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 [];
 }
}

• Tangentially Perpendicular: You'll probably do better asking on magento.stackexchange.com
• miken32: 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.

Answer 1

You can use :

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

• Cihangir Yaman: 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.