function BookOutlineStorage::hasBooks

Overrides BookOutlineStorageInterface::hasBooks

File

core/modules/book/src/BookOutlineStorage.php, line 36

Class

BookOutlineStorage

Defines a storage class for books outline.

Namespace

Code

public function hasBooks() {
    return (bool) $this->connection
        ->query('SELECT count([bid]) FROM {book}')
        ->fetchField();
}