我有以下教义实体，其中EntityA是拥有方：
<?php
class EntityA
{
/**
* @ORM\ManyToOne(targetEntity="EntityB" , inversedBy="propertyA")
*/
private $propertyB;
// ....
public function setEntityB(EntityB $entBRef)
{
$this->propertyB = $entBRef;
}
}
class EntityB
{
/**
* @ORM\OneToMany(targetEntity="EntityA", mappedBy="propertyB")
*/
private $propertyA;
// ....
}
我也有一个RepositoryB类：
<?php
class RepositoryB extends \Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository
{
public function __construct(\Doctrine\Common\Persistence\ManagerRegistry $registry)
{
parent::__construct($registry, EntityB::class);
}
}
然后在我的课堂上，我试图保留EntityA对象：
<?php
class SomeService
{
/** @var RepositoryB */
private $repositoryB;
/** @var EntityManagerInterface */
private $entityManager;
public function __construct(RepositoryB $repositoryB, EntityManagerInterface $entityManager)
{
$this->repositoryB = $repositoryB;
$this->entityManager = $entityManager;
}
public function testSomething()
{
$entBRef = $this->repositoryB->find(1);
$newEnt = (new EntityA());
$newEnt->setEntityB($entBRef);
$this->entityManager->persist($newEnt);
$this->flush();
}
}
但是我遇到以下错误：
通过关系'EntityA＃propertyB找到了一个新实体没有配置为级联实体的持久化操作：实体B。解决此问题的方法：显式调用此未知实体上的EntityManager＃persist（）或配置级联
这是我的doctrine.yaml文件的外观：
parameters:
env(DATABASE_URL_WRITE): ''
services:
gedmo.listener.timestampable:
class: Org\CompBundle\Gedmo\Timestampable\TimestampableListener
tags:
- { name: doctrine.event_subscriber, connection: default }
calls:
- [ setAnnotationReader, [ "@annotation_reader" ] ]
gedmo.listener.loggable:
class: Gedmo\Loggable\LoggableListener
tags:
- { name: doctrine.event_subscriber, connection: default }
calls:
- [ setAnnotationReader, [ "@annotation_reader" ] ]
gedmo.listener.deleteable:
class: Gedmo\SoftDeleteable\SoftDeleteableListener
tags:
- { name: doctrine.event_subscriber, connection: default }
calls:
- [ setAnnotationReader, [ '@annotation_reader' ] ]
doctrine:
dbal:
default_connection: default
types:
microseconds: Org\CompBundle\DBAL\Types\DateTimeMicrosecondsType
connections:
read_only:
url: '%env(resolve:DATABASE_URL_READ)%'
driver: 'pdo_mysql'
server_version: '5.7'
charset: utf8mb4
default_table_options:
charset: utf8mb4
collate: utf8mb4_unicode_ci
default:
url: '%env(resolve:DATABASE_URL_WRITE)%'
driver: 'pdo_mysql'
server_version: '5.7'
charset: utf8mb4
default_table_options:
charset: utf8mb4
collate: utf8mb4_unicode_ci
orm:
auto_generate_proxy_classes: '%kernel.debug%'
default_entity_manager: default
entity_managers:
filters:
filters:
softdeleteable:
class: Gedmo\SoftDeleteable\Filter\SoftDeleteableFilter
enabled: true
read_only:
connection: read_only
naming_strategy: doctrine.orm.naming_strategy.underscore_number_aware
mappings:
gedmo_loggable:
type: annotation
prefix: Gedmo\Loggable\Entity
dir: "%kernel.root_dir%/../vendor/gedmo/doctrine-extensions/lib/Gedmo/Loggable/Entity"
alias: GedmoLoggable
is_bundle: false
App:
is_bundle: false
type: annotation
dir: '%kernel.project_dir%/vendor/org/comp-bundle/Entity'
prefix: 'Org\CompBundle\Entity'
alias: Drm
dql:
datetime_functions:
timetosec: DoctrineExtensions\Query\Mysql\TimeToSec
timediff: DoctrineExtensions\Query\Mysql\TimeDiff
now: DoctrineExtensions\Query\Mysql\Now
numeric_functions:
rand: DoctrineExtensions\Query\Mysql\Rand
default:
connection: default
filters:
softdeleteable:
class: Gedmo\SoftDeleteable\Filter\SoftDeleteableFilter
enabled: true
naming_strategy: doctrine.orm.naming_strategy.underscore_number_aware
auto_mapping: true
mappings:
gedmo_loggable:
type: annotation
prefix: Gedmo\Loggable\Entity
dir: "%kernel.root_dir%/../vendor/gedmo/doctrine-extensions/lib/Gedmo/Loggable/Entity"
alias: GedmoLoggable
App:
is_bundle: false
type: annotation
dir: '%kernel.project_dir%/vendor/org/comp-bundle/Entity'
prefix: 'Org\CompBundle\Entity'
alias: Drm
dql:
datetime_functions:
timetosec: DoctrineExtensions\Query\Mysql\TimeToSec
timediff: DoctrineExtensions\Query\Mysql\TimeDiff
now: DoctrineExtensions\Query\Mysql\Now
numeric_functions:
rand: DoctrineExtensions\Query\Mysql\Rand
最后但并非最不重要的一点是，我在org\compbundle\Resources\services.yaml进行了以下设置：
services:
_defaults:
autowire: true
autoconfigure: true
public: false
bind:
$logger: '@Psr\Log\LoggerInterface'
Org\CompBundle\Repository\:
resource: '../../Repository/{Case,Main}'
exclude: ['../../Repository/**/*Interface.php']
tags: ['doctrine.repository_service']
Org\CompBundle\Interfaces\Queues\QueueRepositoryInterface:
class: Org\CompBundle\Repository\DrmCase\QueueRepository
Org\CompBundle\Interfaces\Cases\CasesRepositoryInterface:
class: Org\CompBundle\Repository\DrmCase\CasesRepository
Doctrine\Common\Persistence\ManagerRegistry: '@doctrine'
到目前为止我做了什么？
cascade={"persist"}，我必须说这没有用。我确实发现了this很有帮助，但是我一直在问自己为什么Doctrine会仅仅因为引用而试图插入并存在实体？有什么办法可以使它正常工作？
我不希望EntityB保持不变或更新，它已经存在。我确实希望新的EntityA对EntityB中的现有记录具有FK。
[在周末期间，一位工作同事非常努力地找出导致问题的原因，并在大量小时调试了Doctrine和UoW的工作方式后，他发现了问题所在：Doctrine和存储库模式如何工作。让我解释一下。
如果仔细检查并深入研究Doctrine，您将注意到以下代码如何导致两个不同的实体管理器：
public function __construct(RepositoryB $repositoryB, EntityManagerInterface $entityManager)
{
$this->repositoryB = $repositoryB; // spin his own EM
$this->entityManager = $entityManager; // this is a new EM object
}
所以：
$entBRef = $this->repositoryB->find(1);
正在通过另一个EM获取，并且由于我使用$this->entityManager来持久化/刷新最近创建的entityA对象，因此Doctrine将$entBRef视为必须持久化的新实体。
我们的解决方案是通过我不太喜欢的同一存储库类来获取所有内容，因为我们正在查询不属于该存储库的事物，因此必须使用同一EM进行持久化/刷新。
如果您有其他解决方案，那就太好了。