Same name in other branches

1. 7.x modules/file/file.module \file_get_file_references()
2. 8.9.x core/modules/file/file.module \file_get_file_references()
3. 10 core/modules/file/file.module \file_get_file_references()
4. 11.x core/modules/file/file.module \file_get_file_references()

Retrieves a list of references to a file.

Parameters

\Drupal\file\FileInterface $file: A file entity.

\Drupal\Core\Field\FieldDefinitionInterface|null $field: (optional) A field definition to be used for this check. If given, limits the reference check to the given field. Defaults to NULL.

int $age: (optional) A constant that specifies which references to count. Use EntityStorageInterface::FIELD_LOAD_REVISION (the default) to retrieve all references within all revisions or EntityStorageInterface::FIELD_LOAD_CURRENT to retrieve references only in the current revisions of all entities that have references to this file.

string $field_type: (optional) The name of a field type. If given, limits the reference check to fields of the given type. If both $field and $field_type are given but $field is not the same type as $field_type, an empty array will be returned. Defaults to 'file'.

Return value

array A multidimensional array. The keys are field_name, entity_type, entity_id and the value is an entity referencing this file.

Related topics

2 calls to file_get_file_references()

FileAccessControlHandler::getFileReferences in core/modules/file/src/FileAccessControlHandler.php

Wrapper for file_get_file_references().

file_file_download in core/modules/file/file.module

Implements hook_file_download().

File

core/modules/file/file.module, line 1722

Code

function file_get_file_references(FileInterface $file, FieldDefinitionInterface $field = NULL, $age = EntityStorageInterface::FIELD_LOAD_REVISION, $field_type = 'file') {
    $references =& drupal_static(__FUNCTION__, []);
    $field_columns =& drupal_static(__FUNCTION__ . ':field_columns', []);
    // Fill the static cache, disregard $field and $field_type for now.
    if (!isset($references[$file->id()][$age])) {
        $references[$file->id()][$age] = [];
        $usage_list = \Drupal::service('file.usage')->listUsage($file);
        $file_usage_list = $usage_list['file'] ?? [];
        foreach ($file_usage_list as $entity_type_id => $entity_ids) {
            $entities = \Drupal::entityTypeManager()->getStorage($entity_type_id)
                ->loadMultiple(array_keys($entity_ids));
            foreach ($entities as $entity) {
                $bundle = $entity->bundle();
                // We need to find file fields for this entity type and bundle.
                if (!isset($file_fields[$entity_type_id][$bundle])) {
                    $file_fields[$entity_type_id][$bundle] = [];
                    // This contains the possible field names.
                    foreach ($entity->getFieldDefinitions() as $field_name => $field_definition) {
                        // If this is the first time this field type is seen, check
                        // whether it references files.
                        if (!isset($field_columns[$field_definition->getType()])) {
                            $field_columns[$field_definition->getType()] = file_field_find_file_reference_column($field_definition);
                        }
                        // If the field type does reference files then record it.
                        if ($field_columns[$field_definition->getType()]) {
                            $file_fields[$entity_type_id][$bundle][$field_name] = $field_columns[$field_definition->getType()];
                        }
                    }
                }
                foreach ($file_fields[$entity_type_id][$bundle] as $field_name => $field_column) {
                    // Iterate over the field items to find the referenced file and field
                    // name. This will fail if the usage checked is in a non-current
                    // revision because field items are from the current
                    // revision.
                    // We also iterate over all translations because a file can be linked
                    // to a language other than the default.
                    foreach ($entity->getTranslationLanguages() as $langcode => $language) {
                        foreach ($entity->getTranslation($langcode)
                            ->get($field_name) as $item) {
                            if ($file->id() == $item->{$field_column}) {
                                $references[$file->id()][$age][$field_name][$entity_type_id][$entity->id()] = $entity;
                                break;
                            }
                        }
                    }
                }
            }
        }
    }
    $return = $references[$file->id()][$age];
    // Filter the static cache down to the requested entries. The usual static
    // cache is very small so this will be very fast.
    $entity_field_manager = \Drupal::service('entity_field.manager');
    if ($field || $field_type) {
        foreach ($return as $field_name => $data) {
            foreach (array_keys($data) as $entity_type_id) {
                $field_storage_definitions = $entity_field_manager->getFieldStorageDefinitions($entity_type_id);
                $current_field = $field_storage_definitions[$field_name];
                if ($field_type && $current_field->getType() != $field_type || $field && $field->uuid() != $current_field->uuid()) {
                    unset($return[$field_name][$entity_type_id]);
                }
            }
        }
    }
    return $return;
}

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