ENGCOM-4234: [Backport] Solved swagger response of product attribute option is_default #21164

Author: sidolov

app/code/Magento/Directory/Model/ResourceModel/Country/Collection.php

@@ -328,7 +328,7 @@ private function addDefaultCountryToOptions(array &$options)
 
         foreach ($options as $key => $option) {
             if (isset($defaultCountry[$option['value']])) {
-                $options[$key]['is_default'] = $defaultCountry[$option['value']];
+                $options[$key]['is_default'] = !empty($defaultCountry[$option['value']]);
             }
         }
     }

app/code/Magento/Ui/view/base/web/js/form/element/country.js

@@ -49,7 +49,7 @@ define([
 
             if (!this.value()) {
                 defaultCountry = _.filter(result, function (item) {
-                    return item['is_default'] && item['is_default'].includes(value);
+                    return item['is_default'] && _.contains(item['is_default'], value);
                 });
 
                 if (defaultCountry.length) {