function 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

Code

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