Adding ''pseudo-fields'' to xPDOObject

5 Posts

anubite Reply #1, 15 years, 6 months ago

Hi all,

I created model with xPDO. Everything is working fine. But I have got one question:

I’ve got fields ’item_price’ and ’item_price_after_discount’. I want to create pseudo-field called ’item_discount_percent’, which is not in DB, which will return a percentage of discount. And I would like to this field be available through get() and toArray() methods.

It surely must be done by exteding xPDOObject or the Item class. But I don’t know how to extend it.

Thanks for your advice

4,149 Posts

splittingred Reply #2, 15 years, 6 months ago

In your custom class (i’ll call it Item), you need to override the get method. I assume your logic would look something like this:

class Item extends xPDOObject {
 /* ... */

 public function get($k, $format = null, $formatTemplate= null) {
   switch ($k) {
     case 'item_discount_percent':
       $v = ($this->get('item_price_after_discount') / $this->get('item_price')) * 100;
       break;
     default:
       $v = parent::get($k,$format,$formatTemplate);
       break;
   }
   return $v;
 }
}

shaun mccormick | bigcommerce mgr of software engineering, former modx co-architect | github | splittingred.com

5 Posts

anubite Reply #3, 15 years, 6 months ago

Thanks a lot