Class Demo\Helloworld\Controller\Post\index\Interceptor does not exist

Question

I am trying to get data from a database table, my code of Index.php

<?php
namespace Demo\Helloworld\Controller\Post;
class Index extends \Magento\Framework\App\Action\Action
{
    protected $_postFactory;
    public function __construct(
        \Magento\Framework\App\Action\Context $context,
        \Magento\Framework\View\Result\PageFactory $pageFactory,
        \Pixelpro\Helloworld\Model\PostFactory $postFactory
        )
    {
        $this->_pageFactory = $pageFactory;
        $this->_postFactory = $postFactory;
        return parent::__construct($context);
    }
    public function execute()
    {
        
        $post = $this->_postFactory->create();
        $collection = $post->getCollection();
        foreach($collection as $item){
            echo "<pre>";
            print_r($item->getData());
            echo "</pre>";
        }
        
        
    }
}

I tried to run these commands but the error still appears

php bin/magento setup:upgrade
php bin/magento setup:static-content:deploy -f
php bin/magento cache:flush

the error :

1 exception(s): Exception #0 (ReflectionException): Class Demo\Helloworld\Controller\Post\index\Interceptor does not exist Exception #0 (ReflectionException): Class Demo\Helloworld\Controller\Post\index\Interceptor does not exist#1 Magento\Framework\Code\Reader\ClassReader->getConstructor() called at [vendor/magento/framework/ObjectManager/Definition/Runtime.php:54]

Answer 1

just remove generated folder and hit below cmd. make sure your controller name is correct Index.php.

rm -rf generated/* var/*;
php bin/magento cache:flush
php bin/magento setup:upgrade
php bin/magento setup:di:compile