Magento 2 Plugin Not Extending Model - Finally Solved It

Question

I'm trying to use a plugin from the answer on this question

Add additional select attributes to grouped product's child collection

I would go back and ask the person who answered but I don't have a high enough reputation score yet to add comments.

I don't use composer, so have gone the old route of app/code.

My plugin looks like this

<?php
namespace mynamespace\Plugingrouped\Plugin;
use \Magento\Catalog\Model\ResourceModel\Product\Link\Product\Collection;
use \Magento\GroupedProduct\Model\Product\Type\Grouped as TypeGrouped;
class Grouped
{
public function afterGetAssociatedProductCollection(TypeGrouped $subject, Collection $result)
{
$result->addAttributeToSelect('my_attribute_weight');
$result->addAttributeToSelect('my_attribute_height');
return $result;
}
}
?>

I've added the plugin code as Grouped.php into a folder app/code/mynamespace/Plugingrouped/Plugin

My di.xml file in my module looks like this

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
<type name="Magento\GroupedProduct\Model\Product\Type">
    <plugin name="Grouped" type="Mynamespace\Plugingrouped\Plugin\Grouped" />
</type>

And then I tried calling a custom attribute in

app/design/frontend/Mynamespace/base/Magento_GroupedProduct/templates/product/view/type/grouped.html

<strong class="product-item-name"><?= $block->escapeHtml($_item->getName()) ?></strong>
                Weight : <?php echo $_item->getmy_attribute_height() ?>

To add custom attributes into the grouped product grid.

However, they don't render, I don't get an error, but I can't figure out how to make sure the plugin is working.

Answer 1

After many many days of banging my head on a wall, I've finally solved it.

I had two modules set up originally:

1. Mynamespace\Grouped\
2. Mynamespace\Plugingrouped

Nothing I did would make the plugin show up until I combined the two into module.

I now have the Model override and plugin in one module and it's working.

In case anyone else is having the same nightmare:

My di.xml looks like this

<?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\GroupedProduct\Model\Product\Type\Grouped" type="Mynamespace\Grouped\Model\Rewrite\Product\Type\Grouped" />
        <type name="Mynamespace\Grouped\Model\Rewrite\Product\Type\Grouped">
        <plugin name="Mynamespace_grouped_groupedproduct_model" type="Mynamespace\Grouped\Plugin\Grouped" />
        </type>
</config>

Folder Structure looks like:

Mynamespace
  ->Grouped
    ->etc (di.xml & module.xml)
    ->Model->Rewrite->Product->Type->Grouped.php (copy of core)
    ->Plugin->Grouped.php (containing plugin code)

On the frontend I've added the attributes into overriden copy of

app/design/frontend/Mynamespace/base/Magento_GroupedProduct/templates/product/view/type/grouped.html

and hey presto it worked.

A big thank you to those who replied and tried to help and I hope this answers helps others.

Now all I need to do is get them to show up in the cart and throughout checkout

:-)

Answer 2

Please try below

<type name="Magento\GroupedProduct\Model\Product\Type\Grouped">
    <plugin name="Grouped" type="Mynamespace\Plugingrouped\Plugin\Grouped" />
</type>