Dynamic Multilevel Drop-down menu in Yii2

Question

I want to create a dynamic menu with my table (db). I have followed some instructions which are given below:

Table : "menupanal"

Step 01: I just create a super controller in app\components\Controller.php

Here is the code:

    namespace app\components;

use app\models\MenuPanal;

class Controller extends \yii\web\Controller
{

    public $menuItems = [];

    public function init(){

     $items = MenuPanal::find()
        ->where(['c_type'  => 'MENU'])
        ->orderBy('id')
        ->all();


     $menuItems = [];
     foreach ($items as $key => $value) {
                 $this->menuItems[] = 
                      ['label' => $value['c_name'], 
                          'items'=> [
                              ['label' => $value['c_redirect'], 'url' => ['#']],
                          ],
                      ];    
            }

  parent::init();
}

Step 02: Changed n main layout page:

        echo Nav::widget([
            'options' => ['class' => 'navbar-nav navbar-right'],

            'items' => Yii::$app->controller->menuItems,
        ]);

It is working in only one level. My question::

Question : how can I add multilevel menu using Super controller ?

I am new in Yii2. Helps are highly appreciated.

Answer 1

1. Create New MenuHelper in Component folder. There is no default component folder. Please create by yourself.

   <?php
   
   namespace app\components;
   
   use app\models\MenuPanel;
   use app\models\Zuser;
   use app\models\Vwrole;
   use app\assets\AppAsset;
   
   
   class MenuHelper
   {
   
       public static function getMenu()
       {
           $role_id = 1;
           $result = static::getMenuRecrusive($role_id);
           return $result;
       }
   
       private static function getMenuRecrusive($parent)
       {
   
           $items = MenuPanel::find()
               ->where(['c_parentid' => $parent])
               ->orderBy('c_sortord')
               ->asArray()
               ->all();
   
           $result = []; 
   
           foreach ($items as $item) {
               $result[] = [
                       'label' => $item['c_name'],
                       'url' => ['#'],
                       'items' => static::getMenuRecrusive($item['id']),
                       '<li class="divider"></li>',
                   ];
           }
           return $result;
       }
   
   }
   

2. in Main Layout Page put the following code

       echo Nav::widget([
           'options' => ['class' => 'navbar-nav navbar-right'],
           'items' => app\components\MenuHelper::getMenu(),
   

Enjoy Coding!!

Answer 2

You may use nested sets. Look at this extension for Yii: http://www.yiiframework.com/extension/nestedsetbehavior/ and its documentation. All you need to do is component with dynamic creation of menu items array for nested sets.

I found that there is a Yii2 extension version: http://www.yiiframework.com/extension/yii2-nestedsetbehavior/

Good luck

Answer 3

You may use this extension for multilevel dropdownMulti level Dropdown