我在 magento 的产品表中添加了自定义字段。我想使用该自定义字段进行排序，但不会。不知道是什么问题。。
$_cproduct = Mage::getmodel('catalog/product');
$_productCollection = $_cproduct->getCollection();
$_productCollection->addAttributeToSelect('name')->addAttributeToSelect('expired')->addAttributeToSelect('dealcategory')->addAttributeToSelect('dealcity')->addAttributeToSelect('deal_position')->addAttributeToSelect('special_to_date')->addAttributeToSelect('title')->setStore(Mage::app()->getStore()->getId())->addStoreFilter(Mage::app()->getStore()->getId())->addAttributeToSort('entity_id', 'DESC')->addAttributeToSort('dealcategory', 'DESC');
$_productCollection->addAttributeToFilter('status', 1)->addAttributeToFilter('expired', 0);
$_productCollection->addAttributeToFilter('dealcategory', array('in' => array(129, 135, 136, 137, 141, 156, 205)));
$now = Mage::getModel('core/date')->timestamp(time());
$dateStart = date('Y-m-d' . ' 00:00:00', $now);
$_productCollection->addFieldToFilter('special_to_date', array('from' => $dateStart));
$dealcity = Mage::app()->getRequest()->getParam('dealcity', false);
$_productCollection->addAttributeToSort('deal_position', 'ASC');
echo "<pre>";
print_r($_productCollection->getData());
echo "</pre>";
但是每次我得到像下面这样的异常订单时，我都想根据“ deal_position”排序
Array
(
[0] => Array
(
[entity_id] => 2568
[entity_type_id] => 10
[attribute_set_id] => 9
[type_id] => virtual
[sku] => comedybar7/2/12
[created_at] => 2012-07-02 18:36:22
[updated_at] => 2012-10-16 09:52:41
[has_options] => 0
[required_options] => 0
[dealcategory_value] => Side travel deal
[status] => 1
[expired] => 0
[dealcategory] => 135
[special_to_date] => 2012-10-25 00:00:00
[deal_position] => 4
)
[1] => Array
(
[entity_id] => 2566
[entity_type_id] => 10
[attribute_set_id] => 9
[type_id] => virtual
[sku] => livingwellfinal
[created_at] => 2012-06-28 14:48:34
[updated_at] => 2012-10-16 09:51:58
[has_options] => 0
[required_options] => 0
[dealcategory_value] => Side Deal
[status] => 1
[expired] => 0
[dealcategory] => 129
[special_to_date] => 2012-11-30 00:00:00
[deal_position] => 1
)
[2] => Array
(
[entity_id] => 2565
[entity_type_id] => 10
[attribute_set_id] => 9
[type_id] => simple
[sku] => laser-toenail-10-toes
[created_at] => 2012-06-27 21:10:19
[updated_at] => 2012-10-16 09:52:23
[has_options] => 0
[required_options] => 0
[dealcategory_value] => Side Deal
[status] => 1
[expired] => 0
[dealcategory] => 129
[special_to_date] => 2012-11-30 00:00:00
[deal_position] => 3
)
[3] => Array
(
[entity_id] => 2564
[entity_type_id] => 10
[attribute_set_id] => 9
[type_id] => simple
[sku] => laser-toenail-5-toes
[created_at] => 2012-06-27 21:10:19
[updated_at] => 2012-10-16 09:52:10
[has_options] => 0
[required_options] => 0
[dealcategory_value] => Side Deal
[status] => 1
[expired] => 0
[dealcategory] => 129
[special_to_date] => 2012-12-31 00:00:00
[deal_position] => 2
)
)
我使用addOrder()它也返回相同的输出。问题是什么？