2

I want override a block class, for this I have made entry in di.xml using preference and created a respective file on my custom module block/Rewrite/Product/ListProduct. My file is calling but now here apart from modify other functions I also need to modify __construct() function of base class. But I don't know how to do it 

namespace Mageplaza\HelloWorld\Block\Rewrite\Product;
//use Magento\Catalog\Block\Product\Context;
use Magento\Catalog\Api\CategoryRepositoryInterface;
use Magento\Catalog\Block\Product\ProductList\Toolbar;
use Magento\Catalog\Model\Category;
use Magento\Catalog\Model\Config;
use Magento\Catalog\Model\Layer;
use Magento\Catalog\Model\Layer\Resolver;
use Magento\Catalog\Model\Product;
use Magento\Catalog\Model\ResourceModel\Product\Collection;
use Magento\Catalog\Pricing\Price\FinalPrice;
use Magento\Eav\Model\Entity\Collection\AbstractCollection;
use Magento\Framework\App\ActionInterface;
use Magento\Framework\App\Config\Element;
use Magento\Framework\Data\Helper\PostHelper;
use Magento\Framework\DataObject\IdentityInterface;
use Magento\Framework\Exception\NoSuchEntityException;
use Magento\Framework\Pricing\Render;
use Magento\Framework\Url\Helper\Data;
use Magento\Framework\App\Request\Http;
 class ListProduct extends \Magento\Catalog\Block\Product\ListProduct
 {
 protected $_defaultToolbarBlock = Toolbar::class;
 /**
 * Product Collection
 *
 * @var AbstractCollection
 */
 protected $_productCollection;
 /**
 * Catalog layer
 *
 * @var Layer
 */
 protected $_catalogLayer;
 /**
 * @var PostHelper
 */
 protected $_postDataHelper;
 /**
 * @var Data
 */
 protected $urlHelper;
 protected $request;
 /**
 * @var CategoryRepositoryInterface
 */
 protected $categoryRepository;
 // public function __construct(
 // \Magento\Catalog\Block\Product\Context $context,
 // PostHelper $postDataHelper,
 // Resolver $layerResolver,
 // CategoryRepositoryInterface $categoryRepository,
 // Data $urlHelper,
 // Http $request,
 // array $data = []
 // ) {
 // $this->_catalogLayer = $layerResolver->get();
 // $this->_postDataHelper = $postDataHelper;
 // $this->categoryRepository = $categoryRepository;
 // $this->urlHelper = $urlHelper;
 // parent::__construct(
 // $context,$postDataHelper,$layerResolver,$categoryRepository,$urlHelper,$request,$data);
 // }
 public function initializeProductCollection(){
 echo "stringjhhj";
 echo $categoryId = $this->request->getParam('myselection'); // all params
 $layer = $this->getLayer();
 /* @var $layer Layer */
 if ($this->getShowRootCategory()) {
 $this->setCategoryId($this->_storeManager->getStore()->getRootCategoryId());
 }
 // if this is a product view page
 if ($this->_coreRegistry->registry('product')) {
 // get collection of categories this product is associated with
 $categories = $this->_coreRegistry->registry('product')
 ->getCategoryCollection()->setPage(1, 1)
 ->load();
 // if the product is associated with any category
 if ($categories->count()) {
 // show products from this category
 $this->setCategoryId(current($categories->getIterator())->getId());
 }
 }
 $origCategory = null;
 if ($this->getCategoryId()) {
 try {
 $category = $this->categoryRepository->get($this->getCategoryId());
 var_dump( $category);die;
 } catch (NoSuchEntityException $e) {
 echo $category = null;
 }
 if ($category) {
 $origCategory = $layer->getCurrentCategory();
 $layer->setCurrentCategory($category);
 }
 }
 $collection = $layer->getProductCollection();
 var_dump($collection->getData());
 $this->prepareSortableFieldsByCategory($layer->getCurrentCategory());
 if ($origCategory) {
 $layer->setCurrentCategory($origCategory);
 }
 //$this->addToolbarBlock($collection);
 $this->_eventManager->dispatch(
 'catalog_block_product_list_collection',
 ['collection' => $collection]
 );
 return $collection;
 }
 public function _getProductCollection(){
 // make changes here means call MyinitializeProductCollection in place of initializeProductCollection
 if ($this->_productCollection === null) {
 $this->_productCollection = $this->initializeProductCollection();
 }
 return $this->_productCollection;
 }
 public function getLoadedProductCollection(){
 // make changes here means call _MygetProductCollection in place of _getProductCollection
 // die("jhsjf");
 return $this->_getProductCollection();
 }
}

di.xml

Update :

