Question

我有三种型号：车辆：

+--------------------+------------------+------+-----+---------------------+----------------+
| 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                |                |
+--------------------+------------------+------+-----+---------------------+----------------+

SiretCompanies：

+------------------+------------------+------+-----+---------------------+----------------+
| 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                |                |
+------------------+------------------+------+-----+---------------------+----------------+

SirenCompany：

+---------------------+------------------+------+-----+---------------------+----------------+
| 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相关联。我想要的是获得SirenCompany的所有相关车辆。

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一个Eloquent查询运行，但我似乎无法弄明白。

如果我只考虑名义，我就有这个：

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();

但我似乎无法弄清楚如何编写连接以使其对应于上述查询。

Answer 1

这就是我提出的

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);

使用雄辩的复杂联接

1 个答案: