Magento – How to call helper function observer in magento2

event-observerhelpermagento2

I am trying to call helper function on observer custom module in Magento2 but Unable to call helper in observer.

Please help me if anybody have this solution. I am waiting for all your positive response.

Best Answer

Try something like below in your observer file.

<?php

namespace Custom\Module\Observer;

use Magento\Framework\Event\ObserverInterface;

class SalableObserver implements ObserverInterface
{
    ...

    protected $dataHelper;

    ...

    public function __construct(
        ...
        \Custom\Module\Helper\Data $dataHelper
        ...
    ) {
        ...
        $this->dataHelper = $dataHelper;
        ...
    }

    public function ...(){
        $helper = $this->dataHelper;
    }

    ...
}

?>

Related Solutions

Magento – Magento 2 : How to call helper function on override block

You can call helper function by define helper class into construct method of class,

You can declare your helper classs in construct method like this,

 \Vendor\Mymodule\Helper\Data $dataHelper

And

 $this->dataHelper = $dataHelper;

Now you can call any functio of Data.php helper function like this,

$this->dataHelper->getFunction() and your function is working.

namespace Vendor\Module_Name\Block\Product;
 class ListProduct extends \Magento\Catalog\Block\Product\ListProduct
 {
 public function __construct(
        \Magento\Catalog\Block\Product\Context $context,        
        \Magento\Framework\Data\Helper\PostHelper $postDataHelper,
        \Magento\Catalog\Model\Layer\Resolver $layerResolver,
        \Magento\Catalog\Api\CategoryRepositoryInterface $categoryRepository,
        \Magento\Framework\Url\Helper\Data $urlHelper,
        \Vendor\Mymodule\Helper\Data $dataHelper,
        array $data = []
    ) {
        $this->dataHelper = $dataHelper;       
        parent::__construct(
            $context,
            $postDataHelper,
            $layerResolver,
            $categoryRepository,
            $urlHelper,
            $data
        );
    }

   public function test(){
        $this->dataHelper->getHelperFunction();
   }
}

Remove var folder and check

Magento – Magento 2 : How to call helper function on override product list block

you can call your helper function as per below,

 namespace Vendor\Module_Name\Block\Product;
     class ListProduct extends \Magento\Catalog\Block\Product\ListProduct
     {
           public function __construct(
            \Magento\Catalog\Block\Product\Context $context,        
            \Magento\Framework\Data\Helper\PostHelper $postDataHelper,
            \Magento\Catalog\Model\Layer\Resolver $layerResolver,
            \Magento\Catalog\Api\CategoryRepositoryInterface $categoryRepository,
            \Magento\Framework\Url\Helper\Data $urlHelper,
            \Vendor\Mymodule\Helper\Data $dataHelper,
            array $data = []
        ) {
            $this->dataHelper = $dataHelper;       
            parent::__construct(
                $context,
                $postDataHelper,
                $layerResolver,
                $categoryRepository,
                $urlHelper,
                $data
            );
        }

       public function test(){
            $this->dataHelper->getHelperFunction();
       }
    }

Remove var folder and refresh again.

Best Answer

Related Solutions

Magento – Magento 2 : How to call helper function on override block

Magento – Magento 2 : How to call helper function on override product list block

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