Cakephp 2发现邻居环绕

问题描述 投票:1回答:1

我正在使用cakephp 2,幸运的是,查找('邻居')仍然存在。然而,我想要的是它包裹着。

因此,如果我按id排序并选择第一个id,我希望下一个id记录(作品),但是之前的最高id记录(如果你有第一个id,则返回null)。反之亦然,如果您选择最高ID,我希望下一个ID最低。

有没有办法轻松实现这一目标?

cakephp-2.0
1个回答
0
投票

如果find('neighbors')没有返回下一个或上一个数组,您可以自己轻松地抓住下一个或上一个条目。这是一个示例实现:

public function view($id) {
    // Find neighboring products by 'id'
    $neighbors = $this->Product->find('neighbors', array(
        'field' => 'id',
        'value' => $id
    ));

    // If the "prev" neighbor returns null, then assign it to the
    // last item in the model as sorted by id.
    if ($neighbors['prev'] === null)
    {
        $neighbors['prev'] = $this->Product->find('first', array(
            'order' => array('Product.id' => 'desc')
        ));
    // If the "next" neighbor returns null, then assign it to the
    // first item in the model as sorted by id.
    } elseif ($neighbors['next'] === null) {
        $neighbors['next'] = $this->Product->find('first', array(
            'order' => array('Product.id' => 'asc')
        ));
    }

    // Set the data to 'neighbors' for use in the view. 
    $this->set('neighbors', $neighbors);
}
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