Same name in other branches

1. 9 core/modules/jsonapi/src/JsonApiResource/ResourceIdentifier.php \Drupal\jsonapi\JsonApiResource\ResourceIdentifier::getVirtualOrMissingResourceIdentifier()
2. 10 core/modules/jsonapi/src/JsonApiResource/ResourceIdentifier.php \Drupal\jsonapi\JsonApiResource\ResourceIdentifier::getVirtualOrMissingResourceIdentifier()
3. 11.x core/modules/jsonapi/src/JsonApiResource/ResourceIdentifier.php \Drupal\jsonapi\JsonApiResource\ResourceIdentifier::getVirtualOrMissingResourceIdentifier()

Creates a ResourceIdentifier for a NULL or FALSE entity reference item.

Parameters

\Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem $item: The entity reference field item.

Return value

self A new ResourceIdentifier object.

1 call to ResourceIdentifier::getVirtualOrMissingResourceIdentifier()

ResourceIdentifier::toResourceIdentifier in core/modules/jsonapi/src/JsonApiResource/ResourceIdentifier.php

Creates a ResourceIdentifier object.

File

core/modules/jsonapi/src/JsonApiResource/ResourceIdentifier.php, line 411

Class

ResourceIdentifier

Represents a JSON:API resource identifier object.

Namespace

Drupal\jsonapi\JsonApiResource

Code

protected static function getVirtualOrMissingResourceIdentifier(EntityReferenceItem $item) {
    $resource_type_repository = \Drupal::service('jsonapi.resource_type.repository');
    $property_name = static::getDataReferencePropertyName($item);
    $value = $item->get($property_name)
        ->getValue();
    assert($value === NULL);
    $field = $item->getParent();
    assert($field instanceof EntityReferenceFieldItemListInterface);
    $host_entity = $field->getEntity();
    assert($host_entity instanceof EntityInterface);
    $resource_type = $resource_type_repository->get($host_entity->getEntityTypeId(), $host_entity->bundle());
    assert($resource_type instanceof ResourceType);
    $relatable_resource_types = $resource_type->getRelatableResourceTypesByField($resource_type->getPublicName($field->getName()));
    assert(!empty($relatable_resource_types));
    $get_metadata = function ($type) {
        return [
            'links' => [
                'help' => [
                    'href' => "https://www.drupal.org/docs/8/modules/json-api/core-concepts#{$type}",
                    'meta' => [
                        'about' => "Usage and meaning of the '{$type}' resource identifier.",
                    ],
                ],
            ],
        ];
    };
    $resource_type = reset($relatable_resource_types);
    // A non-empty entity reference field that refers to a non-existent entity
    // is not a data integrity problem. For example, Term entities' "parent"
    // entity reference field uses target_id zero to refer to the non-existent
    // "<root>" term. And references to entities that no longer exist are not
    // cleaned up by Drupal; hence we map it to a "missing" resource.
    if ($field->getFieldDefinition()
        ->getSetting('target_type') === 'taxonomy_term' && $item->get('target_id')
        ->getCastedValue() === 0) {
        if (count($relatable_resource_types) !== 1) {
            throw new \RuntimeException('Relationships to virtual resources are possible only if a single resource type is relatable.');
        }
        return new static($resource_type, 'virtual', $get_metadata('virtual'));
    }
    else {
        // In case of a dangling reference, it is impossible to determine which
        // resource type it used to reference, because that requires knowing the
        // referenced bundle, which Drupal does not store.
        // If we can reliably determine the resource type of the dangling
        // reference, use it; otherwise conjure a fake resource type out of thin
        // air, one that indicates we don't know the bundle.
        $resource_type = count($relatable_resource_types) > 1 ? new ResourceType('?', '?', '') : reset($relatable_resource_types);
        return new static($resource_type, 'missing', $get_metadata('missing'));
    }
}

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