ACP2E-863: Duplicate option ids can be included for multi-select attributes when bulk api is called

Author: Anna Bukatar

app/code/Magento/Eav/Model/Entity/Attribute/Backend/ArrayBackend.php

@@ -45,9 +45,9 @@ public function validate($object)
         if ($object->hasData($attributeCode)) {
             $data = $object->getData($attributeCode);
             if (is_array($data)) {
-                $object->setData($attributeCode, $this->filter($data));
+                $object->setData($attributeCode, $this->prepare($data));
             } elseif (is_string($data)) {
-                $object->setData($attributeCode, $this->filter(explode(',', $data)));
+                $object->setData($attributeCode, $this->prepare(explode(',', $data)));
             } elseif (empty($data)) {
                 $object->setData($attributeCode, null);
             }
@@ -57,13 +57,13 @@ public function validate($object)
     }
 
     /**
-     * Filter attribute values
+     * Prepare attribute values
      *
      * @param array $data
      * @return string
      */
-    public function filter(array $data): string
+    private function prepare(array $data): string
     {
-        return implode(',', array_filter(array_unique(($data))));
+        return implode(',', array_filter(array_unique($data), 'is_numeric'));
     }
 }

app/code/Magento/Eav/Test/Unit/Model/Entity/Attribute/Backend/ArrayBackendTest.php

@@ -78,6 +78,16 @@ public static function validateDataProvider(): array
                 false,
                 null,
             ],
+            [
+                ['sku' => 'test1', 'attr' => '13,13'],
+                true,
+                '13'
+            ],
+            [
+                ['sku' => 'test1', 'attr' => '0,1,2,3,4'],
+                true,
+                '0,1,2,3,4'
+            ]
         ];
     }