php – Symfony ManyToMany表单

我有实体技能和语言,专业,平台实体与ManyToMany的关系,当我创建技能时,我选择语言,平台和表格是有效的,正常持久和在DB中刷新.但是,当我创建语言或专业或平台时,我有错误此值无效并且在调试面板中.为什么我不明白,请帮忙：

Message Origin  Cause
This value is not valid.    skills  SymfonyComponentValidatorConstraintViolation
Object(SymfonyComponentFormForm).children[skills] = [0 => AngularJS,1 => API]

Caused by:

SymfonyComponentFormExceptionTransformationFailedException
Unable to reverse value for property path "skills": Could not find all matching choices for the given values

Caused by:

SymfonyComponentFormExceptionTransformationFailedException
Could not find all matching choices for the given values

在我删除的实体中

/**
 * Constructor
 */
public function __construct()
{
    $this->language = new DoctrineCommonCollectionsArrayCollection();
    $this->platforms = new DoctrineCommonCollectionsArrayCollection();
    $this->specialities = new DoctrineCommonCollectionsArrayCollection();
}

并且在语言,平台上也被删除了

实体：

class Skill
{
use Timestampable;
/**
 * @var integer
 *
 * @ORMColumn(name="id",type="integer")
 * @ORMId
 * @ORMGeneratedValue(strategy="AUTO")
 */
private $id;

/**
 * @var MyBundleEntityCodeDirectoryProgramLanguages
 *
 * @ORMManyToMany(targetEntity="CodeDirectoryProgramLanguages",inversedBy="skills",cascade={"persist"})
 */
protected $language;

/**
 * @var MyBundleEntityCodeDirectoryPlatforms
 *
 * @ORMManyToMany(targetEntity="CodeDirectoryPlatforms",cascade={"persist"})
 */
protected $platforms;

/**
 * @var MyBundleEntityCodeDirectorySpecialities
 *
 * @ORMManyToMany(targetEntity="CodeDirectorySpecialities",cascade={"persist"})
 */
protected $specialities;

一个例子：

class CodeDirectorySpecialities
{
use Timestampable;
/**
 * @var integer
 *
 * @ORMColumn(name="id",type="integer")
 * @ORMId
 * @ORMGeneratedValue(strategy="AUTO")
 */
private $id;

/**
 * @var string
 *
 * @ORMColumn(name="specialities",type="string",length=255)
 */
private $specialities;

/**
 * @ORMManyToMany(targetEntity="MyBundleEntitySkill",mappedBy="specialities",cascade={"persist"})
 */
protected $skills;

并添加到所有实体

public function __toString()
{
    return $this->string_filed_entity;
}

这是我的表格

public function buildForm(FormBuilderInterface $builder,array $options)
{
    $builder
        ->add('specialities');

            $builder->add('skills','entity',array(
                    'class'=>'MyBundleEntitySkill','property'=>'skill','multiple'=>true,'expanded' => true,)
            );
}

和行动

$entity = new CodeDirectorySpecialities();
    $form = $this->createCreateForm($entity);
    $form->handleRequest($request);

    if ($form->isValid()) {
        $em = $this->getDoctrine()->getManager();

            $skills = $entity->getSkills()->getValues();
        if(!empty($skills)){
            foreach($skills as $skill){
                $skill->addSpeciality($entity);
                $em->persist($skill);
            }
        }

        $em->persist($entity);
        $em->flush();

        return $this->redirect($this->generateUrl('specialities_show',array('id' => $entity->getId())));
    }

public function buildForm(FormBuilderInterface $builder,array $options)
{
    $builder
        ->add('specialities')
        ->add('skills',array(
            'class' => 'AppBundleEntitySkill','property' => 'skill','multiple' => true,'expanded' => true
          ))
    ;
}

$entity = new CodeDirectorySpecialities();
$form = $this->createCreateForm($entity);
$form->handleRequest($request);

if ($form->isValid()) {
    $em = $this->getDoctrine()->getManager();

    $entity = $form->getData();
    $em->persist($entity);
    $em->flush();

    return $this->redirect($this->generateUrl('specialities_show',array('id' => $entity->getId())));
}