/**
  * 
  * @return \Application\Model\Collection\PurchaseOrderLogCollection
  */
 public function getPurchaseOrderLogCollection()
 {
     if (!$this->purchaseOrderLogCollection instanceof PurchaseOrderLogCollection) {
         $this->purchaseOrderLogCollection = PurchaseOrderLogQuery::create()->whereAdd(PurchaseOrderLog::ID_PURCHASE_ORDER, $this->getPurchaseOrderCollection()->getPrimaryKeys())->find();
     }
     return $this->purchaseOrderLogCollection;
 }
 /**
  *
  */
 protected function trackingAction()
 {
     $id = $this->getRequest()->getParam('id');
     $purchaseOrder = PurchaseOrderQuery::create()->findByPKOrThrow($id, $this->i18n->_("It does not exist the PurchaseOrder with id {$id}"));
     $this->view->purchaseOrderLogs = PurchaseOrderLogQuery::create()->whereAdd('id_purchase_order', $id)->find();
     $this->view->users = UserQuery::create()->find()->toCombo();
 }