cakephp - 如何计算cakephp中的重复值？

Question

我需要找出每个值重复了多少次。这是我到目前为止所得到的。我想用它来计算民意调查中的选票。

$this->set('votes', $this->Answer->Vote->find('all', array(
                    'fields' => array('Vote.answer_id'),
                    'group' => array('Vote.answer_id HAVING COUNT(*) > 1'))));

它会返回哪些值是重复的，如下所示:

1st answer
2nd answer
4th answer

但我仍然需要这个数字，以显示它重复了多少次。像这样的东西。

1st answer (5)
2nd answer (3)
3rd answer (1) // not duplicated
4th answer (8)

编辑: 对我有用的解决方案

在 Controller 中:

$this->set('votes', $this->Answer->Vote->find('all', array(
       'fields' => array('Vote.answer_id', 'count(*) as TotalVotes'),
       'group' => array('Vote.answer_id HAVING COUNT(*) >= 1'))));

查看中:

foreach ($votes as $vote):
echo $vote[0]['TotalVotes'];
endforeach;

Answer 1

此查询将起作用。

SELECT answer_id, COUNT(*) AS TotalVotes FROM votes GROUP BY answer_id HAVING COUNT(*) > 1

CakePHP 等效查找条件:

$result = $this->Answer->Vote->find('all', array(
                'fields' => array('Vote.answer_id', 'count(*) as TotalVotes'),
                'group' => array('Vote.answer_id HAVING COUNT(*) > 1')));

您将在 索引 [0] 处的单独数组中找到 TotalVotes。要解决此问题，只需在选择查询之前编写以下代码即可:

$this->Answer->Vote->virtualFields['TotalVotes'] = 0;