Same name in other branches

1. 9 core/modules/jsonapi/src/JsonApiResource/ResourceIdentifier.php \Drupal\jsonapi\JsonApiResource\ResourceIdentifier::toResourceIdentifiers()
2. 8.9.x core/modules/jsonapi/src/JsonApiResource/ResourceIdentifier.php \Drupal\jsonapi\JsonApiResource\ResourceIdentifier::toResourceIdentifiers()
3. 11.x core/modules/jsonapi/src/JsonApiResource/ResourceIdentifier.php \Drupal\jsonapi\JsonApiResource\ResourceIdentifier::toResourceIdentifiers()

Creates an array of ResourceIdentifier objects.

Parameters

\Drupal\Core\Field\EntityReferenceFieldItemListInterface $items: The entity reference field items from which to create the relationship array.

Return value

self[] An array of new ResourceIdentifier objects with appropriate arity values.

3 calls to ResourceIdentifier::toResourceIdentifiers()

EntityReferenceFieldNormalizer::normalize in core/modules/jsonapi/src/Normalizer/EntityReferenceFieldNormalizer.php

Relationship::createFromEntityReferenceField in core/modules/jsonapi/src/JsonApiResource/Relationship.php

Creates a new Relationship from an entity reference field.

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

Creates an array of ResourceIdentifier objects with arity on every value.

File

core/modules/jsonapi/src/JsonApiResource/ResourceIdentifier.php, line 314

Class

ResourceIdentifier

Represents a JSON:API resource identifier object.

Namespace

Drupal\jsonapi\JsonApiResource

Code

public static function toResourceIdentifiers(EntityReferenceFieldItemListInterface $items) {
    $relationships = [];
    foreach ($items->filterEmptyItems() as $item) {
        // Create a ResourceIdentifier from the field item. This will make it
        // comparable with all previous field items. Here, it is assumed that the
        // resource identifier is unique so it has no arity. If a parallel
        // relationship is encountered, it will be assigned later.
        $relationship = static::toResourceIdentifier($item);
        if ($relationship->getResourceType()
            ->isInternal()) {
            continue;
        }
        // Now, iterate over the previously seen resource identifiers in reverse
        // order. Reverse order is important so that when a parallel relationship
        // is encountered, it will have the highest arity value so the current
        // relationship's arity value can simply be incremented by one.
        
        /** @var \Drupal\jsonapi\JsonApiResource\ResourceIdentifier $existing */
        foreach (array_reverse($relationships, TRUE) as $index => $existing) {
            $is_parallel = static::isParallel($existing, $relationship);
            if ($is_parallel) {
                // A parallel relationship has been found. If the previous
                // relationship does not have an arity, it must now be assigned an
                // arity of 0.
                if (!$existing->hasArity()) {
                    $relationships[$index] = $existing->withArity(0);
                }
                // Since the new ResourceIdentifier is parallel, it must have an arity
                // assigned to it that is the arity of the last parallel
                // relationship's arity + 1.
                $relationship = $relationship->withArity($relationships[$index]->getArity() + 1);
                break;
            }
        }
        // Finally, append the relationship to the list of ResourceIdentifiers.
        $relationships[] = $relationship;
    }
    return $relationships;
}

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