Complex join using eloquent - php

Question

I have three models:
Vehicles:
+--------------------+------------------+------+-----+---------------------+----------------+
| 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 | |
+---------------------+------------------+------+-----+---------------------+----------------+
A vehicle can be related to the SirenCompany either through a titular, or a renter. What I want is to get all related vehicles for a SirenCompany.
In raw MySQL, this is my query:
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
Now what I would like to do is run that as an Eloquent query, but I cannot seem to figure it out.
If I only consider the titular, I have this:
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();
But I cannot seem to figure out how to write the join so that it corresponds to the above query.

Answer 1

This is what I've come up with
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);