Symfony 3: ResultSetMapping Mapping Ausnahmefehler erzeugen

Question

I eine Bestandssystem bin zu schaffen. Und ich wollte mit ResultSetMapping das Guthaben eines Artikels im Bestand anzeigen. Ich folge dem Beispiel bei http://doctrine-orm.readthedocs.io/en/latest/reference/native-sql.html#examples gezeigt Aber ich habe einen Fehler „Class 'RequestItem' existiert nicht - 500 Internal Server Error - MappingException„

namespace ECA\InventoryBundle\Controller; 

use Symfony\Component\HttpFoundation\Request; 
use Symfony\Bundle\FrameworkBundle\Controller\Controller; 
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Method; 
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route; 
use ECA\InventoryBundle\Entity\RequestItem; 
use ECA\InventoryBundle\Form\RequestItemType; 

use Symfony\Component\Form\Extension\Core\Type\TextType; 

use Doctrine\ORM\Query\ResultSetMapping; 

/** 
* RequestItem controller. 
* 
* @Route("/requestitem") 
*/ 
class RequestItemController extends Controller 
{ 
    /** 
    * Calculate and display balance 
    * 
    *@Route("/balance", name="requestitem_balance") 
    *@Method("GET") 
    */ 
    public function balanceAction() 
    { 

     $rsm = new ResultSetMapping; 
     $rsm->addEntityResult('RequestItem', 'r'); 
     $rsm->addFieldResult('r','item_id', 'id'); 
     $rsm->addScalarResult('SUM(r.quantity)', 'used'); 
     $rsm->addJoinedEntityResult('Item' , 'i', 'r','item'); 
     $rsm->addFieldResult('i', 'name','name'); 
     $rsm->addFieldResult('i', 'quantity','quantity'); 
     $rsm->addScalarResult('(i.quantity - SUM(r.quantity))', 'balance'); 

     $sql = "SELECT i.name, r.item_id, i.quantity, SUM(r.quantity) AS used, 
     (i.quantity - SUM(r.quantity)) AS balance 
     FROM request_item r INNER JOIN item i ON i.id=r.item_id GROUP BY r.item_id"; 


     $em = $this->getDoctrine()->getManager(); 

     $query = $em->createNativeQuery($sql, $rsm); 

     $itemBalance = $query->getResult(); 

     $form = $this->createFormBuilder($itemBalance) 
     ->add('item_id', TextType::class, array('attr' =>array('class' =>'form-control', 'style' =>'margin-bottom:15px'))) 
     ->add('name', TextType::class, array('attr' =>array('class' =>'form-control', 'style' =>'margin-bottom:15px'))) 
     ->add('quantity', TextType::class, array('attr' =>array('class' =>'form-control', 'style' =>'margin-bottom:15px'))) 
     ->add('used', TextType::class, array('attr' =>array('class' =>'form-control', 'style' =>'margin-bottom:15px'))) 
     ->add('balance', TextType::class, array('attr' =>array('class' =>'form-control', 'style' =>'margin-bottom:15px'))) 
     ->getForm(); 

     return $this->render('requestitem/balance.html.twig', array('itemBalance'=> $itemBalance, 'form' => $form->createView())); 

    } 

Aber die Klasse RequestItem existiert

namespace ECA\InventoryBundle\Entity; 

use Doctrine\ORM\Mapping as ORM; 

/** 
* RequestItem 
* 
* @ORM\Table(name="request_item") 
* @ORM\Entity(repositoryClass="ECA\InventoryBundle\Repository\RequestItemRepository") 
*/ 
class RequestItem 
{ 
    /** 
    * @var int 
    * 
    * @ORM\Column(name="id", type="integer") 
    * @ORM\Id 
    * @ORM\GeneratedValue(strategy="AUTO") 
    */ 
    private $id; 

    /** 
    * @var \DateTime 
    * 
    * @ORM\Column(name="date", type="date") 
    */ 
    private $date; 

    /** 
    * @var int 
    * 
    * @ORM\Column(name="quantity", type="integer") 
    */ 
    private $quantity; 

    /** 
    * @var string 
    * 
    * @ORM\Column(name="client", type="string", length=255) 
    */ 
    private $client; 

    /** 
    * @var string 
    * 
    * @ORM\Column(name="remark", type="text", nullable=true) 
    */ 
    private $remark; 

    /** 
    * @var \ECA\InventoryBundle\Entity\Item 
    * 
    * @ORM\ManyToOne(targetEntity="ECA\InventoryBundle\Entity\Item") 
    * @ORM\JoinColumns({ 
    * @ORM\JoinColumn(name="item_id", referencedColumnName="id") 
    * }) 
    */ 
    private $item; 


    /** 
    * Get id 
    * 
    * @return int 
    */ 
    public function getId() 
    { 
     return $this->id; 
    } 

    /** 
    * Set date 
    * 
    * @param \DateTime $date 
    * 
    * @return RequestItem 
    */ 
    public function setDate($date) 
    { 
     $this->date = $date; 

     return $this; 
    } 

    /** 
    * Get date 
    * 
    * @return \DateTime 
    */ 
    public function getDate() 
    { 
     return $this->date; 
    } 

    /** 
    * Set quantity 
    * 
    * @param integer $quantity 
    * 
    * @return RequestItem 
    */ 
    public function setQuantity($quantity) 
    { 
     $this->quantity = $quantity; 

     return $this; 
    } 

    /** 
    * Get quantity 
    * 
    * @return int 
    */ 
    public function getQuantity() 
    { 
     return $this->quantity; 
    } 

    /** 
    * Set client 
    * 
    * @param string $client 
    * 
    * @return RequestItem 
    */ 
    public function setClient($client) 
    { 
     $this->client = $client; 

     return $this; 
    } 

    /** 
    * Get client 
    * 
    * @return string 
    */ 
    public function getClient() 
    { 
     return $this->client; 
    } 

    /** 
    * Set remark 
    * 
    * @param string $remark 
    * 
    * @return RequestItem 
    */ 
    public function setRemark($remark) 
    { 
     $this->remark = $remark; 

     return $this; 
    } 

    /** 
    * Get remark 
    * 
    * @return string 
    */ 
    public function getRemark() 
    { 
     return $this->remark; 
    } 

    /** 
    * Set item 
    * 
    * @param \ECA\InventoryBundle\Entity\Item $item 
    * 
    * @return RequestItem 
    */ 
    public function setItem(\ECA\InventoryBundle\Entity\Item $item = null) 
    { 
     $this->item = $item; 

     return $this; 
    } 

    /** 
    * Get item 
    * 
    * @return \ECA\InventoryBundle\Entity\Item 
    */ 
    public function getItem() 
    { 
     return $this->item; 
    } 
} 

Ich benutze Symfony3 auf XAMPP (PHP7). Ich habe meine Abfrage in Mysql getestet und es funktioniert wie erwartet.

Was mache ich falsch? Irgendeine Idee? Dank

Answer 1

Sie sind Aliasing Sie SUM-Werte, so dass Sie die Alias-Namen verwenden, müssen sie abzubilden.

$rsm->addScalarResult('SUM(r.quantity)', 'used'); 
... 
$rsm->addScalarResult('(i.quantity - SUM(r.quantity))', 'balance'); 

Wechsel zu

$rsm->addScalarResult('used', 'used'); 
... 
$rsm->addScalarResult('balance', 'balance');