symfony 1.4推进1.6:总和

Question

我试图在推进中获得一列列.我的代码

$c = new Criteria();
$c->add(valuePeer::OWNER_ID, $this->getId());
$c->addSelectColumn('SUM(' . valuePeer::VALUE . ') as total');
$c->addGroupByColumn(valuePeer::VALUE);

$sum = valuePeer::DoSelect($c);

打印输出$sum什么都不返回(甚至不是空对象).我得到的只是Notice: Undefined offset: 1 in /.../lib/model/om/BaseValue.php on line 203 Notice: Undefined offset: 2 in /.../lib/model/om/BaseValue.php on line 204

我试着用这种方法::DoSelectRS($c)的建议在这里和其他多种讨论,但我得到一个错误:Fatal error: Call to undefined method ValuePeer::DoSelectRS() in /.../lib/model/Restauracia.php on line 39.

有谁能告诉我这方面的正确方法是什么？

Answer 1

为什么不使用新的ModelCriteria而不是旧的详细的？

$sum = ValueQuery::create()
  ->select(array('total'))
  ->filterByOwnerId($this->getId())
  ->withColumn('SUM(Value.Value)', 'total')
  ->find();

将返回如下内容:

PropelArrayCollection(
  array('total' => 25)
)