function file_invalidate_field_caches

Clear the field cache for any entities referencing a specific file.

Parameters

object $file: A file object.

File

core/modules/file/file.module, line 2485

Defines a "managed_file" Form API field and a "file" field for Field module.

Code

function file_invalidate_field_caches($file) {
  $entity_types = &backdrop_static(__FUNCTION__);

  // Gather the list of entity types which support field caching.
  if (!isset($entity_types)) {
    $entity_types = array();
    foreach (entity_get_info() as $entity_type => $entity_info) {
      if (!empty($entity_info['fieldable']) && !empty($entity_info['field cache'])) {
        $entity_types[] = $entity_type;
      }
    }
  }

  // If no entity types support field caching, then there is no work to be done.
  if (empty($entity_types)) {
    return;
  }

  $records = db_query("SELECT DISTINCT type, id FROM {file_usage} WHERE fid = :fid AND type IN (:types) AND id > 0", array(':fid' => $file->fid, ':types' => $entity_types))->fetchAll();
  if (!empty($records)) {
    $cids = array();
    foreach ($records as $record) {
      $cids[] = 'field:' . $record->type . ':' . $record->id;
    }
    cache_clear_all($cids, 'cache_field');
  }
}