我有三种模式:
汽车:

+--------------------+------------------+------+-----+---------------------+----------------+
| Field              | Type             | Null | Key | Default             | Extra          |
+--------------------+------------------+------+-----+---------------------+----------------+
| id                 | int(10) unsigned | NO   | PRI | NULL                | auto_increment |
| registration       | varchar(255)     | NO   |     | NULL                |                |
| vin                | varchar(255)     | NO   |     | NULL                |                |
| titular_id         | int(10) unsigned | NO   |     | NULL                |                |
| titular_type       | varchar(255)     | NO   |     | NULL                |                |
| renter_id          | int(10) unsigned | NO   |     | NULL                |                |
| renter_type        | varchar(255)     | NO   |     | NULL                |                |
+--------------------+------------------+------+-----+---------------------+----------------+


Siret公司:

+------------------+------------------+------+-----+---------------------+----------------+
| Field            | Type             | Null | Key | Default             | Extra          |
+------------------+------------------+------+-----+---------------------+----------------+
| id               | int(10) unsigned | NO   | PRI | NULL                | auto_increment |
| siret            | varchar(255)     | NO   |     | NULL                |                |
| siren_company_id | int(10) unsigned | NO   | MUL | NULL                |                |
+------------------+------------------+------+-----+---------------------+----------------+


警报器公司:

+---------------------+------------------+------+-----+---------------------+----------------+
| Field               | Type             | Null | Key | Default             | Extra          |
+---------------------+------------------+------+-----+---------------------+----------------+
| id                  | int(10) unsigned | NO   | PRI | NULL                | auto_increment |
| siren               | varchar(255)     | NO   |     | NULL                |                |
+---------------------+------------------+------+-----+---------------------+----------------+


车辆可以通过名义或承租人与SirenCompany关联。我想要的是为SirenCompany获取所有相关的车辆。

在原始MySQL中,这是我的查询:

select count(*) FROM `vehicles`
inner join `siret_companies`
    on (
        (`vehicles`.`titular_type` = 'SiretCompany' and `vehicles`.`titular_id` = `siret_companies`.`id`)
        OR
        (`vehicles`.`renter_type` = 'SiretCompany' and `vehicles`.`renter_id` = `siret_companies`.`id`)
    )
inner join `siren_companies`
    on `siren_companies`.`id` = `siret_companies`.`siren_company_id`
where `siren_companies`.`id` = 410


现在我想做的是将其作为Eloquent查询运行,但我似乎无法弄清楚。

如果我只考虑标题,我有这个:

return Vehicle::join('siret_companies',function($join) {
    $join
        ->where('vehicles.titular_type', '=',  'SiretCompany')
        ->where('vehicles.titular_id','=', 'siret_companies.id');
})
->join('siren_companies', function($join) {
    $join->on('siren_companies.id', '=', 'siret_companies.siren_company_id');
})
->where('siren_companies.id','=',$this->id)
->count();


但是我似乎无法弄清楚如何编写联接以使其与上面的查询相对应。

最佳答案

这就是我想出的

Vehicle::join('siret_companies', function ($q) {

            $q->on('vehicles.titular_type', '=',  'SiretCompany');
            $q->orOn('vehicles.titular_id','=', 'siret_companies.id');
        })->join('siret_companies', function ($q) {

            $q->on('siren_companies.id', '=', 'siret_companies.siren_company_id');
        })->where('siren_companies.id','=', $id);

10-07 13:57