Question

问题
我正在尝试创建一个网站，用户可以发布帖子，然后他们的朋友可以看到这些帖子。与facebook，twitter等相似我达到了用户可以成为朋友并且可以发布内容的程度。但是，我坚持将显示的帖子限制在用户的朋友帖子中。目前，每个用户都可以看到每个帖子我在MVC架构中使用PDO。

数据库结构

TABLE `friends` (
    `friendship_id` int(11) NOT NULL AUTO_INCREMENT,
    `user_one` int(11) NOT NULL,
    `user_two` int(11) NOT NULL,
    PRIMARY KEY (`friendship_id`),
    FOREIGN KEY (user_one) REFERENCES users(user_id),
    FOREIGN KEY (user_two) REFERENCES users(user_id)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

TABLE `posts` (
 `post_id` int(11) unsigned NOT NULL AUTO_INCREMENT,
 `post_text` text NOT NULL,
 `user_id` int(11) unsigned NOT NULL,
 PRIMARY KEY (`post_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

模型

    /**
     * Get all posts from the suer's friends
     * @return array an array with several objects (the posts)
     */
    public static function getAllPosts()
    {   
        $my_id = Session::get('user_id');

        $database = DatabaseFactory::getFactory()->getConnection();

        // get all of the user's friends
        $friends = $database->prepare("
                                    SELECT user_one FROM friends WHERE user_two = '$my_id';
                                    SELECT user_two FROM friends WHERE user_one = '$my_id';
                                    ");

        $query = $database->prepare("SELECT post_text FROM posts WHERE user_id = '$my_id' OR user_id = '$friends'");
        $query->execute(array());

        return $query->fetchAll();
    }

控制器

    /**
     * Gets all posts (of the user and his friends).
     */
    public function index()
    {
        $this->View->render('post/index', array(
            'posts' => PostModel::getAllPosts()
        ));
    }

视图

       <?php if ($this->posts) { ?>
            <?php foreach($this->posts as $key => $value) { ?>
                <p><?= htmlentities($value->post_text); ?></p>
            <?php } ?>
        <?php } ?>

错误讯息

PDOStatement类的对象无法转换为 PostModel.php
中的字符串

目标
只显示自己和朋友的帖子。不显示用户帖子，我不是朋友。

更新

更新的模型（感谢您提供有用的评论！）

/**    
 * Get all posts from the suer's friends
 * @return array an array with several objects (the posts)
 */
public static function getAllPosts()
{   
    $my_id = Session::get('user_id');

    $database = DatabaseFactory::getFactory()->getConnection();

    // get all of the user's friends
    $friendsQuery = $database->prepare("
                                SELECT user_one FROM friends WHERE user_two = '$my_id';
                                SELECT user_two FROM friends WHERE user_one = '$my_id';
                                ");

    $friendsQuery->execute();
    $friends = $friendsQuery->fetchAll();

    $query = $database->prepare("SELECT post_text FROM posts WHERE user_id = '$my_id' OR user_id = '$friends'");
    $query->execute(array());

    return $query->fetchAll();
}

新错误消息

PDOStatement :: execute（）：SQLSTATE [HY000]：一般错误：2014年不能在其他未缓冲的查询处于活动状态时执行查询。

限制某些用户的数据库条目的可见性

0 个答案: