symfony - Symfony2 choice field not working -

i asked question here how use repository custom functions in formtype nobody anwsered, did little digging , advanced little still error:

notice: object of class proxies\__cg__\kpr\centarzdravljabundle\entity\category  not converted int in /home/kprhr/public_html/cz_symfony/vendor/symfony/symfony/src/symfony/component/form/extension/core/choicelist/choicelist.php line 457  

now how categorytype looks like:

<?php  namespace kpr\centarzdravljabundle\form\type;  use symfony\component\form\abstracttype; use symfony\component\form\formbuilderinterface; use symfony\component\optionsresolver\optionsresolverinterface; use symfony\bridge\doctrine\registryinterface;  class categorytype extends abstracttype {     private $doctrine;      public function __construct(registryinterface $doctrine)     {         $this->doctrine = $doctrine;     }     public function setdefaultoptions(optionsresolverinterface $resolver)     {         $resolver->setdefaults(array(             'data_class' => 'kpr\centarzdravljabundle\entity\category',             'catid' => null,         ));     }     public function buildform(formbuilderinterface $builder, array $options)     {         $someid = $builder->getdata()->getid();         $param = ($someid) ? $someid : 0;         $catid = $options['catid'];         $builder->add('name', 'text', array('attr'   =>  array('class' => 'span6')));         $builder->add('file', 'file', array('image_path' => 'webpath', 'required' => false));         $builder->add('parent', 'choice', array(                     'choices' => $this->getallchildren($catid),                     'required' => false,                     'attr'   =>  array('data-placeholder' => '--izaberite opciju--'),                     ));         $builder->add('tags', 'tag_selector', array(             'required'  => false,         ));         $builder->add('status', 'choice', array(             'choices'   => array('1' => 'aktivna', '0' => 'neaktivna'),             'required'  => true,         ));         $builder->add('queue', 'text', array('attr'   =>  array('class' => 'span3')));     }     private function getallchildren($catid)     {         $choices = array();         $children = $this->doctrine->getrepository('kprcentarzdravljabundle:category')->findbyparenting($catid);          foreach ($children $child) {             $choices[$child->getid()] = $child->getname();         }          return $choices;     }      public function getname()     {         return 'category';     }  } 

i accessing categoryrepository function findbyparenting($parent) categorytype , getting array populated accurate data function getallchildren($catid) error there, think symfony framework expecting entity field instead of choice field, dont know how fix it. changet formcreate call in controller giving $this->getdoctrine() argument categorytype():

$form = $this->createform(new categorytype($this->getdoctrine()), $cat, array('catid' => $id)); 

ok managed resolve dilemma. answer easy had change

$builder->add('parent', 'choice', array(  'choices' => $this->getallchildren($catid),  'required' => false,  'attr'   =>  array('data-placeholder' => '--izaberite opciju--'), )); 

to this:

 $builder->add('parent', 'entity', array(                 'class' => 'kprcentarzdravljabundle:category',                 'choices' => $this->getallchildren($catid),                 'property' => 'name',                 'required' => false,                 'attr'   =>  array('data-placeholder' => '--izaberite opciju--'),                 )); 

and change getallchildren(..) function returns objects

private function getallchildren($catid) {     $choices = array();     $children = $this->doctrine->getrepository('kprcentarzdravljabundle:category')->findbyparenting($catid);      foreach ($children $child) {         $choices[$child->getid()] = $child->getname();     }      return $choices; } 

i changed to:

private function getallchildren($catid) {     $children = $this->doctrine->getrepository('kprcentarzdravljabundle:category')->findbyparenting($catid)      return $children; } 

lots of user redbirdo pointing out choices option on entity field.