我正在尝试使用这个简单的方法为GraphAware Neo4j PHP OGM library在Neo4j数据库中为我的关系构建一个实体对象:
public function getRelationshipEntity($entityId) {
$repo = $this->entityManager->getRepository( Entity\Relationship\Fired::class );
return $repo->findOneById($entityId);
}
这里我们有实体类,关系优先:
namespace Entity\Relationship;
use GraphAware\Neo4j\OGM\Annotations as OGM;
use Entity\Issue;
use Entity\Event;
/**
* @OGM\RelationshipEntity(type="FIRED")
*/
class Fired {
/**
* @OGM\GraphId()
*/
protected $id;
/**
* @OGM\StartNode(targetEntity="Entity\Event")
*/
protected $event;
/**
* @OGM\EndNode(targetEntity="Entity\Issue")
*/
protected $issue;
/**
* @var string
*
* @OGM\Property(type="string")
*/
protected $time;
/**
* @var string
*
* @OGM\Property(type="string")
*/
protected $eventName;
}
然后,启动节点:
namespace Entity;
use GraphAware\Neo4j\OGM\Annotations as OGM;
/**
* @OGM\Node(label="Event")
*/
class Event {
/**
* @OGM\GraphId()
*/
protected $id;
/**
* @var string
*
* @OGM\Property(type="string")
*/
protected $name;
}
..和结束节点:
namespace Entity;
use Doctrine\Common\Collections\ArrayCollection;
use GraphAware\Neo4j\OGM\Annotations as OGM;
/**
* @OGM\Node(label="Issue")
*/
class Issue {
/**
* @OGM\GraphId()
*/
protected $id;
/**
* @OGM\Property(type="string")
*/
protected $key;
/**
* @OGM\Property(type="string")
*/
protected $created;
/**
* @OGM\Property(type="string")
*/
protected $updated;
/**
* @OGM\Relationship(type="FIRED", direction="INCOMING", relationshipEntity="Entity\Relationship\Fired", collection=true)
* @var ArrayCollection
*/
protected $eventFires;
public function __construct($key) {
$this->key = $key;
$this->eventFires = new ArrayCollection();
}
public function __wakeup() {
$this->__construct($this->key);
}
/**
* @return ArrayCollection
*/
public function getEventFires() {
return $this->eventFires;
}
public function addEventFire(Entity\Relationship\Fired $eventFired) {
$this->eventFires->add($eventFired);
}
public function removeEventFire(Entity\Relationship\Fired $eventFired) {
$this->eventFires->removeElement($eventFired);
}
}
显然,对于节点entites来说效果非常好,会触发以下关系错误:
致命错误:在/vendor/graphaware/neo4j-php-ogm/src/EntityManager.php中调用未定义的方法GraphAware \ Neo4j \ OGM \ Metadata \ RelationshipEntityMetadata :: hasCustomRepository()
有什么建议我可以解决这个问题吗?我甚至尝试使用以下方式EntityManager::createQuery()
:
public function getRelationships($eventName) {
$query = $this->entityManager->createQuery('MATCH (e:Event)-[f:FIRED{eventName: {eventName}}]->() RETURN e,f ORDER BY f.time');
$query->addEntityMapping('e', 'Entity\Event' );
$query->addEntityMapping('f', 'Entity\Relationship\Fired' );
$query->setParameter( 'eventName', $eventName);
return $query->execute();
}
但是,显然,addEntityMapping()
对关系实体也不起作用! (它可能是一个功能,而不是一个错误):
捕获致命错误:参数1传递给GraphAware \ Neo4j \ OGM \ Hydrator \ EntityHydrator :: hydrateNode()必须实现接口GraphAware \ Common \ Type \ Node,GraphAware \ Bolt \ Result \ Type \ Relationship的实例,调用在第145行的/vendor/graphaware/neo4j-php-ogm/src/Query.php中,在第232行的/vendor/graphaware/neo4j-php-ogm/src/Hydrator/EntityHydrator.php中定义
所以,我最终得知我可以使用这个库在Neo4J中轻松定义和存储关系实体,但不知道如何使用EntityManager轻松检索它,就像我可以用节点一样。
非常感谢任何帮助!
根据以下评论中的要求,这些是我正在使用的GraphAware软件包:
graphaware/neo4j-bolt 1.9.1 Neo4j Bolt Binary Protocol PHP Driver
graphaware/neo4j-common 3.4.0 Common Utilities library for Neo4j
graphaware/neo4j-php-client 4.8.0 Neo4j-PHP-Client is the most advanced PHP Client for Neo4j
graphaware/neo4j-php-ogm 1.0.0-RC6 PHP Object Graph Mapper for Neo4j