[英]Complex paginate with NOT IN condition cakephp 2
我有一個小問題,以使我的查詢以正確的方式工作。
我的詢問應該為我提供實際學期中的所有講座,但僅僅是那些我還沒有參加的講座。 因此在SQL中將是:
SELECT * FROM lectures WHERE semester = $currentSemester AND lectures.id NOT IN (SELECT lectures_id FROM participaters WHERE user_id = $this->Auth->user('id'))
我已經得到的是以下內容:
$this->paginate = array(
'conditions' => array(
'Lecture.semester >=' => $currentSemester,
'not' => array(
'Lecture.id' => array(
),
),
),
'order' => array(
'Lecture.name' => 'asc',
),
'contain' => array(
'Participater',
),
);
$this->set('lectures', $this->paginate($this->Lecture));
如何使用user_id定義條件? 也許有人可以幫忙嗎? 對於我的英語感到抱歉,如果有任何錯誤:)
首先找到要在查詢中排除的ID列表,然后使用條件為'Lecture.id!='=> $ ids的ID列表。
假設您已將模型參與者連接到模型講座,則查詢可能如下所示。
//retrieve the list of excluded ids
$excluded_ids = $this->Lecture->Participater->find('list',array(
'conditions' => array(
'Participater.user_id' => $this->Auth->user('id')
),
'fields' => array('lecture_id')
);
$this->paginate = array(
'conditions' => array(
'Lecture.semester >=' => $currentSemester,
'Lecture.id !=' => $excluded_ids,//put the excluded ids here
),
'order' => array(
'Lecture.name' => 'asc',
),
'contain' => array(
'Participater',
),
);
$this->set('lectures', $this->paginate($this->Lecture));
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