slake-school-service/app/Models/Permission.php

<?php

namespace App\Models;

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

class Permission extends Model
{
    protected $fillable = [
        'code',
        'name',
        'type',
        'parent_id',
    ];

    protected $casts = [
        'type' => 'integer',
        'parent_id' => 'integer',
    ];

    public function roles(): BelongsToMany
    {
        return $this->belongsToMany(Role::class, 'role_permissions', 'permission_id', 'role_id');
    }
}