我可以在 Doctrine2 中迭代实体的属性吗?

2022-01-16 00:00:00 php doctrine doctrine-orm

我用

$myblogrepo = $this->_doctrine->getRepository('EntitiesBlog')->findBy(array('id' => 12);

我通过

foreach($myblogrepo as $key =>$value){

echo $key . $value;

}

如何获取字段名称?我认为 key => 会起作用，但它会将 key 打印为 0

how can i get the field names? i thought the key => would work but it print s the key as 0

所以我认为这会起作用:

so i thought this would work:

foreach($myblogrepo[0] as $key =>$value){

echo $key . $value;
}

但还是什么都没有..}

but still nothing.. }

推荐答案

很可能，您的 Blog 实体的属性被声明为 protected.这就是为什么你不能从实体本身之外迭代它们.

In all likelihood, your Blog entity's properties are declared as protected. This is why you can't iterate over them from outside the the Entity itself.

如果您以只读方式使用博客实体，并且只需要访问标记为 @Columns 的属性(阅读:您不需要调用实体上的任何方法)，您可以考虑使用阵列水合.这样你就可以处理简单的数组，并且 $k=>$v 类型的迭代可以正常工作.

If you're using your Blog entities in a read-only fashion, and only need access to the properties marked as @Columns (read: you don't need to call any methods on your entity), you might consider using array-hydration. That way you'll be dealing with simple arrays, and $k=>$v type iteration will work fine.

否则，您需要在实体类上创建某种 getValues() 方法.这可能是一个简单的实现，只需构建和排列并返回它.

Otherwise, you'll need to create some kind of getValues() method on your entity class. This could be a simple implementation that just builds and array and returns it.

最后，您可以创建一个通用的 getValues() 作为实用函数，它使用学说的类元数据来确定哪些列和实体具有，并对这些数据进行操作.像这样的简单实现:

Finally, you could create a general-purpose getValues() as a utility function that uses doctrine's class metadata to figure out what columns and entity has, and operate on those data. A simple implementation like this:

function getEntityColumnValues($entity,$em){
  $cols = $em->getClassMetadata(get_class($entity))->getColumnNames();
  $values = array();
  foreach($cols as $col){
    $getter = 'get'.ucfirst($col);
    $values[$col] = $entity->$getter();
  }
  return $values;
}

EDIT - 上述方法的一个更成熟的版本似乎是 在此处可用 - 我还没有玩过它，但它看起来很有希望.

EDIT - A more mature version of the above method seems to be available here - I've not played with it yet, but it looks promising.

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