Question

您好我正在使用CakePHP版本 - 2.5.5。

我有一个表名chat_ategory_mages我希望通过降序获得频率顺序的平均数。了解频率请查看 - How to get Average hits between current date to posted date in MySQL?

chat_ategory_mages

id        chat_category_id    hits       created
------------------------------------------------
1         5                  10       2014-11-07 11:07:57
2         5                  8        2014-11-10 05:10:20
3         5                  70       2014-10-04 08:04:22

代码

$order=array('Frequency' => 'DESC');
$fields=array(
    'ChatCategoryImage.id',
    'ChatCategoryImage.chat_category_id',
    'ChatCategoryImage.created',
    'ChatCategoryImage.hits',
    'hits/(DATEDIFF(NOW(),created)) AS Frequency',
);

QUERY-1

$rndQry=$this->ChatCategoryImage->find('all',array('conditions'=>array('ChatCategoryImage.chat_category_id'=>$cetegory_id), 'fields'=>$fields, 'order'=>$order, 'limit'=>10));
pr($rndQry); //WORKING FINE

QUERY-2

//THIS IS NOT WORKING
$this->Paginator->settings = array(
        'conditions'=>array('ChatCategoryImage.chat_category_id'=>$cetegory_id),
        'fields'=>$fields,
        'limit' => 10,
        'order' => $order,
);
$getCategoryImages = $this->Paginator->paginate('ChatCategoryImage');
pr($getCategoryImages); //NOT WORKING

上面的表格，如果我写简单的cakephp查询，order工作正常，但当我使用cakephp分页时，它无效。如果我正在使用$order=array('hits' => 'DESC');这就完美了。一致显示结果70,10,8，但当我添加Frequency时，结果不是降序。

Mysql查询

QUERY-1：

选择ChatCategoryImage。id，ChatCategoryImage。chat_category_id，ChatCategoryImage。hits，ChatCategoryImage。{{1} }，命中/（DATEDIFF（NOW（），已创建））AS频率，来自created。myshowcam AS chat_category_images WHERE ChatCategoryImage。ChatCategoryImage = 5订购BY chat_category_id DESC LIMIT 10

QUERY-2：

选择Frequency。ChatCategoryImage，id。ChatCategoryImage，chat_category_id。ChatCategoryImage，hits。{{1} }，命中/（DATEDIFF（NOW（），创建））AS频率，FROM ChatCategoryImage。created AS myshowcam WHERE chat_category_images。ChatCategoryImage = 5 LIMIT 10

问题是什么以及为什么它不会在第二个查询中出现ChatCategoryImage？

由于茅

Answer 1

您可以使用virtualFields

$this->ChatCategoryImage->virtualFields = array('Frequency' => 'hits/(DATEDIFF(NOW(),created))');

改变订单方式

$order = array('Frequency' => 'desc');

Answer 2

这件事发生在我身上。您必须在paginate函数中添加第三个参数$ whitelist。例如。

$this->Paginator->settings = array(
        'conditions'=>array('ChatCategoryImage.chat_category_id'=>$cetegory_id),
        'fields'=>$fields,
        'limit' => 10,
        'order' => $order,
);
$scope =  array();
$whitelist = array('ChatCategoryImage.id', ...); //The fields you want to allow ordering.

$getCategoryImages = $this->Paginator->paginate('ChatCategoryImage', $scope, $whitelist);
pr($getCategoryImages);

我不知道为什么会这样。我试图在paginate函数中看到代码，但我无法弄明白。

Answer 3

你的代码错了

    $this->paginate = array(
                   'conditions' => array('ChatCategoryImage.chat_category_id'=>$cetegory_id), 
                   'limit' => 10, 'order' => 'Frequency' => 'DESC');
    $getAllCourses = $this->paginate('ChatCategoryImage');

CakePHP命令不起作用

3 个答案: