render() must be compatible with Magento\Backend\Block\Widget\Grid\Column\Renderer\RendererInterface::render(Magento\Framework\DataObject $row)

Question

Fatal error: Declaration of \ModuleName\Block\Adminhtml\ModuleName\Grid\Renderer\Image::render() must be compatible with Magento\Backend\Block\Widget\Grid\Column\Renderer\RendererInterface::render(Magento\Framework\DataObject $row) in C:\wamp\www\magento2\app\code\\ModuleName\Block\Adminhtml\ModuleName\Grid\Renderer\Image.php on line 59

<?php
namespace <vendor-name>\ModuleName\Block\Adminhtml\ModuleName\Grid\Renderer;
use Magento\Backend\Block\Widget\Grid\Column\Renderer\AbstractRenderer;
use Magento\Framework\Object;
use Magento\Store\Model\StoreManagerInterface;
class Image extends AbstractRenderer
{
 private $_storeManager;
 /**
 * @param \Magento\Backend\Block\Context $context
 * @param array $data
 */
 public function __construct(\Magento\Backend\Block\Context $context, StoreManagerInterface $storemanager, array $data = [])
 {
 $this->_storeManager = $storemanager;
 parent::__construct($context, $data);
 $this->_authorization = $context->getAuthorization();
 echo "test";
 }
 /**
 * Renders grid column
 *
 * @param Object $row
 * @return string
 */
 public function render(Object $row)
 {
 $mediaDirectory = $this->_storeManager->getStore()->getBaseUrl(
 \Magento\Framework\UrlInterface::URL_TYPE_MEDIA
 );
 $imageUrl = $mediaDirectory.'/FolderPathName'.$this->_getValue($row);
 return '<img src="'.$imageUrl.'" width="50"/>';
 }
}

• Fabian Blechschmidt: PHP expects, that the method signature is the same for a child class.

Answer 1

As stated by Fabian in the comment your child class method signature is different from the parent class.

The parent method from AbstractRenderer is

public function render(DataObject $row)
{
 if ($this->getColumn()->getEditable()) {
 $result = '<div class="admin__grid-control">';
 $result .= $this->getColumn()->getEditOnly() ? ''
 : '<span class="admin__grid-control-value">' . $this->_getValue($row) . '</span>';
 return $result . $this->_getInputValueElement($row) . '</div>' ;
 }
 return $this->_getValue($row);
}

Do you notice the difference with your method?

Your method parameters is Object $row where it should be Magento\Framework\DataObject $row.

• Marius: Additional info. Magento\Framework\Object does not exist anymore. it was turned to Magento\Framework\DataObject to make Magento2 compatible with php7
• Paras Arora: I am using php 5.6 but still facing the same issue