magento管理产品网格将类别筛选器添加到管理网格，而不添加列

我正在尝试在不添加类别列的情况下按类别筛选网格，是否有一种方法可以对网格执行此自定义筛选

下面是我所做的

function prepareCollection()
{
$catIdArray = getRequest()->getParam('cat_id');
//i.e  $catIdArray = array(26, 27, 17);

$collection = Mage::getModel('catalog/product')->getCollection(); 

$collection->joinField(
    'category_id',
    'catalog/category_product',
    'category_id',
    'product_id=entity_id',
    null,
    'left'
)
->addAttributeToFilter( 
    'category_id',
    array('in' => $catIdArray)
)
->addAttributeToSelect('*');
$this->setCollection($collection);

---

这里的过滤器工作正常，但分页在这种情况下不起作用。请告诉我我做错了什么？？？

为了在扩展Magento后台办公室中的网格后修复分页，您需要扩展lib/Varien/Data/Collection/Db.php

将Db.php复制到路径app/code/local/Varien/Data/Collection/Db.php，并将函数

getSelectCountSql

替换为以下内容：-

public function getSelectCountSql()
{   
    $this->_renderFilters();
    $countSelect = clone $this->getSelect();
    $countSelect->reset(Zend_Db_Select::ORDER);
    $countSelect->reset(Zend_Db_Select::LIMIT_COUNT);
    $countSelect->reset(Zend_Db_Select::LIMIT_OFFSET);
    $countSelect->reset(Zend_Db_Select::COLUMNS);

    // Count doesn't work with group by columns keep the group by 
    if(count($this->getSelect()->getPart(Zend_Db_Select::GROUP)) > 0) {
        $countSelect->reset(Zend_Db_Select::GROUP);
        $countSelect->distinct(true);
        $group = $this->getSelect()->getPart(Zend_Db_Select::GROUP);
        $countSelect->columns("COUNT(DISTINCT ".implode(", ", $group).")");
    } else {
        $countSelect->columns('COUNT(*)');
    }
    return $countSelect;
}

---

为了在Magento后台扩展网格后修复分页，您需要扩展lib/Varien/Data/Collection/Db.php

将Db.php复制到路径app/code/local/Varien/Data/Collection/Db.php，并将函数

getSelectCountSql

替换为以下内容：-

public function getSelectCountSql()
{   
    $this->_renderFilters();
    $countSelect = clone $this->getSelect();
    $countSelect->reset(Zend_Db_Select::ORDER);
    $countSelect->reset(Zend_Db_Select::LIMIT_COUNT);
    $countSelect->reset(Zend_Db_Select::LIMIT_OFFSET);
    $countSelect->reset(Zend_Db_Select::COLUMNS);

    // Count doesn't work with group by columns keep the group by 
    if(count($this->getSelect()->getPart(Zend_Db_Select::GROUP)) > 0) {
        $countSelect->reset(Zend_Db_Select::GROUP);
        $countSelect->distinct(true);
        $group = $this->getSelect()->getPart(Zend_Db_Select::GROUP);
        $countSelect->columns("COUNT(DISTINCT ".implode(", ", $group).")");
    } else {
        $countSelect->columns('COUNT(*)');
    }
    return $countSelect;
}