Dynamic Multilevel Drop-down menu in Yii2 - 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

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;
}
}
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