FOSOAuthServerBundle 无法识别的字段错误

在Symfony2中，我正在尝试实现FOS''OAuthServerBundle，但遇到了一个奇怪的错误。按照这里的指南以及GitHub上的官方指南进行操作后，我遇到了一个错误，上面写着：

Unrecognized field: randomId
500 Internal Server Error - ORMException

这是 FOS''OAuthServerBundle 中客户端实体/模型中的受保护变量。我一定在这里错过了一些简单的东西，但对于我的生活，我无法弄清楚是什么。

还有其他人遇到过类似的错误吗？

尝试转到以下位置时会发生此错误：

http://symfony.local/app_dev.php/oauth/v2/token?grant_type=client_credentials&client_id=fd87dddb-6c29-11e4-90f3-b8ca3aa16897_fzhfyllumw0kwwgkocg80wkg8sc4ko0soww0cks4gc0ogggk&client_secret=[secret redacted]

堆栈跟踪

Doctrine'ORM'ORMException: Unrecognized field: randomId
at n/a
    in /home/johnny/Development/symfonyProject/vendor/doctrine/orm/lib/Doctrine/ORM/ORMException.php line 100
at Doctrine'ORM'ORMException::unrecognizedField('randomId')
    in /home/johnny/Development/symfonyProject/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/BasicEntityPersister.php line 1681
at Doctrine'ORM'Persisters'BasicEntityPersister->getSelectConditionStatementColumnSQL('randomId', null)
    in /home/johnny/Development/symfonyProject/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/BasicEntityPersister.php line 1610
at Doctrine'ORM'Persisters'BasicEntityPersister->getSelectConditionStatementSQL('randomId', 'fzhfyllumw0kwwgkocg80wkg8sc4ko0soww0cks4gc0ogggk', null)
    in /home/johnny/Development/symfonyProject/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/BasicEntityPersister.php line 1701
at Doctrine'ORM'Persisters'BasicEntityPersister->getSelectConditionSQL(array('id' => 'fd87dddb-6c29-11e4-90f3-b8ca3aa16897', 'randomId' => 'fzhfyllumw0kwwgkocg80wkg8sc4ko0soww0cks4gc0ogggk'), null)
    in /home/johnny/Development/symfonyProject/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/BasicEntityPersister.php line 1115
at Doctrine'ORM'Persisters'BasicEntityPersister->getSelectSQL(array('id' => 'fd87dddb-6c29-11e4-90f3-b8ca3aa16897', 'randomId' => 'fzhfyllumw0kwwgkocg80wkg8sc4ko0soww0cks4gc0ogggk'), null, '0', '1', null, null)
    in /home/johnny/Development/symfonyProject/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/BasicEntityPersister.php line 746
at Doctrine'ORM'Persisters'BasicEntityPersister->load(array('id' => 'fd87dddb-6c29-11e4-90f3-b8ca3aa16897', 'randomId' => 'fzhfyllumw0kwwgkocg80wkg8sc4ko0soww0cks4gc0ogggk'), null, null, array(), '0', '1', null)
    in /home/johnny/Development/symfonyProject/vendor/doctrine/orm/lib/Doctrine/ORM/EntityRepository.php line 196
at Doctrine'ORM'EntityRepository->findOneBy(array('id' => 'fd87dddb-6c29-11e4-90f3-b8ca3aa16897', 'randomId' => 'fzhfyllumw0kwwgkocg80wkg8sc4ko0soww0cks4gc0ogggk'))
    in /home/johnny/Development/symfonyProject/vendor/friendsofsymfony/oauth-server-bundle/FOS/OAuthServerBundle/Entity/ClientManager.php line 55
at FOS'OAuthServerBundle'Entity'ClientManager->findClientBy(array('id' => 'fd87dddb-6c29-11e4-90f3-b8ca3aa16897', 'randomId' => 'fzhfyllumw0kwwgkocg80wkg8sc4ko0soww0cks4gc0ogggk'))
    in /home/johnny/Development/symfonyProject/vendor/friendsofsymfony/oauth-server-bundle/FOS/OAuthServerBundle/Model/ClientManager.php line 41
at FOS'OAuthServerBundle'Model'ClientManager->findClientByPublicId('fd87dddb-6c29-11e4-90f3-b8ca3aa16897_fzhfyllumw0kwwgkocg80wkg8sc4ko0soww0cks4gc0ogggk')
    in /home/johnny/Development/symfonyProject/vendor/friendsofsymfony/oauth-server-bundle/FOS/OAuthServerBundle/Storage/OAuthStorage.php line 102
at FOS'OAuthServerBundle'Storage'OAuthStorage->getClient('fd87dddb-6c29-11e4-90f3-b8ca3aa16897_fzhfyllumw0kwwgkocg80wkg8sc4ko0soww0cks4gc0ogggk')
    in /home/johnny/Development/symfonyProject/vendor/friendsofsymfony/oauth2-php/lib/OAuth2/OAuth2.php line 707
at OAuth2'OAuth2->grantAccessToken(object(Request))
    in /home/johnny/Development/symfonyProject/vendor/friendsofsymfony/oauth-server-bundle/FOS/OAuthServerBundle/Controller/TokenController.php line 40
at FOS'OAuthServerBundle'Controller'TokenController->tokenAction(object(Request))
    in  line 
at call_user_func_array(array(object(TokenController), 'tokenAction'), array(object(Request)))
    in /home/johnny/Development/symfonyProject/app/bootstrap.php.cache line 2976
at Symfony'Component'HttpKernel'HttpKernel->handleRaw(object(Request), '1')
    in /home/johnny/Development/symfonyProject/app/bootstrap.php.cache line 2938
at Symfony'Component'HttpKernel'HttpKernel->handle(object(Request), '1', true)
    in /home/johnny/Development/symfonyProject/app/bootstrap.php.cache line 3087
at Symfony'Component'HttpKernel'DependencyInjection'ContainerAwareHttpKernel->handle(object(Request), '1', true)
    in /home/johnny/Development/symfonyProject/app/bootstrap.php.cache line 2337
at Symfony'Component'HttpKernel'Kernel->handle(object(Request))
    in /home/johnny/Development/symfonyProject/web/app_dev.php line 18