Untitled

Doctrine Fixtures: getOrder() with Join Tables
$book1->addBookAuthor($manager->merge($this->getReference('book-author-1')));

$bookAuthor1->setBook($manager->merge($this->getReference('book-1')));

/**
 * @ORMOneToMany(targetEntity="yourbundleEntityBookAuthor",mappedBy="book", cascade={"persist", "remove"})
 */
protected $book_authors;

// [...]
$book = new Book();
$book->setTitle( 'xxx' )
// Set more data...
$book_author = new BookAuthor();
$book_author->setAuthor( $manager->merge($this->getReference('author-1')) );
$book_author->setBook( $book );
$book->addBookAuthor( $book_author );

$em->persist( $book );

// [...]