slug-列'slug‘不能为空

Question

我正在使用Doctrine，通过StofDoctrineExtensionsBundle与DoctrineExtensions一起使用"Doctrine扩展迟滞“行为自动生成插件。

监听程序似乎已正确注册。实体字段也被标记为可延迟的。

当尝试通过Symfony表单持久化我的实体时，不会发生插件生成。正在引发数据库异常。

例外：

An exception occurred while executing 'INSERT INTO event (startDate, endDate, title, slug, description, image, followers, city, place) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)' with params ["2017-06-24 20:00:00", "2017-06-26 12:00:00", "Test event name for slug generation", null, "Test", null, null, "Somewhere", "Somewhere else"]:

SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'slug' cannot be null

版本：

PHP                                  7.0.15
symfony/symfony                      v3.2.9
doctrine/doctrine-bundle             1.6.8
doctrine/orm                         v2.5.6
gedmo/doctrine-extensions            v2.4.29
stof/doctrine-extensions-bundle      v1.2.2 

config.yml

doctrine:
    dbal:
        driver: pdo_mysql
        host: '%database_host%'
        port: '%database_port%'
        dbname: '%database_name%'
        user: '%database_user%'
        password: '%database_password%'
        charset: UTF8
    orm:
        auto_generate_proxy_classes: '%kernel.debug%'
        naming_strategy: doctrine.orm.naming_strategy.underscore
        auto_mapping: true

stof_doctrine_extensions:
    default_locale: '%locale%' # pl
    translation_fallback: true
    orm:
        default:
            sluggable: true

实体(Event.orm.xml)

<?xml version="1.0" encoding="utf-8"?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd"
                  xmlns:gedmo="http://Atlantic18.github.io/DoctrineExtensions/schemas/orm/doctrine-extensions-3.0.xsd">
    <entity repository-class="AppBundle\Repository\EventRepository" name="AppBundle\Entity\Event">
        <id name="id" type="integer" column="id">
            <generator strategy="AUTO"/>
        </id>
        <field name="startDate" type="datetime" column="startDate"/>
        <field name="endDate" type="datetime" column="endDate"/>
        <field name="title" type="string" column="title" length="255"/>
        <field name="slug" type="string" column="slug" length="255" unique="true">
            <gedmo:slug unique="true" updatable="true" fields="title" separator="-" />
        </field>
        <field name="description" type="text" column="description" nullable="true"/>
        <field name="image" type="string" column="image" length="255" nullable="true"/>
        <field name="followers" type="integer" column="followers" nullable="true"/>
        <field name="city" type="string" column="city" nullable="false" />
        <field name="place" type="string" column="place" nullable="true" />
    </entity>
</doctrine-mapping>

控制器操作：

    public function createAction(Request $request)
    {
        $form = $this->createForm(EventType::class);

        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            /** @var Event $event */
            $event = $form->getData();

            $em = $this->getDoctrine()->getManager();
            $em->persist($event);
            $em->flush();

            $this->addFlash('success', 'event created');
            return $this->redirectToRoute('calendar_event', [
                'slug' => $event->getSlug()
            ]);
        }

        return ['form' => $form->createView()];
    }

完整堆栈跟踪：

[1] Doctrine\DBAL\Exception\NotNullConstraintViolationException: An exception occurred while executing 'INSERT INTO event (startDate, endDate, title, slug, description, image, followers, city, place) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)' with params ["2017-06-24 20:00:00", "2017-06-26 12:00:00", "Test event name for slug generation", null, "Test", null, null, "Somewhere", "Somewhere else"]:

SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'slug' cannot be null
    at n/a
        in /project_home/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/AbstractMySQLDriver.php line 112

    at Doctrine\DBAL\Driver\AbstractMySQLDriver->convertException('An exception occurred while executing \'INSERT INTO event (startDate, endDate, title, slug, description, image, followers, city, place) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)\' with params ["2017-06-24 20:00:00", "2017-06-26 12:00:00", "Test event name for slug generation", null, "Test", null, null, "Somewhere", "Somewhere else"]:SQLSTATE[23000]: Integrity constraint violation: 1048 Column \'slug\' cannot be null', object(PDOException))
        in /project_home/vendor/doctrine/dbal/lib/Doctrine/DBAL/DBALException.php line 128

