Custom Product Type not using attributes

[bethmacknik]

I've created a custom product type in CE 2.1.1. The module is enabled and I can create new products for this type. But the attributes I've defined in InstallData.php are not being enabled. I'm not sure what I'm missing here.

<?php

namespace Merry\Sets\Setup;
 
use Magento\Catalog\Model\Product;
use Magento\Eav\Setup\EavSetup;
use Magento\Eav\Setup\EavSetupFactory;
use Magento\Framework\Setup\InstallDataInterface;
use Magento\Framework\Setup\ModuleContextInterface;
use Magento\Framework\Setup\ModuleDataSetupInterface;

class InstallData implements InstallDataInterface
{
    /**
     * EAV setup factory
     *
     * @var EavSetupFactory
     */
    protected $eavSetupFactory;
 
    /**
     * Init
     *
     * @param EavSetupFactory $eavSetupFactory
     */
    public function __construct(EavSetupFactory $eavSetupFactory)
    {
        $this->eavSetupFactory = $eavSetupFactory;
    }
 
    /**
     * {@inheritdoc}
     */
    public function install(ModuleDataSetupInterface $setup, ModuleContextInterface $context)
    {
        /** @var \Magento\Eav\Setup\EavSetup $eavSetup */
        $eavSetup = $this->eavSetupFactory->create(['setup' => $setup]);
        
        //associate these attributes with new product type
        $fieldList = [
            'price',
            'cost',
            'tier_price',
            'weight',
        ];
 
        // make these attributes applicable to new product type
        foreach ($fieldList as $field) {
            $applyTo = explode(
                ',',
                $eavSetup->getAttribute(\Magento\Catalog\Model\Product::ENTITY, $field, 'apply_to')
            );
            if (!in_array(\Merry\Sets\Model\Product\Type::TYPE_CODE, $applyTo)) {
                $applyTo[] = \Merry\Sets\Model\Product\Type::TYPE_CODE;
                $eavSetup->updateAttribute(
                    \Magento\Catalog\Model\Product::ENTITY,
                    $field,
                    'apply_to',
                    implode(',', $applyTo)
                );
            }
        }

    }
}