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我正在尝试使用以下简单方法使用GraphAware Neo4j PHP OGM 库为我在 Neo4j 数据库中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,对节点实体非常有效的方法会触发以下关系错误:

致命错误:调用 /vendor/graphaware/neo4j-php-ogm/src/EntityManager.php 中未定义的方法 GraphAware\Neo4j\OGM\Metadata\RelationshipEntityMetadata::hasCustomRepository()

有什么建议我可以解决这个问题吗?我什至尝试使用EntityManager::createQuery()以下方式:

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()也不适用于关系实体!(虽然它可能是一个功能,而不是一个错误):

可捕获的致命错误:传递给 GraphAware\Neo4j\OGM\Hydrator\EntityHydrator::hydraNode() 的参数 1 必须实现接口 GraphAware\Common\Type\Node,给出 GraphAware\Bolt\Result\Type\Relationship 的实例,在 /vendor 中调用/graphaware/neo4j-php-ogm/src/Query.php 在第 145 行,并在第 232 行的 /vendor/graphaware/neo4j-php-ogm/src/Hydrator/EntityHydrator.php 中定义

因此,我最终可以使用这个库在 Neo4J 中轻松定义和存储关系实体,但不确定如何使用 EntityManager 轻松检索它,就像我可以使用节点一样。

任何帮助将非常感激!

正如下面评论中的要求,这些是我正在使用的 GraphAware 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
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