How to add custom dropdown attribute for category in Magento 2

How to add custom dropdown attribute for category in Magento 2

============================================================

/app/code/Wa/Categoryattrhome/registration.php

<?php 
\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'Wa_Categoryattrhome',
    __DIR__
);

===========================================================

/app/code/Wa/Categoryattrhome/composer.json


{
  "name": "wa/categoryattrhome",
  "description": "Create Custom Category Attribute",
  "require": {
    "php": "~5.5.0|~5.6.0",
    "magento/magento-composer-installer": "*"
  },
  "type": "magento2-module",
  "version": "1.0.0",
  "license": [
    "OSL-3.0",
    "AFL-3.0"
  ],
  "extra": {
    "map": [
      [
        "*",
        "Wa/categoryattrhome"
      ]
    ]
  }

}


==============================================

/app/code/Wa/Categoryattrhome/view/adminhtml/ui_component/category_form.xml


<?xml version="1.0" encoding="UTF-8"?>
<form xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd">
    <fieldset name="category_fields">
        <argument name="data" xsi:type="array">
            <item name="config" xsi:type="array">
                <item name="label" xsi:type="string" translate="true">Additional Settings</item>
                <item name="collapsible" xsi:type="boolean">true</item>
                <item name="sortOrder" xsi:type="number">100</item>
            </item>
        </argument>
        <field name="ishome_featured">
            <argument name="data" xsi:type="array">
            <item name="options" xsi:type="object">Magento\Eav\Model\Entity\Attribute\Source\Boolean</item>
                <item name="config" xsi:type="array">
                    <item name="sortOrder" xsi:type="number">60</item>
                    <item name="dataType" xsi:type="string">string</item>
                    <item name="formElement" xsi:type="string">select</item>
                    <item name="label" xsi:type="string" translate="true">Featured Category for home</item>
                </item>
            </argument>
        </field>
    </fieldset>
</form>

==================================================
/app/code/Wa/Categoryattrhome/Setup/UpgradeData.php

<?php
namespace Wa\Categoryattrhome\Setup;

use Magento\Eav\Setup\EavSetup;
use Magento\Eav\Setup\EavSetupFactory;
use Magento\Framework\Setup\UpgradeDataInterface;
use Magento\Framework\Setup\ModuleContextInterface;
use Magento\Framework\Setup\ModuleDataSetupInterface;

class UpgradeData implements UpgradeDataInterface
{
    private $eavSetupFactory;

    public function __construct(\Magento\Eav\Setup\EavSetupFactory $eavSetupFactory)
    {
            $this->eavSetupFactory = $eavSetupFactory;
    }

    public function upgrade(ModuleDataSetupInterface $setup, ModuleContextInterface $context)
    {
            $setup->startSetup();

            if (version_compare($context->getVersion(), '9.0.1', '<')) {
                $eavSetup = $this->eavSetupFactory->create(['setup' => $setup]);

                $eavSetup->addAttribute(
                \Magento\Catalog\Model\Category::ENTITY,
                'ishome_featured',
                [
                    'group' => 'General',
                    'type' => 'varchar',
                    'backend' => '',
                    'frontend' => '',
                    'label' => 'Featured Category for home',
                    'input' => 'select',
                    'class' => '',
                    'source' => 'Magento\Eav\Model\Entity\Attribute\Source\Boolean',
                    'global' => \Magento\Catalog\Model\ResourceModel\Eav\Attribute::SCOPE_GLOBAL,
                    'visible' => true,
                    'required' => true,
                    'user_defined' => false,
                    'default' => '',
                    'searchable' => false,
                    'filterable' => false,
                    'comparable' => false,
                    'visible_on_front' => false,
                    'used_in_product_listing' => true,
                    'unique' => false
                ]);
            }

            $setup->endSetup();
    }

}

==========================================================

/app/code/Wa/Categoryattrhome/etc/module.xml

<?xml version="1.0"?> 
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../lib/internal/Magento/Framework/Module/etc/module.xsd"> 
    <module name="Wa_Categoryattrhome" setup_version="1.0.0">
        <sequence>
            <module name="Magento_Catalog"/>
        </sequence>
    </module>
</config>


=====================================
* Copy the content of the repo to the Magento 2 root folder
* Run command: php bin/magento setup:upgrade
* Run Command: php bin/magento setup:static-content:deploy
* Now Flush Cache: php bin/magento cache:flush