    at Doctrine\DBAL\DBALException::driverExceptionDuringQuery(object(Driver), object(PDOException), 'INSERT INTO event (startDate, endDate, title, slug, description, image, followers, city, place) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)', array('2017-06-24 20:00:00', '2017-06-26 12:00:00', 'Test event name for slug generation', null, 'Test', null, null, 'Somewhere', 'Somewhere else'))
        in /project_home/vendor/doctrine/dbal/lib/Doctrine/DBAL/Statement.php line 177

    at Doctrine\DBAL\Statement->execute()
        in /project_home/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php line 281

    at Doctrine\ORM\Persisters\Entity\BasicEntityPersister->executeInserts()
        in /project_home/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php line 1014

    at Doctrine\ORM\UnitOfWork->executeInserts(object(ClassMetadata))
        in /project_home/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php line 378

    at Doctrine\ORM\UnitOfWork->commit(null)
        in /project_home/vendor/doctrine/orm/lib/Doctrine/ORM/EntityManager.php line 356

    at Doctrine\ORM\EntityManager->flush(null)
        in /project_home/var/cache/dev/appDevDebugProjectContainer.php line 7072

    at DoctrineORMEntityManager_00000000751279ee000000007e7efeea3473a0393d6fcd1415b2fc588e376308->flush(null)
        in /project_home/var/cache/dev/jms_diextra/doctrine/EntityManager_59394e2cc7d86.php line 313

    at EntityManager59394e2cc7d86_546a8d27f194334ee012bfe64f629947b07e4919\__CG__\Doctrine\ORM\EntityManager->flush()
        in /project_home/src/AppBundle/Controller/CalendarController.php line 56

    at AppBundle\Controller\CalendarController->createAction(object(Request))
        in  line 

    at ReflectionMethod->invokeArgs(object(CalendarController), array(object(Request)))
        in /project_home/vendor/jms/cg/src/CG/Proxy/MethodInvocation.php line 84

    at CG\Proxy\MethodInvocation->proceed()
        in /project_home/vendor/jms/security-extra-bundle/Security/Authorization/Interception/MethodSecurityInterceptor.php line 133

    at JMS\SecurityExtraBundle\Security\Authorization\Interception\MethodSecurityInterceptor->intercept(object(MethodInvocation))
        in /project_home/vendor/jms/cg/src/CG/Proxy/MethodInvocation.php line 79

    at CG\Proxy\MethodInvocation->proceed()
        in /project_home/var/cache/dev/jms_diextra/proxies/AppBundle-Controller-CalendarController.php line 21

    at EnhancedProxye0ff800f_2852d4e43776e45f00f38751350397dbf530e575\__CG__\AppBundle\Controller\CalendarController->createAction(object(Request))
        in  line 

    at call_user_func_array(array(object(CalendarController), 'createAction'), array(object(Request)))
        in /project_home/var/cache/dev/classes.php line 4228

    at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request), 1)
        in /project_home/var/cache/dev/classes.php line 4183

    at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), 1, true)
        in /project_home/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php line 168

    at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
        in /project_home/web/app_dev.php line 28

    at require('/project_home/web/app_dev.php')
        in /project_home/vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Resources/config/router_dev.php line 40

[2] Doctrine\DBAL\Driver\PDOException: SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'slug' cannot be null
    at n/a
        in /project_home/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php line 93

    at Doctrine\DBAL\Driver\PDOStatement->execute(null)
        in /project_home/vendor/doctrine/dbal/lib/Doctrine/DBAL/Statement.php line 168

    at Doctrine\DBAL\Statement->execute()
        in /project_home/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php line 281

    at Doctrine\ORM\Persisters\Entity\BasicEntityPersister->executeInserts()
        in /project_home/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php line 1014

    at Doctrine\ORM\UnitOfWork->executeInserts(object(ClassMetadata))
        in /project_home/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php line 378

    at Doctrine\ORM\UnitOfWork->commit(null)
        in /project_home/vendor/doctrine/orm/lib/Doctrine/ORM/EntityManager.php line 356

    at Doctrine\ORM\EntityManager->flush(null)
        in /project_home/var/cache/dev/appDevDebugProjectContainer.php line 7072

    at DoctrineORMEntityManager_00000000751279ee000000007e7efeea3473a0393d6fcd1415b2fc588e376308->flush(null)
        in /project_home/var/cache/dev/jms_diextra/doctrine/EntityManager_59394e2cc7d86.php line 313

    at EntityManager59394e2cc7d86_546a8d27f194334ee012bfe64f629947b07e4919\__CG__\Doctrine\ORM\EntityManager->flush()
        in /project_home/src/AppBundle/Controller/CalendarController.php line 56

    at AppBundle\Controller\CalendarController->createAction(object(Request))
        in  line 

