BookOutlineStorage::getBooks

public BookOutlineStorage::getBooks()

Gets books (the highest positioned book links).

Return value

array An array of book IDs.

Overrides BookOutlineStorageInterface::getBooks

File

core/modules/book/src/BookOutlineStorage.php, line 29

Class

BookOutlineStorage

Defines a storage class for books outline.

Namespace

Drupal\book

Code

public function getBooks() {
  return $this->connection->query("SELECT DISTINCT(bid) FROM {book}")->fetchCol();
}