Laravel Relationship not working with belongsTo - laravel

Question

Hello Guys, I am just passing my query to notification blade, but its gave error. I dont know what i did wrong with bellow code. If you guys fix this issue i will be very glad. Thanks in advance
Notification seen model
<?php
namespace App\Models\Backend;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
class notificationseen extends Model
{
use HasFactory;
protected $table = 'notificationseens';
public function Notification()
{
return $this->belongsTo(Notification::class, 'notificationID');
}
}
Notification Model
<?php
namespace App\Models\Backend;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
class Notification extends Model
{
use HasFactory;
protected $table = 'notifications';
public function notificationseen()
{
return $this->belongsTo(notificationseen::class, 'notificationID');
}
}
View Blade
#foreach( $notification as $notify )
#if($notify->Notification->seen == 0)
<!-- Single Notification --><a href="{{ route('singlenotify', $notify->id) }}" id="notifysee" data-id="{{ $notify->id }}">
<div class="alert unread custom-alert-3 alert-primary" role="alert"><i class="bi bi-bell mt-0"></i>
<div class="alert-text w-75">
<h6 class="text-truncate">{{ $notify->name }}</h6><span class="text-truncate">{{ $notify->description }}</span>
</div>
</div></a>
#else
<!-- Single Notification --><a href="{{ route('singlenotify', $notify->id) }}">
<div class="alert custom-alert-3 alert-primary" role="alert"><i class="bi bi-bell mt-0"></i>
<div class="alert-text w-75">
<h6 class="text-truncate">{{ $notify->name }}</h6><span class="text-truncate">{{ $notify->description }}</span>
</div>
</div></a>
#endif
#endforeach
Table structure
$table->increments('id');
$table->integer('userid');
$table->integer('notificationID');
$table->integer('seen')->default('0')->comment("0 for unseen 1 for seen");
$table->timestamps();
Can you please help me out. I cant see any issue but its me error "Attempt to read property "seen" on null"

Answer 1

Ok, some things:
I would use belongsTo in the notificationseen class unless one notificationseen could have more than one Notifications to belong to ;)
Do a Notification have more than one notificationseen references? I do not think so, so in your Notification change the reference to hasOne.
In your blade, use #if($notify->notificationseen->seen == 0) or you call better "Notification::with('notificationseen')->get()" in your controller and then pass it to your view.

Answer 2

You can try to add an isset to avoid the error :
#if(isset($notify->Notification->seen) && $notify->Notification->seen == 0)
(...)
#else
(...)
#endif
EDIT : in your code, you defined 2 belongsTo methods, but according to the official Laravel documentation, you must define a hasOne method and the inverse of it, the belongsTo method.