Laravel Eloquent Join Using Another table - sql

Question

Hi how to convert this SQL query to Laravel Eloquent?
I have three table: payments, devices and users.
Payments table does not store user_id. but table has device_id. And device table also has user_id.
I want to get user name which made payment.
select * from payments p
join devices d on p.device_id = d.devid
join users u on d.user_id = u.id

Answer 1

it's very easy
$users = \DB::table('payments')
->join('devices', 'devices.id', '=', 'payments.device_id')
->join('users', 'users.id', '=', 'devices.user_id')
->select('payments.*', 'users.name')
->get();
Another way is:
We have three models:
User (has many devices)
Device(belongs to user && has many payments)
Payment (belongs to device)
1) User.php
<?php
namespace App;
use Illuminate\Contracts\Auth\MustVerifyEmail;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Notifications\Notifiable;
class User extends Authenticatable
{
use Notifiable;
public function devices()
{
return $this->hasMany(Device::class);
}
2) Device
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Device extends Model
{
//
public function user()
{
return $this->belongsTo(User::class);
}
public function payments()
{
return $this->hasMany(Payment::class);
}
}
3)Payment
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Payment extends Model
{
//
public function device()
{
return $this->belongsTo(Device::class);
}
}
and your query should be:
Payament::with(['device','device.user'])->get();