Utilisation de createNativeQuery pour joindre deux entités sans clé étrangère

Question

Je souhaite récupérer des données de deux tables différentes en fonction de la valeur d'un champ (type). Fondamentalement, si le type est 2 ou 3, se rapportent 'subcategory_id' à category2 ou catégorie3 respectivement

Le SQL simple:

SELECT s.id, s.subcategory_id, s.type, IF(s.type = 2, c2.name, c3.name) as name 
            FROM show_subcategory s 
            LEFT JOIN category2 c2 ON (s.type = 2 AND s.subcategory_id = c2.id) 
            LEFT JOIN category3 c3 ON (s.type = 3 AND s.subcategory_id = c3.id) 
            WHERE s.category1_id = 1 ORDER BY s.order_list 

La traduction dql en classe Repository:

$em = $this->getEntityManager(); 
    $rsm = new ResultSetMapping; 
    $rsm->addEntityResult('Acme\CoreBundle\Entity\ShowSubcategory', 's'); 
    $rsm->addFieldResult('s', 'id', 'id'); 
    $rsm->addFieldResult('s', 'subcategory_id', 'subcategoryId'); 
    $rsm->addFieldResult('s', 'type', 'type'); 
    $rsm->addFieldResult('s', 'order_list', 'orderList'); 

    $rsm->addJoinedEntityResult('Acme\CoreBundle\Entity\Category2' , 'c2', 's', 'category2'); 
    $rsm->addFieldResult('c2', 'id', 'id'); 
    $rsm->addFieldResult('c2', 'name', 'name'); 

    $rsm->addJoinedEntityResult('Acme\CoreBundle\Entity\Category3' , 'c3', 's', 'category3'); 
    $rsm->addFieldResult('c3', 'id', 'id'); 
    $rsm->addFieldResult('c3', 'name', 'name'); 

    $q = $em->createNativeQuery("SELECT s.id, s.subcategory_id, s.type, IF(s.type = 2, c2.name, c3.name) as name 
            FROM show_subcategory s 
            LEFT JOIN category2 c2 ON (s.type = 2 AND s.subcategory_id = c2.id) 
            LEFT JOIN category3 c3 ON (s.type = 3 AND s.subcategory_id = c3.id) 
            WHERE s.category1_id = ? ORDER BY s.order_list", $rsm); 
    $q->setParameter(1, $category1); 

    return $q->getResult(); 

Dans l'entité pour ShowSubcategory j'ai ajouté deux nouvelles propriétés à gérer avec cette requête (category2, category3):

/** 
* @var integer $id 
* 
* @ORM\Column(name="id", type="integer", nullable=false) 
* @ORM\Id 
* @ORM\GeneratedValue(strategy="AUTO") 
*/ 
protected $id; 

/** 
* @var integer $subcategoryId 
* 
* @ORM\Column(name="subcategory_id", type="integer", nullable=false) 
*/ 
protected $subcategoryId; 

/** 
* @var smallint $type 
* 
* @ORM\Column(name="type", type="smallint", nullable=false) 
*/ 
protected $type; 

/** 
* @var smallint $orderList 
* 
* @ORM\Column(name="order_list", type="smallint", nullable=true) 
*/ 
protected $orderList; 

/** 
* @var \Category1 
* 
* @ORM\ManyToOne(targetEntity="Acme\CoreBundle\Entity\Category1") 
* @ORM\JoinColumns({ 
* @ORM\JoinColumn(name="category1_id", referencedColumnName="id") 
* }) 
*/ 
protected $category1; 

/** 
* @var category2 
* 
* @ORM\ManyToOne(targetEntity="Acme\CoreBundle\Entity\Category2") 
* @ORM\JoinColumns({ 
* @ORM\JoinColumn(name="subcategory_id", referencedColumnName="id") 
* }) 
* @Assert\Blank() 
*/ 
protected $category2; 

