使用group()在magento中打破getSelectCountSql

Question

当我在使用

$collection->getSelect()->group('entity_id')

要么

$collection->groupByAttribute('entity_id')

它打破了getSelectCountSql,我得到1条记录和1页.Magento

$countSelect->columns('COUNT(DISTINCT e.entity_id)');

有办法解决吗？

我碰到它,同时重写Mage_Adminhtml_Block_Catalog_Product_Grid的_prepareCollection

谢谢

Answer 1

我更新了lib/Varien/Data/Collection/Db.php文件以允许这个,因为我必须让它工作.你必须跟踪这个升级,但它的工作原理.

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;
}