laravel eloquent models one to many relationship with dingo transformer - laravel

Question

my codes are constructed by Laravel+dingo.
I have two models which are one to many relationship:
Reservation.php (Master)
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
class Reservation extends Model
{
protected $table = 'dbo.Reservation';
public function hasManyReservationDetails()
{
return $this->hasMany('App\Models\ReservationDetail', 'ReservationID', 'ReservationID');
}
}
ReservationDetail.php (Detail)
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
class ReservationDetail extends Model
{
protected $table = 'dbo.ReservationDetail';
public function belongsToReservation()
{
return $this->belongsTo('App\Models\Reservation', 'ReservationID', 'ReservationDetailID');
}
}
And two Transformers for the two models as following:
ReservationTransformer
public function transform(Reservation $reservation)
{
return [
'reservation_id' => (int) $reservation->ReservationID,
'reservation_no' => $reservation->ReservationNo,
];
}
ReservationDetail Transformer
public function transform(ReservationDetail $reservation_detail)
{
return [
'reservation_detail_id' => (int) $reservation_detail->ReservationDetailID,
'reservation_id' => (int) $reservation_detail->ReservationID,
'room_no' => $reservation_detail->RoomNo,
];
}
My controller and inquire
$reservation = Reservation::where('ReservationNo', '=', $reservation_no)
->with('ReservationDetails')
->get();
return $reservation;
I get the following return
{
"Reservations": [
{
"ReservationID": "1",
"ReservationNo": "2016-06-01 16:50:59.0659",
"reservation_details": [
{
"ReservationDetailID": "1",
"ReservationID": "1",
"RoomNo": "001",
},
{
"ReservationDetailID": "2",
"ReservationID": "1",
"RoomNo": "002",
}
]
}
]
}
I try the following but only return the translation of master table.
$reservation = $this->collection($reservation, new ReservationTransformer());
**
How can I transform the the data of master and detail table together?
**
I am not really understand how 'Custom Transformation Layer' works, anyone who can give me an example?
Many Thanks.

Answer 1

You can use fractals build in support for transformer includes. See http://fractal.thephpleague.com/transformers/
I would start by renaming public function hasManyReservationDetails() to public function reservationDetails().
And then your ReservationTransformer will take care of the rest:
use League\Fractal\TransformerAbstract;
class ReservationTransformer extends TransformerAbstract
{
/**
* List of resources to automatically include
*
* #var array
*/
protected $defaultIncludes = [
'reservationDetails',
];
public function transform(Reservation $reservation)
{
return [
'reservation_id' => (int) $reservation->ReservationID,
'reservation_no' => $reservation->ReservationNo,
];
}
/**
* Include ReservationDetail
*
* #param Reservation $reservation
*
* #return League\Fractal\Resource\Collection
*/
public function includeReservationDetails(Reservation $reservation)
{
return $this->collection($reservation->reservationDetails, new ReservationDetailTransformer);
}
}