symfony2 mongodb 中嵌入文档上的错误“字段 'xxx' 必须是一个数组，但在文档中属于对象类型”

Question

我正在 Symfony2 中使用 mongodb 数据库制作应用程序。我对 Symfony 和 Mongodb 有点陌生。

我有一个文档部分，其中包含 EmbedMany 的字段限制。

这是代码：

class Section
{
    ....
    
    /** @MongoDB\EmbedMany(targetDocument="Restriction") */
    private $restrictions = array();

    public function __construct()
    {
        $this->restrictions = new \Doctrine\Common\Collections\ArrayCollection();
    }
    
    /**
     * Add restriction
     *
     * @param DelfosBundle\Document\Restriction $restriction
     */
    public function addRestriction(\DelfosBundle\Document\Restriction $restriction)
    {
        $this->restrictions[] = $restriction;
    }

    /**
     * Remove restriction
     *
     * @param DelfosBundle\Document\Restriction $restriction
     */
    public function removeRestriction(\DelfosBundle\Document\Restriction $restriction)
    {
        $this->restrictions->removeElement($restriction);
    }

    /**
     * Get restrictions
     *
     * @return \Doctrine\Common\Collections\Collection $restrictions
     */
    public function getRestrictions()
    {
        return $this->restrictions;
    }
}

当我收到一个表单时，我会在 Section 文档中添加一个新的 Restriction 对象并保存该文档：

$formAdd->handleRequest($request);
if ($formAdd->isValid()) {
    $dm = $this->get('doctrine_mongodb')->getManager();
    $restriction = $formAdd->getData();
    $section->addRestriction($restriction);
    $dm->persist($section);
    $dm->flush();
}

然后我在 flush 方法中收到下一个错误： localhost:27017：“restrictions”字段必须是一个数组，但在文档 {_id:“e5a0aaa531153335963de37ccaa5f471”}

中属于 Object 类型

但是文档在数据库中的限制下正确保存。

这些是我正在使用的版本：

david@pfc:/var/www/html/delfos$ php bin/console --version
Symfony version 2.8.3 - app/dev/debug

david@pfc:/var/www/html/delfos$ composer show -i
doctrine/annotations                 v1.2.7             Docblock Annotations Parser
doctrine/cache                       v1.6.0             Caching library offering an object-oriented API for many cache backends
doctrine/collections                 v1.3.0             Collections Abstraction library
doctrine/common                      v2.6.1             Common Library for Doctrine projects
doctrine/dbal                        v2.5.4             Database Abstraction Layer
doctrine/doctrine-bundle             1.6.2              Symfony DoctrineBundle
doctrine/doctrine-cache-bundle       1.3.0              Symfony Bundle for Doctrine Cache
doctrine/inflector                   v1.1.0             Common String Manipulations with regard to casing and singular/plural rules.
doctrine/instantiator                1.0.5              A small, lightweight utility to instantiate objects in PHP without invoking their constructors
doctrine/lexer                       v1.0.1             Base library for a lexer that can be used in Top-Down, Recursive Descent Parsers.
doctrine/mongodb                     1.2.1              Doctrine MongoDB Abstraction Layer
doctrine/mongodb-odm                 1.0.5              Doctrine MongoDB Object Document Mapper
doctrine/mongodb-odm-bundle          3.0.2              Symfony2 Doctrine MongoDB Bundle
doctrine/orm                         v2.5.4             Object-Relational-Mapper for PHP
friendsofsymfony/user-bundle         dev-master e770bfa Symfony FOSUserBundle
incenteev/composer-parameter-handler v2.1.2             Composer script handling your ignored parameter file
ircmaxell/password-compat            v1.0.4             A compatibility library for the proposed simplified password hashing algorithm: https://wiki.php.net/rfc/password_hash
jdorn/sql-formatter                  v1.2.17            a PHP SQL highlighting library
kriswallsmith/assetic                v1.3.2             Asset Management for PHP
monolog/monolog                      1.17.2             Sends your logs to files, sockets, inboxes, databases and various web services
paragonie/random_compat              v1.2.0             PHP 5.x polyfill for random_bytes() and random_int() from PHP 7
psr/log                              1.0.0              Common interface for logging libraries
sensio/distribution-bundle           v5.0.4             Base bundle for Symfony Distributions
sensio/framework-extra-bundle        v3.0.13            This bundle provides a way to configure your controllers with annotations
sensio/generator-bundle              v3.0.6             This bundle generates code for you
sensiolabs/security-checker          v3.0.2             A security checker for your composer.lock
swiftmailer/swiftmailer              v5.4.1             Swiftmailer, free feature-rich PHP mailer
symfony/assetic-bundle               v2.7.1             Integrates Assetic into Symfony2
symfony/monolog-bundle               v2.8.2             Symfony MonologBundle
symfony/phpunit-bridge               v2.8.3             Symfony PHPUnit Bridge
symfony/polyfill-apcu                v1.1.0             Symfony polyfill backporting apcu_* functions to lower PHP versions
symfony/polyfill-intl-icu            v1.1.0             Symfony polyfill for intl's ICU-related data and classes
symfony/polyfill-mbstring            v1.1.0             Symfony polyfill for the Mbstring extension
symfony/polyfill-php54               v1.1.0             Symfony polyfill backporting some PHP 5.4+ features to lower PHP versions
symfony/polyfill-php55               v1.1.0             Symfony polyfill backporting some PHP 5.5+ features to lower PHP versions
symfony/polyfill-php56               v1.1.0             Symfony polyfill backporting some PHP 5.6+ features to lower PHP versions
symfony/polyfill-php70               v1.1.0             Symfony polyfill backporting some PHP 7.0+ features to lower PHP versions
symfony/polyfill-util                v1.1.0             Symfony utilities for portability of PHP codes
symfony/security-acl                 v2.8.0             Symfony Security Component - ACL (Access Control List)
symfony/swiftmailer-bundle           v2.3.11            Symfony SwiftmailerBundle
symfony/symfony                      v2.8.3             The Symfony PHP framework
symfony/var-dumper                   v3.0.3             Symfony mechanism for exploring and dumping PHP variables
twig/twig                            v1.24.0            Twig, the flexible, fast, and secure template language for PHP

Answer 1

好的，我找到了问题。

嵌入文档定义必须是 @MongoDB\EmbeddedDocument，而我使用的是 @MongoDB\Document。

所以在我的例子中，嵌入在 Section 类中的 Restriction 类必须像这样定义：

/**
 * @MongoDB\EmbeddedDocument
 */
class Restriction
{
    /**
     * @MongoDB\Id(strategy="UUID")
     */
    protected $id;

    ....
}