对于我的类别视图。我有一个选择下拉菜单，它使用 ajax 设置带有选项值的会话。
我已经覆盖了Mage_Catalog_Block_Product_List.
从 ajax 处理的这个会话值在“ protected function _getProductCollection()”覆盖中调用，以根据需要过滤产品集合。
我的第一个问题是我想根据这些属性上的三个值按一个属性进行过滤：
$collection = parent::_getProductCollection();
$collection ->addAttributeToFilter('name', array('in' => array('Cat','Adam', 'Paul')));
$collection->addAttributeToSort('name = Cat', 'DESC');
$collection->addAttributeToSort('name = Adam', 'DESC');
$collection->addAttributeToSort('name = Paul', 'DESC');
return $this->_productCollection;
问题是我想根据需要定位这些。例如，我首先需要 Cat，然后是 Adam，然后是 Paul。有没有办法定位这些？
第二个问题是我需要定位一个 ' sort by' 选项。' asc' 是默认值，但是我需要它降序为默认值。
到目前为止，我已经覆盖'Mage_Catalog_Block_Product_List_Toolbar'并使用了这段代码：
protected $_direction = 'desc';
然而，这并没有改变方向。
排序优先于我创建的自定义产品集合吗？
日志
a:5:{i:0;s:126:"SQLSTATE[42000]: 语法错误或访问冲突：1582 调用本机函数'FIND_IN_SET'时参数计数不正确";i:1;s:6707:"# 0 /var/www/vhosts/mydomain.com/httpdocs/mypath/lib/Varien/Db/Statement/Pdo/Mysql.php(110): Zend_Db_Statement_Pdo->_execute(Array) /var/www/vhosts/mydomain.com /httpdocs/mypath/lib/Zend/Db/Statement.php(300): Varien_Db_Statement_Pdo_Mysql->_execute(Array) /var/www/vhosts/mydomain.com/httpdocs/mypath/lib/Zend/Db/Adapter/Abstract. php(479): Zend_Db_Statement->execute(Array) /var/www/vhosts/mydomain.com/httpdocs/mypath/lib/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query('选择计数（DI ...'，数组）/var/www/vhosts/mydomain.com/httpdocs/mypath/lib/Varien/Db/Adapter/Pdo/Mysql.php（419）：Zend_Db_Adapter_Pdo_Abstract->query（'选择计数（DI ...'，数组）/var/www/vhosts/mydomain.com/httpdocs/mypath/lib/Zend/Db/Adapter/Abstract.php（825）：Varien_Db_Adapter_Pdo_Mysql->查询（对象（Varien_Db_Select） , 数组) /var/www/vhosts/mydomain.com/httpdocs/mypath/lib/Varien/Data/Collection/Db.php(225): Zend_Db_Adapter_Abstract->fetchOne(Object(Varien_Db_Select), 数组) /var/www/ vhosts/mydomain.com/httpdocs/mypath/lib/Varien/Data/Collection.php(225): Varien_Data_Collection_Db->getSize() /var/www/vhosts/mydomain.com/httpdocs/mypath/lib/Varien/Data/ Collection.php(211): Varien_Data_Collection->getLastPageNumber() /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Eav/Model/Entity/Collection/Abstract.php(1036) : Varien_Data_Collection->getCurPage() /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Eav/Model/Entity/Collection/Abstract.php(871):Mage_Eav_Model_Entity_Collection_Abstract->_loadEntities(false, false) /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Review/Model/Observer.php(78): Mage_Eav_Model_Entity_Collection_Abstract->load() / var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Core/Model/App.php(1334): Mage_Review_Model_Observer->catalogBlockProductCollectionBeforeToHtml(Object(Varien_Event_Observer)) /var/www/vhosts/ mydomain.com/httpdocs/mypath/app/code/core/Mage/Core/Model/App.php(1307): Mage_Core_Model_App->_callObserverMethod(Object(Mage_Review_Model_Observer), 'catalogBlockPro...', Object(Varien_Event_Observer)) / var/www/vhosts/mydomain.com/httpdocs/mypath/app/Mage.php(447): Mage_Core_Model_App->dispatchEvent('catalog_block_p...', Array) /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Catalog/Block/Product/List.php(163): Mage::dispatchEvent('catalog_block_p...', Array) /var/www/vhosts/mydomain. com/httpdocs/mypath/app/code/core/Mage/Core/Block/Abstract.php(862): Mage_Catalog_Block_Product_List->_beforeToHtml() /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/ core/Mage/Core/Block/Abstract.php(582): Mage_Core_Block_Abstract->toHtml() /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Core/Block/Abstract. php(526): Mage_Core_Block_Abstract->_getChildHtml('product_list', true) /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Catalog/Block/Category/View.php(85 ): Mage_Core_Block_Abstract->getChildHtml('product_list') /var/www/vhosts/mydomain.com/httpdocs/mypath/app/design/frontend/default/gomer/template/catalog/category/view。phtml(115): Mage_Catalog_Block_Category_View->getProductListHtml() /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Core/Block/Template.php(241): include('/var /www/vhosts...') /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('前端/defaul...') /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView() /var/ www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Core/Block/Abstract.php(863): Mage_Core_Block_Template->_toHtml() /var/www/vhosts/mydomain.com/httpdocs/ mypath/app/code/core/Mage/Core/Block/Text/List.php(43): Mage_Core_Block_Abstract->toHtml() /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/法师/核心/方块/Abstract.php(863)：Mage_Core_Block_Text_List->_toHtml() /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Core/Block/Abstract.php(582): Mage_Core_Block_Abstract->toHtml() /var/www /vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Core/Block/Abstract.php(526): Mage_Core_Block_Abstract->_getChildHtml('content', true) /var/www/vhosts/mydomain. com/httpdocs/mypath/app/design/frontend/default/gomer/template/page/2columns-left.phtml(49): Mage_Core_Block_Abstract->getChildHtml('content') /var/www/vhosts/mydomain.com/httpdocs /mypath/app/code/core/Mage/Core/Block/Template.php(241): include('/var/www/vhosts...') /var/www/vhosts/mydomain.com/httpdocs/mypath /app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/defaul...') /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView() /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/ core/Mage/Core/Block/Abstract.php(863): Mage_Core_Block_Template->_toHtml() /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Core/Model/Layout。 php(555): Mage_Core_Block_Abstract->toHtml() /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Core/Controller/Varien/Action.php(390): Mage_Core_Model_Layout-> getOutput() /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Catalog/controllers/CategoryController.php(159): Mage_Core_Controller_Varien_Action->renderLayout() /var/www/vhosts/ mydomain.com/httpdocs/mypath/app/code/core/Mage/Core/Controller/Varien/Action.php(419): Mage_Catalog_CategoryController->viewAction() /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('view') /var/www/vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Core/Controller/Varien/Front.php(176): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http)) /var/www /vhosts/mydomain.com/httpdocs/mypath/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch() /var/www/vhosts/mydomain.com/httpdocs/mypath /app/Mage.php(683): Mage_Core_Model_App->run(Array) /var/www/vhosts/mydomain.com/httpdocs/mypath/index.php(87): Mage::run('', 'store' ) {main}";s:3:"url";s:72:"/mypath/index.php/books-for-adults/autobiography-and-biography.html";s:11:"script_name";s:22:"/mypath/index.php";s:4:"skin";s:7:"english";}