mySQL 在 cakePHP 中加入查询

mySQL Join Query in cakePHP

我是 cakePHP 的新手,我正在阅读手册并购买了这本书,我遇到了一个问题,需要一些帮助。

目前我这样查询我的数据库(这是全部 class):

<?php

class TapplicantController extends AppController {

    public function index() {

        $this->set('page_title', 'Dashboard');

        $tapplicant = $this->Tapplicant->query("SELECT tapplicant.AppID, tapplicant.AppIPAddress, tapplicant.AppAffID, tapplicant.AppDate, tapplicant.FirstName, tapplicant.LastName, tapplicant.Email, tapplicant.AppDomain, toutcome.AffCommission FROM tapplicant INNER JOIN toutcome ON tapplicant.AppID=toutcome.AppID LIMIT 0,15 ");

        $this->set('tapplicant', $tapplicant );     


    }
}

然后我像这样显示它并且工作正常:

<?php foreach ($tapplicant as $tapplicant) : ?>
        <tr>

            <td><?=$tapplicant['tapplicant']['AppID']; ?></td> 
            <td><?=$tapplicant['tapplicant']['AppAffID']; ?></td> 
            <td><?=$tapplicant['tapplicant']['FirstName']; ?></td>
            <td><?=$tapplicant['tapplicant']['LastName']; ?></td>
            <td><?=$tapplicant['tapplicant']['Email']; ?></td>
            <td><?=$tapplicant['tapplicant']['AppDate']; ?></td>
            <td><?=$tapplicant['tapplicant']['AppDomain']; ?></td>
            <td><?=$tapplicant['tapplicant']['AffCommission']; ?></td>

        </tr>
        <?php endforeach; ?>

问题是我内部连接了 2 个表但它不起作用,我收到以下错误:未定义的索引:AffCommission

您不应该使用 query() 在 CakePHP 中检索数据,除非您真的不能使用 Cake way 编写查询。要在 Cake 中使用联接,您的查询应如下所示:-

$tapplicant = $this->Tapplicant->find(
    'all',
    array(
        'fields' => array(
            'Tapplicant.*',
            'Toutcome.*'
        ),
        'joins' => array(
            array(
                'table' => 'toutcome',
                'alias' => 'Toutcome',
                'type' => 'INNER',
                'conditions' => array('Tapplicant.AppID = Toutcome.AppID')
            )
        ),
        'limit' => 15
    )
);

生成的数组应该由模型别名索引,所以 $tapplicant['tapplicant']['AffCommission']; 应该类似于 $tapplicant['Toutcome']['AffCommission'];。最简单的调试方法是查看返回的数组是什么,因此在您的代码中使用 print_r($tapplicant)debug($tapplicant) 来查看返回的内容。

只要您正确关联模型,Containable behaviour 可能会使它变得更加简单。

您没有使用 CakePHP naming conventions 而您确实应该使用,否则您在使用 Cake 时会遇到很多困难。我建议您从头开始阅读在线文档,然后再深入研究!

Try:
$options['joins'] = array(
    array(
        'table' => 'toutcome',
        'alias' => 'Toutcome',
        'type' => 'INNER',
        'conditions' => array('Tapplicant.AppID = Toutcome.AppID')
         )
);

$options['fields'] = array(
    Tapplicant.AppID, 
    Tapplicant.AppIPAddress, 
    Tapplicant.AppAffID, 
    Tapplicant.AppDate, 
    Tapplicant.FirstName, 
    Tapplicant.LastName, 
    Tapplicant.Email, 
    Tapplicant.AppDomain, 
    Toutcome.AffCommission
);

$options['limit'] = 15;

$tapplicant = $this->Tapplicant->find('all', $options);