我可以在Doctrine2中遍历实体的属性吗？ [英] Can I iterate over an Entity's properties in Doctrine2?

问题描述

我使用

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

我通过

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

echo $key . $value;

}

我如何获得字段名称？ key =>可以工作，但是它将s的密钥打印为0

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

所以我认为这可以工作：

so i thought this would work:

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

echo $key . $value;
}

但还是一无所有。.
}

but still nothing.. }

推荐答案

您的Blog实体的属性很可能被声明为受保护的 ，这就是为什么您不能从实体本身。

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Blog实体，并且只需要访问标记为@Columns的属性（读：yo您不需要在您的实体上调用任何方法），则可以考虑使用数组水化。这样，您将处理简单的数组，并且 $ k => $ v 类型迭代将可以正常工作。

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，您将需要在实体类上创建某种getValues（）方法。

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（）作为使用doctrine类的实用函数。元数据以找出列和实体具有什么，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;
}

编辑-上述版本的更成熟版本方法似乎是在此处可用-我没有玩过但是，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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