Model class not found in .../magento/framework/ObjectManager/Factory/AbstractFactory.php:93

Question

When I try to load collection via getCollection method in my custom Block, I get this error in apache2 log.

The complete error is:

[Mon May 08 09:53:53.485661 2017] [proxy_fcgi:error] [pid 1996:tid 140084720269056] [client 127.0.0.1:50323] AH01071: Got error 'PHP message:
PHP Fatal error: Uncaught Error: Class 'Ciptaloka\\HelloWorld\\Model\\HelloWorld' not found in /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:93
Stack trace:
#0 /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/ObjectManager/Factory/Compiled.php(88): Magento\\Framework\\ObjectManager\\Factory\\AbstractFactory->createObject('Ciptaloka\\Hello...', Array)
#1 /opt/bitnami/apps/magento/htdocs/vendor/magento/framework/ObjectManager/ObjectManager.php(57): Magento\\Framework\\ObjectManager\\Factory\\Compiled->create('Ciptaloka\\Hello...', Array)
#2 /opt/bitnami/apps/magento/htdocs/var/generation/Ciptaloka/HelloWorld/Model/HelloWorldFactory.php(43): Magento\\Framework\\ObjectManager\\ObjectManager->create('Ciptaloka\\Hello...', Array)
#3 /opt/bitnami/apps/magento/htdocs/app/code/Ciptaloka/HelloWorld/Block/Catalog/Product/HelloWorld.php(75): Ciptaloka\\HelloWorld\\Model\\HelloWorldFactory->create()
#4 [internal function]: Ciptaloka\\HelloWorld\\Block\\Catalog\\P...
', referer: http://192.168.1.171/

This is the directory structure of my custom module:

app/code/Ciptaloka/HelloWorld/
├── Block
│  └── Catalog
│  └── Product
│  └── HelloWorld.php
├── etc
│  ├── adminhtml
│  │  ├── routes.xml
│  │  └── system.xml
│  ├── config.xml
│  └── module.xml
├── Helper
│  └── ConfigurationHelper.php
├── Model
│  ├── HelloWorld.php
│  ├── ResourceModel
│  │  ├── HelloWorld
│  │  │  └── Collection.php
│  │  └── HelloWorld.php
│  └── Source
│  └── TextAlign.php
├── registration.php
├── Setup
│  └── InstallSchema.php
└── view
 └── frontend
 ├── layout
 │  └── catalog_product_view.xml
 ├── templates
 │  └── product
 │  └── hello.phtml
 └── web
 └── css
 └── hello.css

As you can see in the dir tree, Ciptaloka\HelloWorld\Model\HelloWorld does exist. And this is the file content of it:

<?php
namespace Ciptloka\HelloWorld\Model;
use \Magento\Framework\Model\AbstractModel;
class HelloWorld extends AbstractModel
{
 /**
 * Model constructor
 */
 protected function _construct()
 {
 $this->_init('Ciptaloka\HelloWorld\Model\ResourceModel\HelloWorld');
 }
}

And the other files;

Model/ResourceModel/HelloWorld.php (The table ciptaloka_helloworld is defined.):

<?php
namespace Ciptaloka\HelloWorld\Model\ResourceModel;
use \Magento\Framework\Model\ResourceModel\Db\AbstractDb;
class HelloWorld extends AbstractDb
{
 /**
 * Model initialization
 */
 protected function _construct()
 {
 $this->_init('ciptaloka_helloworld', 'id');
 }
}

Model/ResourceModel/HelloWorld/Collection.php:

<?php
namespace Ciptaloka\HelloWorld\Model\ResourceModel\HelloWorld;
use \Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection;
class Collection extends AbstractCollection
{
 /**
 * Collection constructor
 */
 protected function _construct()
 {
 $this->_init(
 'Ciptaloka\HelloWorld\Model\HelloWorld',
 'Ciptaloka\HelloWorld\Model\ResourceModel\HelloWorld'
 );
 }
}

the generated factory var/generation/Ciptaloka/HelloWorld/Model/HelloWorldFactory.php:

<?php
namespace Ciptaloka\HelloWorld\Model;
class HelloWorldFactory
{
 protected $_objectManager = null;
 protected $_instanceName = null;
 public function __construct(\Magento\Framework\ObjectManagerInterface $objectManager, $instanceName = 'Ciptaloka\\HelloWorld\\Model\\HelloWorld')
 {
 $this->_objectManager = $objectManager;
 $this->_instanceName = $instanceName;
 }
 public function create(array $data = array())
 {
 return $this->_objectManager->create($this->_instanceName, $data);
 }
}

and, the Block file:

<?php
namespace Ciptaloka\HelloWorld\Block\Catalog\Product;
use \Magento\Framework\View\Element\Template;
use \Magento\Framework\View\Element\Template\Context;
use \Ciptaloka\HelloWorld\Helper\ConfigurationHelper;
use \Ciptaloka\HelloWorld\Model\HelloWorldFactory;
class HelloWorld extends Template
{
 /**
 * @var ConfigurationHelper
 */
 protected $_helper;
 /**
 * @var HelloWorldFactory
 */
 protected $_helloWorldFactory;
 public function __construct(
 Context $context,
 HelloWorldFactory $helloWorldFactory,
 array $data = [],
 ConfigurationHelper $helper
 ) {
 parent::__construct($context, $data);
 $this->_helloWorldFactory = $helloWorldFactory;
 $this->_helper = $helper;
 }
 /**
 * Returns 'Hello World!' string
 *
 * @return \Magento\Framework\Phrase
 */
 public function getHelloWorldTxt()
 {
 return __('Hello World!');
 }
 public function getBlockLabel()
 {
 return $this->_helper->getBlockLabel();
 }
 public function getTextAlign()
 {
 return $this->_helper->getTextAlign();
 }
 protected function _toHtml()
 {
 if ($this->_helper->getEnable()) {
 return parent::_toHtml();
 }
 else {
 return '';
 }
 }
 public function getCollection()
 {
 return $this->_helloWorldFactory->create()->getCollection();
 }
}

Do I make any mistake here that caused that error? Any help would be appreciated.

• Jackson: Replace class HelloWorld extends AbstractDb with class HelloWorld extends \Magento\Framework\Model\AbstractModel
• Rizki Pratama: @AnkitShah replacing the one in Model/ResourceModel/HelloWorld.php? Is that the same as the one inherited in Model file?
• Jackson: Sorry ignore it. Please follow mageplaza.com/magento-2-module-development
• Sohel Rana: Did you try after delete var/generation/* and clear cache?
• Rizki Pratama: @AnkitShah I tried creating model interface and implementing abstract methods based on the link you provided, but it still give me the same error as stated in my question.

Answer 1

You have typo in your app/code/Ciptaloka/HelloWorld/Model/HelloWorld.php at line 3:

namespace Ciptloka\HelloWorld\Model;

It should be:

namespace Ciptaloka\HelloWorld\Model;

Notice the difference between Ciptloka and Ciptaloka.

• Rizki Pratama: Wow... how could my eyes miss that?! Thanks for spotting it! Everything works flawlessly now.