Doctrine ORM,两个不同的查询产生相同的结果集

Question

我正在使用Doctrine 1.2和Symfony 1.4.

在我的操作中,我有两个不同的查询返回不同的结果集.不知怎的,第二个查询似乎改变了第一个查询的结果(或引用？),我没有任何线索为什么..

这是一个例子:

  $this->categories = Doctrine_Query::create()
       ->from('Categorie AS c')
       ->innerJoin('c.Activite AS a')
       ->where('a.archive = ?', false)
       ->execute();

  print_r($this->categories->toArray()); // Return $this->categories results, normal behavior.

  $this->evil_query = Doctrine_Query::create()
       ->from('Categorie AS c')
       ->innerJoin('c.Activite AS a')
       ->where('a.archive = ?', true)
       ->execute();

  print_r($this->categories->toArray()); // Should be the same as before, but it return $this->evil_query results instead!

为什么Doctrine这样做？这让我疯狂.谢谢!

为简单起见,似乎查询2正在劫持查询1结果.

Answer 1

在查询之间使用类似的东西($em- 实体管理器):

$em->clear(); // Detaches all objects from Doctrine!

http://docs.doctrine-project.org/en/2.0.x/reference/batch-processing.html