doctrine2 - Entity field type symfony 2.0 - show data from database in edit action -

here situation:

i have 3 tables (one-to-many): product, productlabel, labeltag (label reserved -_-)

as may have guessed, product can have many labels.

now have form product shows labels available. new , create actions have been able show , save labels selected. problem comes when try display labels + show selected labels in edit action database.

some code:

entity product:

/**  * @var doctrine\common\collections\arraycollection $productlabels  *  * @orm\onetomany(targetentity="labeyrie\bundle\mainsitebundle\entity\productlabel", mappedby="product")  */ protected $productlabels; 

entity labeltag:

/**  * @var doctrine\common\collections\arraycollection $productlabels  *  * @orm\onetomany(targetentity="labeyrie\bundle\mainsitebundle\entity\productlabel", mappedby="labeltag")  */ protected $productlabels; 

entity productlabel:

/**  * @var labeyrie\bundle\mainsitebundle\entity\product $product  *   * @orm\id  * @orm\manytoone(targetentity="labeyrie\bundle\mainsitebundle\entity\product", inversedby="productlabels")  */ protected $product;  /**  * @var labeyrie\bundle\mainsitebundle\entity\labeltag $labeltag  *   * @orm\id  * @orm\manytoone(targetentity="labeyrie\bundle\mainsitebundle\entity\labeltag", inversedby="productlabels")  */ protected $labeltag; 

product form:

->add('productlabels', 'entity', array(             'class' => 'labeyriemainsitebundle:labeltag',             'property' => 'title',             'multiple' => true,             'expanded' => true,         )) 

here how saved in create action:

if ($form->isvalid()) {         /* save product */         $em->persist($product);         $em->flush();          /* save product labels */         $labels = $product->getproductlabels();         if (!empty($labels)) {             foreach ($labels $label) {                 $productlabel = new productlabel();                 $productlabel->setlabeltag($label);                 $productlabel->setproduct($product);                  $em->persist($productlabel);             }         }         $em->flush();     } 

no problem that.

problem in edit action:

$entity = $em->getrepository('myprojectbundle:product')->find($id));         $form = $this->createform(new producttype(), $entity); 

if render form, see labels, information ones have been selected not transmitted (since in middle table manage) , not shown.

i need solution using one-to-many architecture. form configuration wrong? please help. :)

i found answer:

simply need following:

    $collection = new arraycollection();     $labels = $entity->getproductlabels();     if (!empty($labels)) {         foreach ($labels $label) {             $collection->add($label->getlabeltag());         }     }      $form->get('productlabels')->setdata($collection);  

retrieve individual object (labeltag), put in array collection, pass collection form field's data , done.

the form displayed , selected options shown.