Ttdfjt

I am adding a custom field to product attributes with a plugin providing the adminhtml display.

I have it visible in Store -> Attributes -> Product -> Edit attribute and it works okay to save, but when editing a product attribute the stored value is not loaded. The value is initially correctly stored in the database, subsequent visits to edit do not load the saved value from the database.

How can I have this yesno successfully pull the stored value when an admin is editing the attribute? I'm not sure why the value isn't being pulled with the current one being selected. This is Magento 2.2.7

CompanyNameModuleNameSetupUpgradeSchema.php

<?php
namespace CompanyNameModuleNameSetup;
use MagentoFrameworkSetupUpgradeSchemaInterface;
use MagentoFrameworkSetupModuleContextInterface;
use MagentoFrameworkSetupSchemaSetupInterface;
class UpgradeSchema implements UpgradeSchemaInterface
 public function upgrade(SchemaSetupInterface $setup, ModuleContextInterface $context)
 if (version_compare($context->getVersion(), '1.0.1') < 0) 
 $setup->startSetup();
 $setup->getConnection()->addColumn(
 $setup->getTable('catalog_eav_attribute'),
 'my_custom_field',
 ['type' => MagentoFrameworkDBDdlTable::TYPE_SMALLINT,
 'length' => '1',
 'nullable' => false,
 'unsigned' => true,
 'default' => '0',
 'comment' => 'This is a custom field']);
 $setup->endSetup();
 

CompanyNameModuleNamePluginBlockAdminhtmlProductAttributeEditTabFront.php

<?php
namespace CompanyNameModuleNamePluginBlockAdminhtmlProductAttributeEditTab;

class Front


 /**
 * @var Yesno
 */
 protected $_yesNo;

 /**
 * @param MagentoConfigModelConfigSourceYesno $yesNo
 */
 public function __construct(
 MagentoConfigModelConfigSourceYesno $yesNo
 ) 
 $this->_yesNo = $yesNo;
 

 /**
 * Get form HTML
 *
 * @return string
 */
 public function aroundGetFormHtml(
 MagentoCatalogBlockAdminhtmlProductAttributeEditTabFront $subject,
 Closure $proceed
 )
 

 $yesnoSource = $this->_yesNo->toOptionArray();
 $form = $subject->getForm();
 $fieldset = $form->getElement('front_fieldset');
 $fieldset->addField(
 'my_custom_field',
 'select',
 [
 'name' => 'my_custom_field',
 'label' => __('Label for my custom field'),
 'title' => __('Title for my custom field'),
 'note' => __('Note for my custom field.'),
 'values' => $yesnoSource,
 ]
 );
 return $proceed();
 

CompanyName/ModuleName/etc/adminhtml/di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
 <type name="MagentoCatalogBlockAdminhtmlProductAttributeEditTabFront">
 <plugin name="companyname_attribute_edit_form" type="CompanyNameModuleNamePluginBlockAdminhtmlProductAttributeEditTabFront" sortOrder="1"/>
 </type>
</config>

If you need to select yes/no value show at selected at edit time than just change the file code of

CompanyNameModuleNamePluginBlockAdminhtmlProductAttributeEditTabFront.php

<?php
namespace CompanyNameModuleNamePluginBlockAdminhtmlProductAttributeEditTab;


use MagentoBackendBlockTemplateContext;
use MagentoBackendBlockWidgetForm;
use MagentoBackendBlockWidgetFormGeneric;
use MagentoConfigModelConfigSourceYesno;
use MagentoCatalogModelEntityAttribute;
use MagentoEavBlockAdminhtmlAttributePropertyLocker;
use MagentoFrameworkDataFormFactory;
use MagentoFrameworkRegistry;

class Front extends Generic

 /**
 * @var Yesno
 */
 protected $_yesNo;

 /**
 * @param MagentoConfigModelConfigSourceYesno $yesNo
 */
 public function __construct(
 Context $context,
 Registry $registry,
 FormFactory $formFactory,
 Yesno $yesNo,
 PropertyLocker $propertyLocker,
 array $data = []
 ) 
 $this->_yesNo = $yesNo;
 $this->propertyLocker = $propertyLocker;
 parent::__construct($context, $registry, $formFactory, $data);
 


 public function aroundGetFormHtml(
 MagentoCatalogBlockAdminhtmlProductAttributeEditTabFront $subject,
 Closure $proceed
 ) 
 $attributeObject = $this->_coreRegistry->registry('entity_attribute');
 //Your plugin code
 $yesnoSource = $this->_yesNo->toOptionArray();
 $form = $subject->getForm();
 $fieldset = $form->getElement('front_fieldset');


 $fieldset->addField(
 'my_custom_field',
 'select',
 [
 'name' => 'my_custom_field',
 'label' => __('Label for my custom field'),
 'title' => __('Title for my custom field'),
 'note' => __('Note for my custom field.'),
 'values' => $yesnoSource,
 ]
 );
 $this->_eventManager->dispatch(
 'adminhtml_catalog_product_attribute_edit_frontend_prepare_form',
 ['form' => $form, 'attribute' => $attributeObject]
 );

 $this->setForm($form);
 $form->setValues($attributeObject->getData());
 $this->propertyLocker->lock($form);

 return $proceed();
 

if helpful than please give upvote.
Thanks