How to create M2 module which filters by custom product attribute?

Question

Experimenting with Magento EE 2.1.7 and creating modules. I've created an attribute by the name of "brand" and have assigned a few products with brand data so that I can filter them by brand name/value.

I've created the boilerplate M2 module code and can confirm it's registered and loading. I'm attempting to extend \Magento\Catalog\Model\Layer so here is the code and file I'm modifying:

File: app/code/MyCompany/MyModule/Model/Magento/Catalog/Layer.php

Code:

<?php

namespace MyCompany\MyModule\Model\Magento\Catalog;


class Layer extends \Magento\Catalog\Model\Layer {

    public function afterGetProductCollection($subject, $collection)
    {
        $collection->addAttributeToFilter('brand', array('eq' => 'Ryobi'));

        return $collection;
    }

}

With the above code I'm attempting to filter my custom product attribute "brand" with the value "Ryobi". Is this the correct approach for customer product attributes?

Answer 1

You need to take not a Brand name, but it's id. Also it's called 'manufacturer'. Do something like this:

$collection->addAttributeToFilter('manufacturer', array('eq' => 1));