mySQL很多很多WHERE条件没有结果，cakephp分页

Question

我正在为CakePHP应用程序执行自定义分页规则。蛋糕分页创建的查询不会返回任何结果，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")

users_projects：

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

它应返回3个结果，但不会返回任何结果。

分页结构如下：

$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

查询仅返回WHERE条件中指定的包含Project.project_leader_id的项目，并且不考虑Assignment.user_id条件。

Answer 1

我发现了问题所在。 'join'键下的分页变量中的'conditions'子句必须在没有双箭头的情况下构造。

更改

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

到

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

解决了这个问题。

初始查询如下所示：

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

并在更改后：

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