Как сделать сортировку товара в My_Shop_Controller_Show

->clearOrderBy()
->orderBy('shop_items.datetime', ''DESC');

->orderBy('shop_items.id', 'DESC');

class My_Shop_Controller_Show extends Shop_Controller_Show
{
    protected function _groupCondition()
    {
       $oShop = $this->getEntity();
    
       if ($this->group)
       {
          // если ID группы не 0, т.е. не корневая группа
          // получаем подгруппы
          $aSubGroupsID = $this->fillShopGroup($oShop->id, $this->group); // добавляем текущую группу в массив
          $aSubGroupsID[] = $this->group;

          $this->shopItems()
             ->queryBuilder()
             ->where('shop_items.shop_group_id', 'IN', $aSubGroupsID) // получаем все товары из подгрупп
                 ->clearOrderBy()
                   ->orderBy('shop_items.id', 'DESC');
       }
       else
       {
          $this->shopItems()
             ->queryBuilder()
             ->where('shop_items.shop_group_id', '=', 0)
                   ->clearOrderBy()
                     ->orderBy('shop_items.id', 'DESC');
       }

       return $this;
    }

    protected $_aGroupTree = array();

    public function fillShopGroup($iShopId, $iShopGroupParentId = 0, $iLevel = 0)
    {
       $iShopId = intval($iShopId);
       $iShopGroupParentId = intval($iShopGroupParentId);
       $iLevel = intval($iLevel);

       if ($iLevel == 0)
       {
          $aTmp = Core_QueryBuilder::select('id', 'parent_id')
             ->from('shop_groups')
             ->where('shop_id', '=', $iShopId)
             ->where('deleted', '=', 0)
             ->execute()->asAssoc()->result();

          foreach ($aTmp as $aGroup)
          {
             $this->_aGroupTree[$aGroup['parent_id']][] = $aGroup;
          }
       }

       $aReturn = array();

       if (isset($this->_aGroupTree[$iShopGroupParentId]))
       {
          foreach ($this->_aGroupTree[$iShopGroupParentId] as $childrenGroup)
          {
             $aReturn[] = $childrenGroup['id'];
             $aReturn = array_merge($aReturn, $this->fillShopGroup($iShopId, $childrenGroup['id'], $iLevel + 1));
          }
       }

       $iLevel == 0 && $this->_aGroupTree = array();

       return $aReturn;
    }
}

$oShop = Core_Entity::factory('Shop', Core_Array::get(Core_Page::instance()->libParams, 'shopId'));

$Shop_Controller_Show = new My_Shop_Controller_Show($oShop);

->orderBy('shop_items.datetime', 'DESC');

   /**
    * Set item's conditions
    * @return self
    */
   protected function _setShopItems()
   {
      parent::_setShopItems();
      
      $this->_Shop_Items
         ->queryBuilder()
         ->clearOrderBy()
         ->orderBy('shop_items.datetime', 'DESC');

      return $this;
   }

class My_Shop_Controller_Show extends Shop_Controller_Show
{
// ...
}