为什么我的关系不想工作？

Question

我有两个实体Skill及其类型SkillType。的关系看起来如下：

/** 
* @ORM\Entity 
* @ORM\Table(name="skills") 
*/ 
class Skill 
{ 
    /** 
    * @ORM\Id 
    * @ORM\Column(type="integer") 
    * @ORM\GeneratedValue(strategy="AUTO") 
    */ 
    protected $id; 

    /** 
    * @var SkillType 
    * @ORM\ManyToOne(targetEntity="SkillType", inversedBy="skills") 
    * @ORM\JoinColumn(name="type_id", referencedColumnName="id") 
    */ 
    protected $type; 

    //Getters and Setters 
} 

/** 
* @ORM\Entity 
* @ORM\Table(name="skill_types") 
*/ 
class SkillType 
{ 
    /** 
    * @ORM\Id 
    * @ORM\Column(type="integer") 
    * @ORM\GeneratedValue(strategy="AUTO") 
    */ 
    protected $id; 

    /** 
    * @var Skill[]|ArrayCollection 
    * @ORM\OneToMany(targetEntity="AppBundle\Entity\Skill", mappedBy="type") 
    */ 
    protected $skills; 

    /** 
    * SkillType constructor. 
    */ 
    public function __construct() 
    { 
     $this->skills = new ArrayCollection(); 
    } 

    //Getters and Setters 
} 

我也表单创建beetwen这两

class SkillType extends AbstractType 
{ 
    /** 
    * @inheritDoc 
    */ 
    public function buildForm(FormBuilderInterface $builder, array $options) 
    { 
     $builder 
      ->add('type', EntityType::class, [ 
       'multiple' => false, 
       'class' => 'AppBundle\Entity\SkillType', 
       'choice_label' => 'id', 
       'by_reference' => false 
      ]); 
    } 

    /** 
    * @inheritDoc 
    */ 
    public function configureOptions(OptionsResolver $resolver) 
    { 
     $resolver->setDefaults([ 
      'data_class' => 'AppBundle\Entity\Skill', 
     ]); 
    } 
} 

的关系我如何试图修正这个错误？

1. 添加, cascade={"persist"}来映射两边也两侧
2. 添加$entityManager->merge($entity);以前createForm(SkillType::class, $entity

我的要求的内容看起来如下：{"skill":{"type":1},"id":"1"}。因此，您可以看到它应该创建Skill与id=1和SkillType与id=1之间的关系。

我得到当我提交表单是错误：

实体传递到选择现场必须加以管理。也许坚持他们在实体经理？

堆栈跟踪：

Symfony\Component\Form\Exception\RuntimeException: Entities passed to the choice field must be managed. Maybe persist them in the entity manager? 
at n/a 
    in /var/www/public_html/api-hb/vendor/symfony/symfony/src/Symfony/Bridge/Doctrine/Form/ChoiceList/IdReader.php line 119 

at Symfony\Bridge\Doctrine\Form\ChoiceList\IdReader->getIdValue(object(SkillType)) 
    in /var/www/public_html/api-hb/vendor/symfony/symfony/src/Symfony/Bridge/Doctrine/Form/ChoiceList/DoctrineChoiceLoader.php line 122 

at Symfony\Bridge\Doctrine\Form\ChoiceList\DoctrineChoiceLoader->loadValuesForChoices(array(object(SkillType)), array(object(IdReader), 'getIdValue')) 
    in /var/www/public_html/api-hb/vendor/symfony/symfony/src/Symfony/Component/Form/ChoiceList/LazyChoiceList.php line 134 

at Symfony\Component\Form\ChoiceList\LazyChoiceList->getValuesForChoices(array(object(SkillType))) 
    in /var/www/public_html/api-hb/vendor/symfony/symfony/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoiceToValueTransformer.php line 37 

at Symfony\Component\Form\Extension\Core\DataTransformer\ChoiceToValueTransformer->transform(object(SkillType)) 
    in /var/www/public_html/api-hb/vendor/symfony/symfony/src/Symfony/Component/Form/Form.php line 1092 

at Symfony\Component\Form\Form->normToView(object(SkillType)) 
    in /var/www/public_html/api-hb/vendor/symfony/symfony/src/Symfony/Component/Form/Form.php line 352 

at Symfony\Component\Form\Form->setData(object(SkillType)) 
    in /var/www/public_html/api-hb/vendor/symfony/symfony/src/Symfony/Component/Form/Extension/Core/DataMapper/PropertyPathMapper.php line 57 

at Symfony\Component\Form\Extension\Core\DataMapper\PropertyPathMapper->mapDataToForms(object(Skill), object(RecursiveIteratorIterator)) 
    in /var/www/public_html/api-hb/vendor/symfony/symfony/src/Symfony/Component/Form/Form.php line 385 

at Symfony\Component\Form\Form->setData(object(Skill)) 
    in /var/www/public_html/api-hb/vendor/symfony/symfony/src/Symfony/Component/Form/Form.php line 477 

at Symfony\Component\Form\Form->initialize() 
    in /var/www/public_html/api-hb/vendor/symfony/symfony/src/Symfony/Component/Form/FormBuilder.php line 226 

at Symfony\Component\Form\FormBuilder->getForm() 
    in /var/www/public_html/api-hb/vendor/symfony/symfony/src/Symfony/Component/Form/FormFactory.php line 39 

Answer 1

我想这可能是DB模式错误。首先检查你的数据库结构，如果我是正确的问题可能发生在那里。我的概念是删除这个关系，运行主义架构更新并再次创建这个关系。

我认为只有在一个实体中出现此错误的原因未在数据库中正确反映，因为原则无法正确处理模式更新。