode) {
    $entities_by_bundle = [];
    foreach ($entities as $id => $entity) {
        // Initialize the field item attributes for the fields being displayed.
        // The entity can include fields that are not displayed, and the display
        // can include components that are not fields, so we want to act on the
        // intersection. However, the entity can have many more fields than are
        // displayed, so we avoid the cost of calling $entity->getProperties()
        // by iterating the intersection as follows.
        foreach ($displays[$entity->bundle()]
            ->getComponents() as $name => $options) {
            if ($entity->hasField($name)) {
                foreach ($entity->get($name) as $item) {
                    $item->_attributes = [];
                }
            }
        }
        // Group the entities by bundle.
        $entities_by_bundle[$entity->bundle()][$id] = $entity;
    }
    // Invoke hook_entity_prepare_view().
    $this->moduleHandler()
        ->invokeAll('entity_prepare_view', [
        $this->entityTypeId,
        $entities,
        $displays,
        $view_mode,
    ]);
    // Let the displays build their render arrays.
    foreach ($entities_by_bundle as $bundle => $bundle_entities) {
        $display_build = $displays[$bundle]->buildMultiple($bundle_entities);
        foreach ($bundle_entities as $id => $entity) {
            $build[$id] += $display_build[$id];
        }
    }
}