public function BookOutlineStorage::hasBooks in Drupal 9

Same name and namespace in other branches

1. 8 core/modules/book/src/BookOutlineStorage.php \Drupal\book\BookOutlineStorage::hasBooks()

Checks if there are any books.

Return value

bool TRUE if there are books, FALSE if not.

Overrides BookOutlineStorageInterface::hasBooks

File

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

Class

BookOutlineStorage

Defines a storage class for books outline.

Namespace

Drupal\book

Code

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