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我正在为 CakePHP 应用程序做一个自定义分页规则。蛋糕分页创建的查询不返回任何结果，我相信它应该。

表格如下：

projects ('id', 'project_leader_id'), 
users ('id', 'name'),
users_projects ('id', 'project_id', 'user_id')

projects many-many users_projects on project_id,
users many-many users_projects on user_id,
users one-many projects on project_leader_id

样本数据：

项目：

id (1), project_leader_id (1) 
id (2), project_leader_id (2)
id (3), project_leader_id (3)

用户：

id (1), name ("Peter")
id (2), name ("Joe")
id (3), name ("Mark")

用户项目：

id (1), project_id (1), user_id (2)
id (2), project_id (1), user_id (3)
id (3), project_id (2), user_id (1)
id (4), project_id (2), user_id (2)
id (5), project_id (3), user_id (3)
id (6), project_id (3), user_id (1)

我的查询：

SELECT Project.id, User.name
FROM projects AS Project
LEFT JOIN users_projects AS Assignment
    ON Project.id = Assignment.project_id
LEFT JOIN users AS User
    ON User.id = Assignment.user_id
WHERE Project.project_leader_id = 1
    OR Assignment.user_id = 1

它应该返回 3 个结果，但它不返回任何结果。

分页结构是这样的：

$this->paginate = array(
'Project' => array(
    'joins' => array(
        array(
            'table' => 'users_projects', 
            'alias' => 'Assignment',
            'type' => 'LEFT',
            'conditions' => array(
                'Assignment.project_id' => 'Project.id',
            )
        )
    ),
    'conditions' => array(
        'OR' => array(
            'Assignment.user_id' => $this->Auth->User('id'),
            'Project.project_leader_id' => $this->Auth->User('id')
        )
    )
));

更新

该查询仅返回包含Project.project_leader_idWHERE 条件中指定的项目，并且不考虑Assignment.user_id条件。

4

1 回答 1

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I found out what the problem was. The 'conditions' clause in the pagination variable under the 'joins' key has to be constructed without the double arrow.

Changing 

'conditions' => array('Assignment.project_id' => 'Project.id')

to 

'conditions' => array('Assignment.project_id = Project.id')

solved the problem.

The initial query looked like this:

LEFT JOIN `consultants_assignments` AS `consultantsAssignment` ON
(`consultantsAssignment`.`project_id` = `Project.id`)

and after the change:

LEFT JOIN `consultants_assignments` AS `consultantsAssignment` ON
(`consultantsAssignment`.`project_id` = `Project`.`id`)
于 2012-09-18T15:23:30.847 回答