Magento getting array to string conversion error when trying to add custom attribute in customer module

Question

I'm new to Magento 2 and trying to add a customer attribute using a Data Patch.

I created the following patch class:

What I Tried:

Using addData(['used_in_forms' => ['adminhtml_customer']]).

Clearing cache and generated code.

Ensuring the attribute is not already in the database.

Converting the attribute to a Customer\Model\Attribute object.

<?php

namespace Vendor\Module\Setup\Patch\Data;

use Magento\Framework\Setup\Patch\DataPatchInterface;
use Magento\Customer\Setup\CustomerSetupFactory;
use Magento\Customer\Model\Customer;
use Magento\Eav\Model\Entity\Attribute\SetFactory as AttributeSetFactory;
use Magento\Framework\Setup\ModuleDataSetupInterface;

class CreateQuickbooksInvoiceAttribute implements DataPatchInterface
{
    /**
     * @var ModuleDataSetupInterface
     */
    private $moduleDataSetup;

    /**
     * @var CustomerSetupFactory
     */
    private $customerSetupFactory;

    /**
     * @var AttributeSetFactory
     */
    private $attributeSetFactory;

    /**
     * Constructor
     */
    public function __construct(
        ModuleDataSetupInterface $moduleDataSetup,
        CustomerSetupFactory $customerSetupFactory,
        AttributeSetFactory $attributeSetFactory
    ) {
        $this->moduleDataSetup     = $moduleDataSetup;
        $this->customerSetupFactory = $customerSetupFactory;
        $this->attributeSetFactory  = $attributeSetFactory;
    }

    /**
     * Apply patch
     */
    public function apply()
    {
        /** @var \Magento\Customer\Setup\CustomerSetup $customerSetup */
        $customerSetup = $this->customerSetupFactory->create(['setup' => $this->moduleDataSetup]);

        $customerEntity = $customerSetup->getEavConfig()->getEntityType(Customer::ENTITY);
        $attributeSetId = $customerEntity->getDefaultAttributeSetId();
        $attributeSet   = $this->attributeSetFactory->create();
        $attributeGroupId = $attributeSet->getDefaultGroupId($attributeSetId);

        if (!$customerSetup->getAttributeId(Customer::ENTITY, 'quickbooks_invoice')) {
            // Add attribute
            $customerSetup->addAttribute(Customer::ENTITY, 'quickbooks_invoice', [
                'type'         => 'int',
                'label'        => 'QuickBooks Invoice',
                'input'        => 'select',
                'source'       => \Magento\Eav\Model\Entity\Attribute\Source\Boolean::class,
                'required'     => false,
                'visible'      => true,
                'user_defined' => true,
                'system'       => 0,
                'position'     => 100,
                'sort_order'   => 100,
                'default'      => 0,
            ]);
        }

        // Load as customer attribute to safely assign used_in_forms
        /** @var \Magento\Customer\Model\Attribute $attribute */
        $attribute = \Magento\Framework\App\ObjectManager::getInstance()
            ->create(\Magento\Customer\Model\Attribute::class)
            ->loadByCode(Customer::ENTITY, 'quickbooks_invoice');

        $attribute->addData([
            'attribute_set_id'   => $attributeSetId,
            'attribute_group_id' => $attributeGroupId,
            'used_in_forms'      => ['adminhtml_customer'],
        ]);

        $attribute->save();
    }


    public static function getDependencies()
    {
        return [];
    }

    public function getAliases()
    {
        return [];
    }
}

You'll probably do better asking on magento.stackexchange.com — Tangentially Perpendicular
– Tangentially Perpendicular, Commented Sep 12 at 6:04
This question is similar to: PHP Notice: Array to string conversion Error. If you believe it’s different, please edit the question, make it clear how it’s different and/or how the answers on that question are not helpful for your problem. — miken32
– miken32, Commented Sep 15 at 22:32

Mickaël BAILLOT · Accepted Answer · 2025-09-15 08:13:26Z

-1

You can use :

$attribute->setData(
    'used_in_forms',
    ['adminhtml_customer']
);

answered Sep 15 at 8:13

Mickaël BAILLOT

1

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1 Comment

Cihangir Yaman Sep 15 at 9:20

Welcome to the community! Your answer looks helpful but If you could explain the causes of the problem and its solution in a little more detailed, the person asking the question could learn new information from you in the process.

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