Error :

Fatal error: Uncaught TypeError: Argument 1 passed to Mageplaza\HelloWorld\Block\Rewrite\Product\ListProduct::__construct() must be an instance of Mageplaza\HelloWorld\Block\Rewrite\Product\Context, instance of Magento\Catalog\Block\Product\Context given, called in /var/www/html/trainees/pooja_new/Magento22/generated/code/Mageplaza/HelloWorld/Block/Rewrite/Product/ListProduct/Interceptor.php on line 14 and defined in /var/www/html/trainees/pooja_new/Magento22/app/code/Mageplaza/HelloWorld/Block/Rewrite/Product/ListProduct.php:55 Stack trace: #0 /var/www/html/trainees/pooja_new/Magento22/generated/code/Mageplaza/HelloWorld/Block/Rewrite/Product/ListProduct/Interceptor.php(14): Mageplaza\HelloWorld\Block\Rewrite\Product\ListProduct->__construct(Object(Magento\Catalog\Block\Product\Context), Object(Magento\Framework\Data\Helper\PostHelper), Object(Magento\Catalog\Model\Layer\Resolver), Object(Magento\Catalog\Model\CategoryRepository), Object(Magento\Framework\Url\Helper\Data), Array) #1 /var/www/html/trainees/pooja_new/Magen in /var/www/html/trainees/pooja_new/Magento22/app/code/Mageplaza/HelloWorld/Block/Rewrite/Product/ListProduct.php on line 55

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asked Dec 27, 2018 at 10:42
5
  • Can you update the error to your question? Also post the di.xml as well. Commented Dec 27, 2018 at 11:34
  • Fatal error: Uncaught TypeError: Argument 1 passed to Mageplaza\HelloWorld\Block\Rewrite\Product\ListProduct::__construct() must be an instance of Mageplaza\HelloWorld\Block\Rewrite\Product\Context, instance of Magento\Catalog\Block\Product\Context given, called in /var/www/html/trainees/pooja_new/Magento22/generated/code/Mageplaza/HelloWorld/Block/Rewrite/Product/ListProduct/Interceptor.php on line 14 and defined in /var/www/html/trainees/pooja_new/Magento22/app/code/Mageplaza/HelloWorld/Block/Rewrite/Product/ListProduct.php:55 Stack trace: Commented Dec 27, 2018 at 12:56
  • di.xml <preference for="Magento\Catalog\Block\Product\ListProduct" type="Mageplaza\HelloWorld\Block\Rewrite\Product\ListProduct"/> Commented Dec 27, 2018 at 12:57
  • Try to compile : php bin/magento setup:di:compile Commented Dec 27, 2018 at 13:03
  • i did but nothing happend Commented Dec 28, 2018 at 7:53

1 Answer 1

1

You can try the following code:

