CakePHP查询准备与连接语句和子查询 [英] CakePHP query preparation with join statement and subquery

问题描述

我'学习CakePHP，但是我有一个很大的问题，操作与更复杂的数据库查询。
所以我想执行那种查询：

I', learning CakePHP, but I have a great problem with operating with more complex database queries. So I would like to execute that kind of query:

SELECT p.name, b.value
FROM books b LEFT JOIN projects p
ON b.project_id=p.id
WHERE b.created=
(SELECT max(b.created) FROM books b WHERE b.user_id=1)
AND b.user_id=1
GROUP BY p.name

任何人都帮助我使用cakePHP机制来编写查询？

Can anybody help me write this using cakePHP mechanism for preparing queries?

推荐答案

你的代码应该是类似的东西， （ Book belongsTo Project ）

Your code should be something similar to this, assuming Book e Project are in relationship (Book belongsTo Project)

$this->Book->find
(
    'all',
    array
    (
        'fields' => array('Book.value', 'Project.name'),
        'conditions' => array
        (
            'Book.created IN (SELECT MAX(Book.created) FROM books Book WHERE Book.user_id = 1)',
            'Book.user_id' => 1
        ),
        'group' => 'Project.name'
    )
);

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