Update entity Many-to-Many relation SonataAdmin - symfony

Question

I have 5 Entities
Entity\Book:
class Book
{
/**
* #var integer
*
* #ORM\Column(name="b_id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="IDENTITY")
*/
private $bId;
/**
* #var string
*
* #ORM\Column(name="b_foto", type="string", length=255, nullable=true)
*/
private $bFoto;
/**
* #var string
*
* #ORM\Column(name="b_title", type="string", length=255, nullable=false)
*/
private $bTitle;
public $author;
public $heading;
}
Entity\Author
/**
* Author
*
* #ORM\Table(name="author")
* #ORM\Entity
*/
class Author
{
/**
* #var integer
*
* #ORM\Column(name="a_id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="IDENTITY")
*/
private $aId;
/**
* #var string
*
* #ORM\Column(name="a_firstname", type="string", length=100, nullable=false)
*/
private $aFirstname;
/**
* #var string
*
* #ORM\Column(name="a_lastname", type="string", length=100, nullable=false)
*/
private $aLastname;
}
Entity\Heading
/**
* Heading
*
* #ORM\Table(name="heading")
* #ORM\Entity
*/
class Heading
{
/**
* #var integer
*
* #ORM\Column(name="h_id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="IDENTITY")
*/
private $hId;
/**
* #var string
*
* #ORM\Column(name="h_title", type="string", length=100, nullable=false)
*/
private $hTitle;
}
Entity\BooksAuthor
/**
* BooksAuthor
*
* #ORM\Table(name="books_author", indexes={#ORM\Index(name="book_in", columns={"b_id"}), #ORM\Index(name="author_in", columns={"a_id"})})
* #ORM\Entity
*/
class BooksAuthor
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* #var \AppBundle\Entity\Book
*
* #ORM\ManyToOne(targetEntity="AppBundle\Entity\Book")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="b_id", referencedColumnName="b_id")
* })
*/
private $b;
/**
* #var \AppBundle\Entity\Author
*
* #ORM\ManyToOne(targetEntity="AppBundle\Entity\Author")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="a_id", referencedColumnName="a_id")
* })
*/
private $a;
}
Entity\BooksHeading
class BooksHeading
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* #var \AppBundle\Entity\Heading
*
* #ORM\ManyToOne(targetEntity="AppBundle\Entity\Heading")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="h_id", referencedColumnName="h_id")
* })
*/
private $h;
/**
* #var \AppBundle\Entity\Book
*
* #ORM\ManyToOne(targetEntity="AppBundle\Entity\Book")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="b_id", referencedColumnName="b_id")
* })
*/
private $b;
}
I use SonataAdmin and when I update my Entity\Book I want to update and another Entities.
That`s my BookAdmin
namespace AppBundle\Admin;
use Sonata\AdminBundle\Admin\Admin;
use Sonata\AdminBundle\Datagrid\ListMapper;
use Sonata\AdminBundle\Datagrid\DatagridMapper;
use Sonata\AdminBundle\Form\FormMapper;
class BookAdmin extends Admin
{
// Fields to be shown on create/edit forms
protected function configureFormFields(FormMapper $formMapper)
{
$formMapper
->add('bTitle', null , array('label' => 'Название'))
->add('author', 'sonata_type_model', array('class' => 'AppBundle\Entity\Author',
'label'=>"Авторы",
'multiple'=>true,
'required'=>false,
'multiple'=>true,
'expanded'=> true,
'by_reference' => false,),
array(
'edit' => 'inline',
'inline' => 'table',
'sortable' => 'position')
)
->add('heading', 'sonata_type_model', array('class' => 'AppBundle\Entity\Heading',
'label'=>'Рубрика',
'required'=>false,
'multiple'=>true,
'expanded'=> true,
'by_reference' => false,),
array(
'edit' => 'inline',
'inline' => 'table',
'sortable' => 'id',))
->add('bFoto','file',array('label'=>'Обложка',
'data_class'=> null,
'required'=>false,
))
;
}
// Fields to be shown on filter forms
protected function configureDatagridFilters(DatagridMapper $datagridMapper)
{
$datagridMapper
//->add('author', null , array('label' => 'Автор',
// 'class' => 'AppBundle\Entity\BookAuthor',
// ))
//->add('heading', null, array('label' => 'Рубрика',
//'class' => 'AppBundle\Entity\BookHeading',
//))
;
}
// Fields to be shown on lists
protected function configureListFields(ListMapper $listMapper)
{
$listMapper
->addIdentifier('b_id', null, array('label' => 'ID'))
->add('bTitle', null , array('label' => 'Название'))
;
}
}
Can you help me?

Answer 1

You need to indicate the cascade type in your entities BooksHeading and BooksAuthor,
Try this:
#ORM\ManyToOne(targetEntity="AppBundle\Entity\Heading", casccade="persist")