    at ReflectionMethod->invokeArgs(object(CalendarController), array(object(Request)))
        in /project_home/vendor/jms/cg/src/CG/Proxy/MethodInvocation.php line 84

    at CG\Proxy\MethodInvocation->proceed()
        in /project_home/vendor/jms/security-extra-bundle/Security/Authorization/Interception/MethodSecurityInterceptor.php line 133

    at JMS\SecurityExtraBundle\Security\Authorization\Interception\MethodSecurityInterceptor->intercept(object(MethodInvocation))
        in /project_home/vendor/jms/cg/src/CG/Proxy/MethodInvocation.php line 79

    at CG\Proxy\MethodInvocation->proceed()
        in /project_home/var/cache/dev/jms_diextra/proxies/AppBundle-Controller-CalendarController.php line 21

    at EnhancedProxye0ff800f_2852d4e43776e45f00f38751350397dbf530e575\__CG__\AppBundle\Controller\CalendarController->createAction(object(Request))
        in  line 

    at call_user_func_array(array(object(CalendarController), 'createAction'), array(object(Request)))
        in /project_home/var/cache/dev/classes.php line 4228

    at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request), 1)
        in /project_home/var/cache/dev/classes.php line 4183

    at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), 1, true)
        in /project_home/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php line 168

    at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
        in /project_home/web/app_dev.php line 28

    at require('/project_home/web/app_dev.php')
        in /project_home/vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Resources/config/router_dev.php line 40

[3] PDOException: SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'slug' cannot be null
    at n/a
        in /project_home/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php line 91

    at PDOStatement->execute(null)
        in /project_home/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php line 91

    at Doctrine\DBAL\Driver\PDOStatement->execute(null)
        in /project_home/vendor/doctrine/dbal/lib/Doctrine/DBAL/Statement.php line 168

    at Doctrine\DBAL\Statement->execute()
        in /project_home/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php line 281

    at Doctrine\ORM\Persisters\Entity\BasicEntityPersister->executeInserts()
        in /project_home/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php line 1014

    at Doctrine\ORM\UnitOfWork->executeInserts(object(ClassMetadata))
        in /project_home/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php line 378

    at Doctrine\ORM\UnitOfWork->commit(null)
        in /project_home/vendor/doctrine/orm/lib/Doctrine/ORM/EntityManager.php line 356

    at Doctrine\ORM\EntityManager->flush(null)
        in /project_home/var/cache/dev/appDevDebugProjectContainer.php line 7072

    at DoctrineORMEntityManager_00000000751279ee000000007e7efeea3473a0393d6fcd1415b2fc588e376308->flush(null)
        in /project_home/var/cache/dev/jms_diextra/doctrine/EntityManager_59394e2cc7d86.php line 313

    at EntityManager59394e2cc7d86_546a8d27f194334ee012bfe64f629947b07e4919\__CG__\Doctrine\ORM\EntityManager->flush()
        in /project_home/src/AppBundle/Controller/CalendarController.php line 56

    at AppBundle\Controller\CalendarController->createAction(object(Request))
        in  line 

    at ReflectionMethod->invokeArgs(object(CalendarController), array(object(Request)))
        in /project_home/vendor/jms/cg/src/CG/Proxy/MethodInvocation.php line 84

    at CG\Proxy\MethodInvocation->proceed()
        in /project_home/vendor/jms/security-extra-bundle/Security/Authorization/Interception/MethodSecurityInterceptor.php line 133

    at JMS\SecurityExtraBundle\Security\Authorization\Interception\MethodSecurityInterceptor->intercept(object(MethodInvocation))
        in /project_home/vendor/jms/cg/src/CG/Proxy/MethodInvocation.php line 79

    at CG\Proxy\MethodInvocation->proceed()
        in /project_home/var/cache/dev/jms_diextra/proxies/AppBundle-Controller-CalendarController.php line 21

    at EnhancedProxye0ff800f_2852d4e43776e45f00f38751350397dbf530e575\__CG__\AppBundle\Controller\CalendarController->createAction(object(Request))
        in  line 

    at call_user_func_array(array(object(CalendarController), 'createAction'), array(object(Request)))
        in /project_home/var/cache/dev/classes.php line 4228

    at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request), 1)
        in /project_home/var/cache/dev/classes.php line 4183

    at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), 1, true)
        in /project_home/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php line 168

    at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
        in /project_home/web/app_dev.php line 28

    at require('/project_home/web/app_dev.php')
        in /project_home/vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Resources/config/router_dev.php line 40