从customer_entity_varchar添加数据以订购网格magento

Question

我正在尝试添加'accountno'字段来从customer_entity_varchar表中订购网格。为了实现这一点，我改变了Grid.php中的_prepareCollection（）方法，如下所示：

 protected function _prepareCollection()
    {

        $collection = Mage::getResourceModel($this->_getCollectionClass());

           $customerEntityVarchar = Mage::getSingleton('core/resource')->getTableName('customer_entity_varchar');

            $collection->getSelect()->join(array(
                'customer_entity_varchar_table'=>$customerEntityVarchar), 
                '`main_table`.`customer_id`=`customer_entity_varchar_table`.`entity_id`
                    AND `customer_entity_varchar_table`.`attribute_id`=122', 
                array('accountno' => 'value')); 

            print_r($collection->getSelect()->__toString());
            $this->setCollection($collection);
            return parent::_prepareCollection();

    }

  

在attribute_id =122' 122 is the attribute_id of accountno`

中

当我print_r选择查询并在phpmyadmin中执行它时，它会得到准确的结果，但是当我尝试在_prepareColumns（）方法中将列添加到网格时，它会将该字段显示为空白。 我的_prepareColumns方法如下所示：

protected function _prepareColumns()
    {
         $this->addColumn('real_order_id', array(
            'header'=> Mage::helper('sales')->__('Order #'),
            'width' => '80px',
            'type'  => 'text',
            'index' => 'increment_id',
        ));

          $this->addColumnAfter('accountno', array(
                'header' => Mage::helper('sales')->__('Account No'),
                'index' => 'accountno',       
            ), 'real_order_id');
//rest of the code here
      }