One to many resource relationship returns empty - laravel

Question

I'm trying to return a relationship using Laravels API resource classes. Each order has many order totals.
My orders model
namespace App;
use Illuminate\Database\Eloquent\Model;
class Orders extends Model
{
protected $table = 'zen_orders';
public function ordersTotals() {
return $this->hasMany(OrdersTotalsModel::class, 'orders_id');
}
}
My orders resource
namespace App\Http\Resources;
use Illuminate\Http\Resources\Json\Resource;
class OrdersResource extends Resource
{
/**
* Transform the resource into an array.
*
* #param \Illuminate\Http\Request $request
* #return array
*/
public function toArray($request)
{
return [
'id' => $this->orders_id,
'customername' => $this->customers_name,
'paymentmethod' => $this->payment_method,
'datePurchased' => $this->date_purchased,
'status' => $this->orders_status,
'currency' => $this->currency,
'orderTotal' => $this->order_total,
'ordersTotals' => new OrdersTotalsResource($this->id),
];
}
}
My orders total model
namespace App;
use Illuminate\Database\Eloquent\Model;
class OrdersTotalsModel extends Model
{
protected $table = 'zen_orders_total';
protected $primaryKey = 'orders_total_id';
public function ordersTotals() {
return $this->belongsTo(Orders::class, 'orders_id');
}
}
My orders total resource
namespace App\Http\Resources;
use Illuminate\Http\Resources\Json\ResourceCollection;
class OrdersTotalsResource extends ResourceCollection
{
/**
* Transform the resource into an array.
*
* #param \Illuminate\Http\Request $request
* #return array
*/
public function toArray($request)
{
return [
'id' => $this->id,
'type' => $this->title,
'amount' => $this->value,
];
}
}
I'm currently getting this error with the code provided:
Symfony\Component\Debug\Exception\FatalThrowableError: Call to a member function toBase() on null in file
Previous to this error I would just get this:
{
"id": 389331,
"customername": "John Smith",
"paymentmethod": "Credit/Debit Card",
"datePurchased": "2017-01-01 00:11:28",
"status": 3,
"currency": "GBP",
"orderTotal": "36.99",
"ordersTotals": []
},
I've followed the documentation as best I can and tried all the possible methods demonstrated there, I believe the orders total model isn't being called as any changes I make to the model and resource don't make a difference.

Answer 1

My approach was wrong, for future visitors I was trying to retrieve records from a relationship using a resource.
On the Orders Resource I added:
'ordersTotals' => OrdersTotalsResource::collection(
OrdersTotalsModel::where('orders_id', '=' , $this->orders_id)
->orderBy('sort_order')
->get()
),
I was querying the model wrong, and had my primary keys mixed up.
I used this debug method to help diagnose where I was going wrong.
namespace App\Providers;
use Illuminate\Support\ServiceProvider;
use Illuminate\Support\Facades\App;
use Illuminate\Support\Facades\Event;
use Illuminate\Support\Facades\Log;
class AppServiceProvider extends ServiceProvider
{
/**
* Bootstrap any application services.
*
* #return void
*/
public function boot()
{
//
}
/**
* Register any application services.
*
* #return void
*/
public function register()
{
if (env('APP_DEBUG') == true) {
Event::listen('Illuminate\Database\Events\QueryExecuted', function ($query) {
Log::debug($query->sql . ' - ' . serialize($query->bindings));
});
}
}
}
This would then log the query into the /storage/logs/laravel.log file