forms - Symfony2 - Entities not linking via ManyToMany -

i have 2 entities, reply , post.

these linked manytomany post being owner.

i have created form reply add new replies post, reason replies not showing in loop in twig.

in database new replies listed , saved yet it's not displaying?

i've setup fixtures linking replies posts , displays fine in loop, not new replies created in form?

what missing here?

replyform

public function buildform(formbuilderinterface $builder, array $options) {     $builder         ->add('author')         ->add('body')         ->add('post', 'submit'); }  public function setdefaultoptions(optionsresolverinterface $resolver) {     $resolver->setdefaults(array(         'data_class' => 'acme\demobundle\entity\reply'     )); }  public function getname() {     return 'acme_demobundle_reply'; } 

twig

{% reply in post.replies %}     <hr>     <p><small>reply <em>{{ reply.author.name }}</em> on {{ reply.createdat|date }}</small></p>     <p>{{ reply.body }}</p>  {% endfor %} 

controller

public function createreplyaction(request $request, $slug) {     $post = $this->getdoctrine()->getrepository('acmedemobundle:post')         ->findoneby(array(            'slug' => $slug         ));      if (null == $post) {         throw $this->createnotfoundexception('post not found');     }      $reply = new reply();     $reply->addpost($post);      $form = $this->createform(new replytype(), $reply);     $form->handlerequest($request);      if ($form->isvalid()) {         $this->getdoctrine()->getmanager()->persist($reply);         $this->getdoctrine()->getmanager()->flush();          return $this->redirect($this->generateurl('acme_core_post_show', array(             'slug' => $slug         )));     }      return array(         'post' => $post,         'form' => $form->createview()     ); } 

reply entity

/**  * @orm\manytomany(targetentity="post", mappedby="replies")  */ protected $post;  /**  * constructor  */ public function __construct() {     $this->post = new \doctrine\common\collections\arraycollection(); }  /**  * add post  *  * @param \acme\demobundle\entity\post $post  * @return reply  */ public function addpost(\acme\demobundle\entity\post $post) {     $this->post[] = $post;      return $this; }  /**  * remove post  *  * @param \acme\demobundle\entity\post $post  */ public function removepost(\acme\demobundle\entity\post $post) {     $this->post->removeelement($post); }  /**  * post  *  * @return \doctrine\common\collections\collection   */ public function getpost() {     return $this->post; } 

post entity

/**  * @return array collection  *  * @orm\manytomany(targetentity="reply", inversedby="post")  * @jointable(name="posts_replies",  *      joincolumns={@joincolumn(name="post_id", referencedcolumnname="id")},  *      inversejoincolumns={@joincolumn(name="reply_id", referencedcolumnname="id")}  *      )  */ protected $replies;  /**  * constructor  */ public function __construct() {     $this->replies = new \doctrine\common\collections\arraycollection(); }  /**  * add replies  *  * @param \acme\demobundle\entity\reply $replies  * @return post  */ public function addreply(\acme\demobundle\entity\reply $replies) {     $replies->addpost($this);      $this->replies[] = $replies;      return $this; }  /**  * remove replies  *  * @param \acme\demobundle\entity\reply $replies  */ public function removereply(\acme\demobundle\entity\reply $replies) {     $this->replies->removeelement($replies); }  /**  * replies  *  * @return \doctrine\common\collections\collection   */ public function getreplies() {     return $this->replies; } 

remove following:

$replies->addpost($this); post entity

and add in

$post->addreply($this); under addpost reply entity.