function file_usage_delete

Removes a record to indicate that a module is no longer using a file.

The file_delete() function is typically called after removing a file usage to remove the record from the file_managed table and delete the file itself.

Parameters

$file: A file object.

$module: The name of the module using the file.

$type: (optional) The type of the object that contains the referenced file. May be omitted if all module references to a file are being deleted.

$id: (optional) The unique, numeric ID of the object containing the referenced file. May be omitted if all module references to a file are being deleted.

$count: (optional) The number of references to delete from the object. Defaults to 1. 0 may be specified to delete all references to the file within a specific object.

See also

file_usage_add()

file_usage_list()

file_delete()

Related topics

File interface
Common file handling functions.
8 calls to file_usage_delete()
FileDeleteTest::testInUse in drupal/modules/simpletest/tests/file.test
Tries deleting a file that is in use.
FileUsageTest::testRemoveUsage in drupal/modules/simpletest/tests/file.test
Tests file_usage_delete().
file_field_delete_file in drupal/modules/file/file.field.inc
Decrements the usage count for a file and attempts to delete it.
image_field_delete_field in drupal/modules/image/image.module
Implements hook_field_delete_field().
image_field_delete_instance in drupal/modules/image/image.module
Implements hook_field_delete_instance().

... See full list

File

drupal/includes/file.inc, line 737
API for handling file uploads and server file management.

Code

function file_usage_delete(stdClass $file, $module, $type = NULL, $id = NULL, $count = 1) {

  // Delete rows that have a exact or less value to prevent empty rows.
  $query = db_delete('file_usage')
    ->condition('module', $module)
    ->condition('fid', $file->fid);
  if ($type && $id) {
    $query
      ->condition('type', $type)
      ->condition('id', $id);
  }
  if ($count) {
    $query
      ->condition('count', $count, '<=');
  }
  $result = $query
    ->execute();

  // If the row has more than the specified count decrement it by that number.
  if (!$result && $count > 0) {
    $query = db_update('file_usage')
      ->condition('module', $module)
      ->condition('fid', $file->fid);
    if ($type && $id) {
      $query
        ->condition('type', $type)
        ->condition('id', $id);
    }
    $query
      ->expression('count', 'count - :count', array(
      ':count' => $count,
    ));
    $query
      ->execute();
  }
}