php – 为什么我的doctrine2实体中的对象类型在调用persist()&am

$entity = new Meta();
    $obj = new stdClass();
    $obj->foo = 15;
    $obj->bar = 0;
    $obj->bor = true;
    $entity->setObject($obj);
    $em->persist($entity);
    $em->flush();

    $entity = $entityRepository->find(1);
    var_dump($entity);

收益：

object(JoModelEntity)[130]
  protected 'id' => int 1
  protected 'user' => null
  protected 'object' => 
    object(stdClass)[105]
      public 'foo' => int 15
      public 'bar' => int 0
      public 'bor' => boolean true

    $entity->getObject()->bar = 9;
    var_dump($entity);

收益：

object(JoModelEntity)[130]
  protected 'id' => int 1
  protected 'user' => null
  protected 'object' => 
    object(stdClass)[105]
      public 'foo' => int 15
      public 'bar' => int 9
      public 'bor' => boolean true

！

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

但是在刷新之后,实体不会在数据库中更新.

也许是因为我从getObject()方法设置新对象,它与引用有关,但我不明白为什么第二个var_dump()在对象中显示正确的值.

getter非常简单,只需返回私有属性即可.

任何想法,我都想了解这种行为.