Doctrine 2 多对一映射注释

Question

TwitterTweets 实体：

/**
 * MyBundle\CoreBundle\Entity\TwitterTweets
 *
 * @ORM\Table(name="twitter_tweets")
 * @ORM\Entity
 */
class TwitterTweets
{
    /**
     * @var TwitterUsers
     *
     * @ORM\ManyToOne(targetEntity="TwitterUsers", inversedBy="tweets")
     * @ORM\JoinTable(name="twitter_tweets",
     *   joinColumns={
     *     @ORM\JoinColumn(name="twitter_user_id", referencedColumnName="twitter_id")
     *   }
     * )
     */
    private $twitterUser;
}

TwitterUsers 实体：

/**
 * MyBundle\CoreBundle\Entity\TwitterUsers
 *
 * @ORM\Table(name="twitter_users")
 * @ORM\Entity
 */
class TwitterUsers
{
    /**
     * @var TwitterTweets
     *
     * @ORM\OneToMany(targetEntity="TwitterTweets", mappedBy="twitterUser")
     */
    private $tweets;
}

twitter_tweets 表：

CREATE TABLE `twitter_tweets` (
 `period` int(6) unsigned NOT NULL,
 `tweet_id` varchar(30) NOT NULL,
 `twitter_user_id` bigint(20) unsigned NOT NULL,
 `tweet` varchar(255) NOT NULL,
 `url` text NOT NULL,
 `retweet_count` varchar(10) NOT NULL DEFAULT '0',
 `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
 PRIMARY KEY (`period`,`tweet_id`),
 KEY `period` (`period`),
 KEY `tweet_id` (`tweet_id`),
 KEY `twitter_user_id` (`twitter_user_id`),
 KEY `created_at` (`created_at`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

twitter_users 表：

CREATE TABLE `twitter_users` (
 `twitter_id` bigint(20) unsigned NOT NULL,
 `user` varchar(255) NOT NULL,
 `username` varchar(255) NOT NULL,
 `profile_image_url` text NOT NULL,
 PRIMARY KEY (`twitter_id`),
 KEY `user` (`user`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

执行简单的 SELECT 时出现此错误：

$this->getDoctrine()->getRepository('MyBundleCoreBundle:TwitterTweets')->findOneBy(array( 'tweetId' => $data->tweet_id ))

找不到列：1054 '字段列表'中的未知列't0.twitterUser_id'

SELECT t0.period AS period1, t0.tweet_id AS tweet_id2, t0.tweet AS tweet3,
t0.url AS url4, t0.retweet_count AS retweet_count5, t0.created_at AS created_at6,
t0.twitterUser_id AS twitterUser_id7
FROM twitter_tweets t0 WHERE t0.tweet_id = ?

我该如何解决这个问题？ 我试图只设置 @ORM\JoinColumn （没有 JoinTable 注释），但我得到了这个错误：

"message":"SQLSTATE[42S02]: 未找到基表或视图：1146 表 'database.twittertweets_twittertrends' 不存在"

Answer 1

使用多对一单向关联映射解决：http://docs.doctrine-project.org/projects/doctrine-orm/en/2.0.x/reference/association-mapping.html#many-to-one-unidirectional

TwitterTweets 实体：

/**
 * MyBundle\CoreBundle\Entity\TwitterTweets
 *
 * @ORM\Table(name="twitter_tweets")
 * @ORM\Entity
 */
class TwitterTweets
{
    /**
     * @var TwitterUsers
     *
     * @ORM\ManyToOne(targetEntity="TwitterUsers")
     * @ORM\JoinColumn(name="twitter_user_id", referencedColumnName="twitter_id")
     */
    private $twitterUser;
}

TwitterUsers 实体：

/**
 * MyBundle\CoreBundle\Entity\TwitterUsers
 *
 * @ORM\Table(name="twitter_users")
 * @ORM\Entity
 */
class TwitterUsers
{
    // ... no properties needed
}

感谢 jperovic 的帮助 :)

Answer 2

实际上Many-To-Many 是通过@JoinTable 定义的。要定义Many-To-One，您只需执行以下操作：

/**
     * @var TwitterUsers
     *
     * @ORM\ManyToOne(targetEntity="TwitterUsers", inversedBy="tweets")
     * @ORM\JoinColumn(name="twitter_user_id", referencedColumnName="twitter_id")
     */