选择列magento

Question

我想知道如何选择列。在上面你可以看到我想要写入控制器的sql。但我想以这种方式做到这一点。像其他在magento中的sql语句一样。

我试图添加 - >列（'o.sku AS SKU'），但这没有奏效。

任何想法？提前致谢！

//sql 
$readresult="SELECT o.name AS 'Product', o.sku AS 'SKU', c.entity_id AS 'Order', c.customer_email AS 'Email', c.customer_firstname AS 'Voornaam', c.customer_lastname AS 'Achternaam', c.customer_middlename AS 'Tussenvoegsel', o.product_options AS 'Options', a.telephone AS 'Telefoon', a.postcode AS 'Postcode', a.street AS 'Street', a.city AS 'City', c.increment_id AS 'Bestelnr' FROM magento_sales_flat_order AS c INNER JOIN magento_sales_flat_order_item AS o ON c.entity_id = o.order_id INNER JOIN magento_sales_flat_order_address AS a ON a.parent_id = c.entity_id WHERE o.product_id =".$product." GROUP BY c.entity_id ORDER BY o.sku;"; 


//THE MAGENTO WAY! 
$resource = Mage::getSingleton('core/resource'); 
$read = $resource->getConnection('core_read'); 
$o = $resource->getTableName('magento_sales_flat_order'); 
$o_item = $resource->getTableName('magento_sales_flat_order_item'); 
$o_address = $resource->getTableName('magento_sales_flat_order_address'); 
$select = $read->select()->from(array('c'=>$o)) 
    ->join(array('o'=>$o_item), 'c.entity_id = o.order_id', array(o.sku AS 'SKU')) 
    ->join(array('a'=>$o_address), 'a.parent_id = c.entity_id', array()) 
    ->where('o.product_id', $product) 
    ->group('c.entity_id') 
    ->order('o.sku'); 

Answer 1

你不应该像核心模块那样工作。那些低级SQL查询应该由资源模型仅使用使用。尤其不在控制器内。

您应该通过致电Mage::getModel('sales/order')->getCollection()获得Mage_Sales_Model_Resource_Order_Collection的实例并从那里构建您的查询。只需查看源代码，即可了解如何完成此操作;从app/code/core/Mage/Sales/Model/Resource/Order/Collection.php开始，沿着继承链继续前进。

例如，您可以使用$collection->addAttributeToSearchFilter()之类的内容添加WHERE。

Magento得到了很好的数据库抽象，你肯定会使用它。

希望这会有所帮助。