sfp_api_laravel_serprati/app/Models/NotificationSend.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

class NotificationSend extends Model
{
    protected $guarded = ['id'];

    protected function casts(): array
    {
        return [
            'read'    => 'boolean',
            'read_at' => 'datetime',
        ];
    }

    public function notification(): BelongsTo
    {
        return $this->belongsTo(Notification::class);
    }

    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }
}