symfony2：在类中插入ace

Question

我在课堂上尝试添加ace时出现此错误：

  

警告：PDO :: quote（）期望参数1为字符串，对象在... / vendor / doctrine / dbal / lib / Doctrine / DBAL / Connection.php第568行中给出

我的代码：

$oid = new ObjectIdentity('class', new Post());

$aclProvider = $this->get('security.acl.provider');

try {
    $acl = $aclProvider->createAcl($oid);
} catch (AclAlreadyExistsException $exists) {
    return;
}

$builder = new MaskBuilder();
$builder->add('view');
$mask = $builder->get();

$acl->insertClassAce(new RoleSecurityIdentity('IS_AUTHENTICATED_ANONYMOUSLY'), $mask);

$aclProvider->updateAcl($acl);

有什么想法吗？