Exception in Magento2 during MassDelete action - php

Question

I have exception when I selected some records in grid and trying to delete them. Here is that exception:
1 exception(s): Exception #0 (InvalidArgumentException):
Amiddio\News\Model\News does not extend \Magento\Framework\DataObject
Magento version is 2.1.8
app\code\Amiddio\News\view\adminhtml\ui_component\news_grid_listing.xml
<argument name="data" xsi:type="array">
<item name="config" xsi:type="array">
<item name="sticky" xsi:type="boolean">true</item>
</item>
</argument>
<massaction name="listing_massaction">
<action name="delete">
<argument name="data" xsi:type="array">
<item name="config" xsi:type="array">
<item name="type" xsi:type="string">delete</item>
<item name="label" xsi:type="string" translate="true">Delete</item>
<item name="url" xsi:type="url" path="news/actions/massDelete"/>
<item name="confirm" xsi:type="array">
<item name="title" xsi:type="string" translate="true">Delete items</item>
<item name="message" xsi:type="string" translate="true">Are you sure you want to delete selected items?</item>
</item>
</item>
</argument>
</action>
</massaction>
app\code\Amiddio\News\etc\di.xml
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
<type name="Magento\Framework\View\Element\UiComponent\DataProvider\CollectionFactory">
<arguments>
<argument name="collections" xsi:type="array">
<item name="news_grid_listing_data_source" xsi:type="string">Amiddio\News\Model\ResourceModel\News\Grid\Collection</item>
</argument>
</arguments>
</type>
</config>
app\code\Amiddio\News\Model\News.php
namespace Amiddio\News\Model;
use Magento\Framework\Model\AbstractModel;
class News extends AbstractModel
{
protected function _construct()
{
$this->_init('Amiddio\News\Model\ResourceModel\News');
}
}
app\code\Amiddio\News\Model\ResourceModel\News.php
namespace Amiddio\News\Model\ResourceModel;
use Magento\Framework\Model\ResourceModel\Db\AbstractDb;
class News extends AbstractDb
{
protected function _construct()
{
$this->_init('amiddio_news', 'news_id');
}
}
app\code\Amiddio\News\Model\ResourceModel\News\Collection.php
namespace Amiddio\News\Model\ResourceModel\News;
class Collection extends \Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection
{
protected function _construct()
{
$this->_init(' Amiddio\News\Model\News', 'Amiddio\News\Model\ResourceModel\News');
}
}
app\code\Amiddio\News\Model\ResourceModel\News\Grid\Collection.php
namespace Amiddio\News\Model\ResourceModel\News\Grid;
use Amiddio\News\Model\ResourceModel\News\Collection as GridCollection;
use Magento\Framework\Search\AggregationInterface;
use Magento\Framework\Api\Search\SearchResultInterface;
use Magento\Framework\View\Element\UiComponent\DataProvider\Document;
use Amiddio\News\Model\ResourceModel\News;
use Magento\Framework\Api\SearchCriteriaInterface;
class Collection extends GridCollection implements SearchResultInterface
{
protected $aggregations;
protected function _construct()
{
$this->_init(Document::class, News::class);
}
public function getAggregations()
{
return $this->aggregations;
}
public function setAggregations($aggregations)
{
$this->aggregations = $aggregations;
}
public function getAllIds($limit = null, $offset = null)
{
return $this->getConnection()->fetchCol($this->_getAllIdsSelect($limit, $offset), $this->_bindParams);
}
public function getSearchCriteria()
{
return null;
}
public function setSearchCriteria(SearchCriteriaInterface $searchCriteria = null)
{
return $this;
}
public function getTotalCount()
{
return $this->getSize();
}
public function setTotalCount($totalCount)
{
return $this;
}
public function setItems(array $items = null)
{
return $this;
}
}
app\code\Amiddio\News\Controller\Adminhtml\Actions\MassDelete.php
namespace Amiddio\News\Controller\Adminhtml\Actions;
use Magento\Framework\Controller\ResultFactory;
use Magento\Backend\App\Action\Context;
use Magento\Ui\Component\MassAction\Filter;
use Amiddio\News\Model\ResourceModel\News\CollectionFactory;
/**
* Class MassDelete
*/
class MassDelete extends \Magento\Backend\App\Action
{
/**
* #var Filter
*/
protected $filter;
/**
* #var CollectionFactory
*/
protected $collectionFactory;
/**
* #param Context $context
* #param Filter $filter
* #param CollectionFactory $collectionFactory
*/
public function __construct(Context $context, Filter $filter, CollectionFactory $collectionFactory)
{
$this->filter = $filter;
$this->collectionFactory = $collectionFactory;
parent::__construct($context);
}
/**
* Execute action
*
* #return \Magento\Backend\Model\View\Result\Redirect
* #throws \Magento\Framework\Exception\LocalizedException|\Exception
*/
public function execute()
{
$collection = $this->filter->getCollection($this->collectionFactory->create());
$collectionSize = $collection->getSize();
foreach ($collection as $page) {
$page->delete();
}
$this->messageManager->addSuccess(__('A total of %1 record(s) have been deleted.', $collectionSize));
/** #var \Magento\Backend\Model\View\Result\Redirect $resultRedirect */
$resultRedirect = $this->resultFactory->create(ResultFactory::TYPE_REDIRECT);
return $resultRedirect->setPath('news/index/');
}
}
I'm beginner in Magento 2, and I'm trying to resolve this issue some days already. Maybe someone had that problem and he/she knows solution?!
Thanks very much for any help!

Answer 1

In your News model (app\code\Amiddio\News\Model\News.php), your class should implement IdentityInterface.
change:
class News extends AbstractDb{ ...
to:
use Magento\Framework\DataObject\IdentityInterface;
class News extends AbstractDb implements IdentityInterface{ ....

Answer 2

I found the bug im my code.
In the file '...ResourceModel\News\Collection.php' I have space before 'Amiddio\News\Model\News'.
The problem solved.