mysql - 表模型的问题

Question

我最近遇到了表模型的问题，我无法真正解释为什么会发生这种情况。我想从表中选择所有内容并按降序返回。但是当我尝试显示它时，什么也没有显示:

代码:

<?php

//Will be used at a later date

namespace Blog\Model\Table;

use Zend\Db\TableGateway\TableGateway;

class Blog extends TableGateway
{
    public function __construct($adapter)
    {
        parent::__construct('posts', $adapter);
    }

    public function displayPosts()
    {
        $adapter = $this->getAdapter();
        $result = $adapter->query('SELECT * FROM `posts` ORDER BY `date_added` DESC');
        return $result;
    }
}

结果:

但是当我添加 $id 参数时，它会显示数据:

代码:

<?php

//Will be used at a later date

namespace Blog\Model\Table;

use Zend\Db\TableGateway\TableGateway;

class Blog extends TableGateway
{
    public function __construct($adapter)
    {
        parent::__construct('posts', $adapter);
    }

    public function displayPosts($id = 6)
    {
        $adapter = $this->getAdapter();
        $result = $adapter->query('SELECT * FROM `posts` WHERE `post_id` = ?', array($id));
        return $result;
    }
}

结果:

奇怪的是，它在有论证的情况下起作用，而不是在没有任何想法的情况下起作用？

Answer 1

您需要通过 post_id 订购

public function displayPosts()
{
    $adapter = $this->getAdapter();
    $result = $adapter->query('SELECT * FROM `posts`')->order(array('post_id' => 'DESC'));

    return $result;
}