/** 
* @var category3 
* 
* @ORM\ManyToOne(targetEntity="Acme\CoreBundle\Entity\Category3") 
* @ORM\JoinColumns({ 
* @ORM\JoinColumn(name="subcategory_id", referencedColumnName="id") 
* }) 
* @Assert\Blank() 
*/ 
protected $category3; 


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


/** 
* Set category1 
* 
* @param \Acme\CoreBundle\Entity\Category1 $category1 
* @return ShowSubcategory 
*/ 
public function setCategory1(\Acme\CoreBundle\Entity\Category1 $category1 = null) 
{ 
    $this->category1 = $category1; 

    return $this; 
} 

/** 
* Get category1 
* 
* @return Acme\CoreBundle\Entity\Category1 
*/ 
public function getCategory1() 
{ 
    return $this->category1; 
} 

/** 
* Set subcategoryId 
* 
* @param integer $subcategoryId 
* @return ShowSubcategory 
*/ 
public function setSubcategoryId($subcategoryId) 
{ 
    $this->subcategoryId = $subcategoryId; 

    return $this; 
} 

/** 
* Get subcategoryId 
* 
* @return integer 
*/ 
public function getSubcategoryId() 
{ 
    return $this->subcategoryId; 
} 

/** 
* Set type 
* 
* @param smallint $type 
* @return ShowSubcategory 
*/ 
public function setType($type) 
{ 
    $this->type = $type; 

    return $this; 
} 

/** 
* Get type 
* 
* @return smallint 
*/ 
public function getType() 
{ 
    return $this->type; 
} 

/** 
* Set order 
* 
* @param smallint $OrderList 
* @return ShowSubcategory 
*/ 
public function setOrderList($orderList) 
{ 
    $this->orderList = $orderList; 

    return $this; 
} 

/** 
* Get OrderList 
* 
* @return smallint 
*/ 
public function getOrderList() 
{ 
    return $this->orderList; 
} 

public function getCategory2() 
{ 
    return $this->category2; 
} 

public function setCategory2(Category2 $category2 = null) 
{ 
    $this->category2 = $category2; 
    return $this; 
} 

public function getCategory3() 
{ 
    return $this->category3; 
} 

public function setCategory3(Category3 $category3 = null) 
{ 
    $this->category3 = $category3; 
    return $this; 
} 

}

Je reçois cette erreur:

Notice: Undefined index: id in /var/www/project/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php line 2402 

Je ne sais pas quel est le problème, je l'ai essayé plusieurs idées, mais rien ne semble fonctionner. Toute suggestion?. Merci d'avance.

Answer 1

Je suppose que vous devez ajouter dans la id explicitement clause SELECT:

SELECT s.id, s.subcategory_id, s.type, IF(s.type = 2, c2.name, c3.name) as name, c2.id as c2id, c3.id as c3id 
    FROM show_subcategory s 
    LEFT JOIN category2 c2 ON (s.type = 2 AND s.subcategory_id = c2.id) 
    LEFT JOIN category3 c3 ON (s.type = 3 AND s.subcategory_id = c3.id) 
    WHERE s.category1_id = ? ORDER BY s.order_list 

et adapter les ResultSet comme suit:

$rsm = new ResultSetMapping; 
$rsm->addEntityResult('Acme\CoreBundle\Entity\ShowSubcategory', 's'); 
$rsm->addFieldResult('s', 'id', 'id'); 
$rsm->addFieldResult('s', 'subcategory_id', 'subcategoryId'); 
$rsm->addFieldResult('s', 'type', 'type'); 
$rsm->addFieldResult('s', 'order_list', 'orderList'); 

$rsm->addJoinedEntityResult('Acme\CoreBundle\Entity\Category2' , 'c2', 's', 'category2'); 
$rsm->addFieldResult('c2', 'c2id', 'id'); 
$rsm->addFieldResult('c2', 'name', 'name'); 

$rsm->addJoinedEntityResult('Acme\CoreBundle\Entity\Category3' , 'c3', 's', 'category3'); 
$rsm->addFieldResult('c3', 'c3id', 'id'); 
$rsm->addFieldResult('c3', 'name', 'name');