Update source into github

app/Models/Menu.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Kalnoy\Nestedset\NodeTrait;
+
+class Menu extends Model
+{
+    use HasFactory, NodeTrait;
+
+
+    protected $fillable = [
+        'title',
+        'slug',
+        'route_name',
+        'icon',
+        'sort_by',
+        'is_active',
+        'parent_id',
+    ];
+
+    /**
+     * Get the parent menu of this menu.
+     */
+    public function parent(): BelongsTo
+    {
+        return $this->belongsTo(Menu::class, 'parent_id');
+    }
+
+    /**
+     * Get the child menus of this menu.
+     */
+    public function children(): HasMany
+    {
+        return $this->hasMany(Menu::class, 'parent_id');
+    }
+}