php - Cakephp HABTM 需要多个连接

Question

我对 Cakephp 很陌生。我的所有模型协会都工作正常，但这个问题困扰着我，我还没有找到任何人解决了类似的问题。就这样..

我有 4 张 table :
人

+-----+-------------------+
| Id  | first_name        |
+-----+-------------------+
|   1 | jim               | 
|   2 | bob               | 
+-------------------------+ 

facility_project_people

+-----+---------------------+-----------+
| Id  | facility_project_id | person_id |
+-----+---------------------+-----------+
|   1 |          5          |     1     |
|   2 |          6          |     1     |
|   3 |          7          |     2     |
+---------------------------+-----------+

facility_projects

+-----+-------------+-----------+-----------+
| Id  | facility_id | project_id|  type_id  |
+-----+-------------+-----------+-----------+
|   1 |       1     |     1     |     1     |
|   2 |       2     |     3     |     2     |
|   3 |       2     |     5     |     3     |
+-------------------+-----------+-----------+

projects

+-----+-------------+
| Id  | name        |
+-----+-------------+
|   1 |  Audit      | 
|   2 |  Inventory  | 
|   3 |  Tax        |
|   4 |  Consulting |
+-------------------+ 

So I have people who can be involved in many projects per facility
I'm trying to make a model association to get from Person to the Projects they are involved with.

The MySQL query would be something like:
SELECT p.first_name, pr.name FROM <code>people</code> p left join <code>facility_project_people</code> fpp ON p.<code>id</code> = fpp.<code>person_id</code> left join <code>facility_projects</code> fp ON fpp.facility_project_id = fp.id left join <code>projects</code> pr ON fp.project_id = pr.id

Using a hasAndBelongsToMany Assocation, I understand how to get as far as the facility_projects table.

class Person extends AppModel {
    public $hasAndBelongsToMany = array(
    PersonFacilityProject' => array(
            'className' => 'Project',
            'joinTable' => 'facility_project_people',
            'foreignKey' => 'person_id',
            'associationForeignKey' => 'facility_project_id',
        ),
    }
} 

显然这并不能满足我的需要

查看某人时，我想查看相关项目，但我不知道如何访问项目表。我希望能够向关联添加另一个连接表和外键，但 cakephp 似乎不允许这样做。

我很欣赏任何见解。

Answer 1

您没有说明您使用的 cakephp 版本。但是，您可以使用“contain”来执行此操作(因为您的模型并非全部直接相关)，如下所示:

    $conditions = [
        'contain' => [
            'FacilityProjectPerson'=>[
                'FacilityProject'=>[
                    'Project'=>[
                        'fields'=>['Project.name']
                    ],
                ],
            ], 
        ],
    //  'conditions' => [//just in case you need conditions for selecting people
    //      'Person.id' => $this->id, 
    //  ],
        'fields'=>['Person.first_name']
    ];

    $this->Person->find('all',$conditions);