Interceptor Plugin for Product Attributes

Question

I'm trying to modify the "short_description" attribute using a plugin but I can't seem to get it to work across the whole website. I can do this on the product view page with the following but I don't know how to do this globally across the whole website.

I've been trying to create a plugin on "getAttributes" but nothing I try wants to work.

../app/code/TM/Customplugin/etc/di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Catalog\Block\Product\View">
        <plugin name="tm-block-plugin" type="TM\Customplugin\Plugin\GetProductPlugin" sortOrder="2" />
    </type>
</config>

../app/code/TM/Customplugin/Plugin/GetProductPlugin.php

<?php
    namespace TM\Customplugin\Plugin;
    class GetProductPlugin
    {    
        public function afterGetProduct(\Magento\Catalog\Block\Product\View $subject, $result)
        {
            $result['short_description'] = strtolower($result['short_description']);
            return $result;
        }
    }

UPDATE

This product attribute is being called through the helper class

$_helper->productAttribute($_product, $_product->getShortDescription(), 'short_description').

Using print_r(get_class_methods($_helper)) I get this:

Array ( [0] => __construct [1] => addHandler [2] => getHandlers [3] => process [4] => productAttribute [5] => categoryAttribute [6] => isDirectivesExists [7] => isModuleOutputEnabled )

Does anyone know if I need to create a plugin to intercept the productAttribute from the helper or is there another way?

SOLUTION

I ended up getting this to work using the preference class rewrite method and not the Plugin method. I know this isn't ideal but it works. If anyone knows how to achieve the same result using a Plugin please share :)

/app/code/TM/Module1/etc/di.xml

 <?xml version="1.0"?>
    <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">    
        <preference for="Magento\Catalog\Model\Product" type="TM\Module1\Model\Catalog\Product" />
    </config>

/app/code/TM/Module1/Model/Catalog/Product.php

<?php
namespace TM\Module1\Model\Catalog;
class Product extends \Magento\Catalog\Model\Product
{    
    public function getShortDescription()
    {        
        return strtolower($this['short_description']);
    }
}
?>

Answer 1

The plugin you are using is only valid for product detail page.

You can do it by adding plugin on class Magento\Catalog\Model\Product with method afterGetShortDescription().

Hope this helps you.

Answer 2

1) Create this file in app/code/Solwin/Module1/etc/di.xml

<?xml version="1.0"?>
    <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
        <type name="Magento\Catalog\Model\Product">
            <plugin name="sl-block-plugin" type="Solwin\Module1\Plugin\GetShortDescPlugin"/>
        </type>
    </config>

2) Create this file in app/code/Solwin/Module1/Plugin/GetShortDescPlugin.php

<?php
namespace Solwin\Module1\Plugin;
class GetShortDescPlugin
{
   public function afterGetShortDescription(Magento\Catalog\Model\Product $subject, $result)
   {
       $result['short_description'] = strtolower($result['short_description']);
            return $result;
    }  
}
?>