在卢阿打印一个斜线字符(printing a slash character in lua)

 基本上，有两种方法可以做到这一点。 将该字段添加到集合中并从数据库中获取数据，或者根据从DB返回的3个值在PHP中计算它。 在我看来，使用Magento Collection的第一种方式太复杂了。 相反，你想使用渲染器（ Mage_Adminhtml_Block_Widget_Grid_Column_Renderer_Abstract ） 
 
 首先，在插件的Block/Adminhtml文件夹中，创建一个名为Renderer的新文件夹。 在其中创建一个名为CostSum.php的新文件， CostSum.php包含以下内容： 
 
<?php 
class Company_Module_Block_Adminhtml_Renderer_CostSum extends Mage_Adminhtml_Block_Widget_Grid_Column_Renderer_Abstract
{
    public function render(Varien_Object $row)
    {
         return $row->getStampCost() + $row->getInkCost() + $row->getFormCost();
    }
}
 
 然后，在网格中，创建一个新列 
 
$this->addColumn('cost_total', array(
    'header'    => Mage::helper('imprint')->__('Stamp Cost'),
    //'index'     => 'Im not sure this is necessary',
    'type'      => 'price',
    'currency_code' => $store->getBaseCurrency()->getCode(),
    'renderer' => new Company_Module_Block_Adminhtml_Renderer_CostSum() 
));
 
 希望有所帮助！ 

Essentially, there are two ways to do it. Add the field to the collection and get the data from the database, or calculate it in PHP based on the 3 values returned from the DB. Doing the first way with the Magento Collection would, in my opinion, be too complex. instead, you want to use a Renderer (Mage_Adminhtml_Block_Widget_Grid_Column_Renderer_Abstract)
 
First, inside of the Block/Adminhtml folder of your plugin, make a new folder called Renderer. Inside of it make a new file called CostSum.php with the following contents:
 
<?php 
class Company_Module_Block_Adminhtml_Renderer_CostSum extends Mage_Adminhtml_Block_Widget_Grid_Column_Renderer_Abstract
{
    public function render(Varien_Object $row)
    {
         return $row->getStampCost() + $row->getInkCost() + $row->getFormCost();
    }
}
 
Then, in the grid, make a new column 
 
$this->addColumn('cost_total', array(
    'header'    => Mage::helper('imprint')->__('Stamp Cost'),
    //'index'     => 'Im not sure this is necessary',
    'type'      => 'price',
    'currency_code' => $store->getBaseCurrency()->getCode(),
    'renderer' => new Company_Module_Block_Adminhtml_Renderer_CostSum() 
));
 
Hope that helps!