namespace Mageplaza\HelloWorld\Block\Rewrite\Product;
use Magento\Catalog\Api\CategoryRepositoryInterface;
use Magento\Catalog\Block\Product\ProductList\Toolbar;
use Magento\Catalog\Model\Category;
use Magento\Catalog\Model\Config;
use Magento\Catalog\Model\Layer;
use Magento\Catalog\Model\Layer\Resolver;
use Magento\Catalog\Model\Product;
use Magento\Catalog\Model\ResourceModel\Product\Collection;
use Magento\Catalog\Pricing\Price\FinalPrice;
use Magento\Eav\Model\Entity\Collection\AbstractCollection;
use Magento\Framework\App\ActionInterface;
use Magento\Framework\App\Config\Element;
use Magento\Framework\Data\Helper\PostHelper;
use Magento\Framework\DataObject\IdentityInterface;
use Magento\Framework\Exception\NoSuchEntityException;
use Magento\Framework\Pricing\Render;
use Magento\Framework\Url\Helper\Data;
use Magento\Framework\App\Request\Http;
class ListProduct extends \Magento\Catalog\Block\Product\ListProduct
 {
 protected $_defaultToolbarBlock = Toolbar::class;
 /**
 * Product Collection
 *
 * @var AbstractCollection
 */
 protected $_productCollection;
 /**
 * Catalog layer
 *
 * @var Layer
 */
 protected $_catalogLayer;
 /**
 * @var PostHelper
 */
 protected $_postDataHelper;
 /**
 * @var Data
 */
 protected $urlHelper;
 protected $request;
 /**
 * @var CategoryRepositoryInterface
 */
 protected $categoryRepository;
 public function __construct(
 \Magento\Catalog\Block\Product\Context $context,
 PostHelper $postDataHelper,
 Resolver $layerResolver,
 CategoryRepositoryInterface $categoryRepository,
 Data $urlHelper,
 Http $request,
 array $data = []
 ) {
 $this->_catalogLayer = $layerResolver->get();
 $this->_postDataHelper = $postDataHelper;
 $this->categoryRepository = $categoryRepository;
 $this->urlHelper = $urlHelper;
 parent::__construct($context,$postDataHelper,$layerResolver,$categoryRepository,$urlHelper,$data);
 }
 public function initializeProductCollection(){
 echo "stringjhhj";
 echo $categoryId = $this->request->getParam('myselection'); // all params
 $layer = $this->getLayer();
 /* @var $layer Layer */
 if ($this->getShowRootCategory()) {
 $this->setCategoryId($this->_storeManager->getStore()->getRootCategoryId());
 }
 // if this is a product view page
 if ($this->_coreRegistry->registry('product')) {
 // get collection of categories this product is associated with
 $categories = $this->_coreRegistry->registry('product')
 ->getCategoryCollection()->setPage(1, 1)
 ->load();
 // if the product is associated with any category
 if ($categories->count()) {
 // show products from this category
 $this->setCategoryId(current($categories->getIterator())->getId());
 }
 }
 $origCategory = null;
 if ($this->getCategoryId()) {
 try {
 $category = $this->categoryRepository->get($this->getCategoryId());
 var_dump( $category);die;
 } catch (NoSuchEntityException $e) {
 echo $category = null;
 }
 if ($category) {
 $origCategory = $layer->getCurrentCategory();
 $layer->setCurrentCategory($category);
 }
 }
 $collection = $layer->getProductCollection();
 var_dump($collection->getData());
 $this->prepareSortableFieldsByCategory($layer->getCurrentCategory());
 if ($origCategory) {
 $layer->setCurrentCategory($origCategory);
 }
 //$this->addToolbarBlock($collection);
 $this->_eventManager->dispatch(
 'catalog_block_product_list_collection',
 ['collection' => $collection]
 );
 return $collection;
 }
 public function _getProductCollection(){
 // make changes here means call MyinitializeProductCollection in place of initializeProductCollection
 if ($this->_productCollection === null) {
 $this->_productCollection = $this->initializeProductCollection();
 }
 return $this->_productCollection;
 }
 public function getLoadedProductCollection(){
 // make changes here means call _MygetProductCollection in place of _getProductCollection
 // die("jhsjf");
 return $this->_getProductCollection();
 }
}

Finally run setup:upgrade, setup:di:compile and setup:static-content:deploy if needed and test.

answered Dec 27, 2018 at 13:18
5
  • [RuntimeException] Class Mageplaza\HelloWorld\Block\Rewrite\Product\Context does not exist Class Mageplaza\HelloWorld\Block\Rewrite\Product\ListProduct\Interceptor ge neration error: The requested class did not generate properly, because the 'generated' directory permission is read-only. If --- after running the 'bi n/magento setup:di:compile' Commented Dec 28, 2018 at 5:00
  • as i am giving the permission but still it is not taking and give this error ,even i deleted both var and generated folder but not working Commented Dec 28, 2018 at 5:01
  • Can you check my updated answer? Commented Dec 28, 2018 at 8:04
  • yes it is problem of context Commented Dec 28, 2018 at 8:18
  • Updated one not working? I have changed the context path? Commented Dec 28, 2018 at 8:19

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