Magento 2: Installed product attribute with options is immutable

Question

My extension I'm working on requires a couple of product attributes to function so I added them to the install scripts. One of the attributes is a select attribute and I thought it'd be a good idea to pre-populate some starting options. Unfortunately doing this seems to make the attribute options immutable and I need to be able to add and remove these options at a later date like you would with a normal select attribute.

The part of the install script in question is this:

if (version_compare($context->getVersion(), '0.0.5') < 0) {
    $eavSetup = $this->eavSetupFactory->create(['setup' => $setup]);

    $eavSetup->removeAttribute(
        \Magento\Catalog\Model\Product::ENTITY,
        'google_shopping_taxonomy'
    );

    $eavSetup->addAttribute(
        \Magento\Catalog\Model\Product::ENTITY,
        'google_shopping_taxonomy',
        [
            'type' => 'int',
            'backend' => 'Magento\Eav\Model\Entity\Attribute\Backend\ArrayBackend',
            'frontend' => '',
            'label' => 'Google Shopping Taxonomy',
            'input' => 'select',
            'class' => 'select',
            'source' => 'Tainted\Googleshopping\Model\Entity\Attribute\Source\Taxonomy',
            'global' => \Magento\Eav\Model\Entity\Attribute\ScopedAttributeInterface::SCOPE_STORE,
            'visible' => true,
            'required' => false,
            'user_defined' => true,
            'default' => '',
            'searchable' => false,
            'filterable' => false,
            'comparable' => false,
            'visible_on_front' => false,
            'used_in_product_listing' => false,
            'unique' => false,
            'apply_to' => ''
        ]
    );
};

And the Taxonomy it references in the source looks like this:

namespace Tainted\Googleshopping\Model\Entity\Attribute\Source;

use Magento\Eav\Model\Entity\Attribute\Source\AbstractSource;

class Taxonomy extends AbstractSource
{
    public function getAllOptions()
    {
        return [
            '0' => [
                'label' => 'Furniture > Outdoor Furniture > Outdoor Furniture Sets',
                'value' => '0'
            ],
            '1' => [
                'label' => 'Home & Garden > Kitchen & Dining > Kitchen Appliances > Outdoor Grills',
                'value' => '1'
            ]
        ];
    }
}

Is there a way to modify the install script so that it does use the default options but also allows additional options to be added to the attribute in future?

Answer 1

Try adding your attribute like this:

$eavSetup->addAttribute(
    \Magento\Catalog\Model\Product::ENTITY,
    'google_shopping_taxonomy',
    [
        'type' => 'int',
        'backend' => 'Magento\Eav\Model\Entity\Attribute\Backend\ArrayBackend',
        'frontend' => '',
        'label' => 'Google Shopping Taxonomy',
        'input' => 'select',
        'class' => 'select',
        'source' => '\Magento\Eav\Model\Entity\Attribute\Source\Table'
        'global' => \Magento\Eav\Model\Entity\Attribute\ScopedAttributeInterface::SCOPE_STORE,
        'visible' => true,
        'required' => false,
        'user_defined' => true,
        'default' => '',
        'searchable' => false,
        'filterable' => false,
        'comparable' => false,
        'visible_on_front' => false,
        'used_in_product_listing' => false,
        'unique' => false,
        'apply_to' => '',
        'option'     => array (
            'values' => array(
                0 => 'Furniture > Outdoor Furniture > Outdoor Furniture Sets',
                1 => 'Home & Garden > Kitchen & Dining > Kitchen Appliances > Outdoor Grills',
            )
         ),
    ]
);

Notice I removed the source