ACP2E-651: Orders Api zero row total issue for order items with discounts

Author: Anna Bukatar

app/code/Magento/Sales/Model/Order/Webapi/ChangeOutputArray.php

@@ -49,15 +49,31 @@ public function execute(
         OrderItemInterface $dataObject,
         array $result
     ): array {
-        $result[OrderItemInterface::ROW_TOTAL] = $this->priceRenderer->getTotalAmount($dataObject);
-        $result[OrderItemInterface::BASE_ROW_TOTAL] = $this->priceRenderer->getBaseTotalAmount($dataObject);
-        $result[OrderItemInterface::ROW_TOTAL_INCL_TAX] = $this->defaultRenderer->getTotalAmount($dataObject);
-        $result[OrderItemInterface::BASE_ROW_TOTAL_INCL_TAX] = $dataObject->getBaseRowTotal()
+        $result[OrderItemInterface::ROW_TOTAL] = $this->round($this->priceRenderer->getTotalAmount($dataObject));
+        $result[OrderItemInterface::BASE_ROW_TOTAL] = $this->round(
+            $this->priceRenderer->getBaseTotalAmount($dataObject)
+        );
+        $result[OrderItemInterface::ROW_TOTAL_INCL_TAX] = $this->round(
+            $this->defaultRenderer->getTotalAmount($dataObject)
+        );
+        $result[OrderItemInterface::BASE_ROW_TOTAL_INCL_TAX] = $this->round($dataObject->getBaseRowTotal()
             + $dataObject->getBaseTaxAmount()
             + $dataObject->getBaseDiscountTaxCompensationAmount()
             + $dataObject->getBaseWeeeTaxAppliedAmount()
-            - $dataObject->getBaseDiscountAmount();
+            - $dataObject->getBaseDiscountAmount()
+        );
 
         return $result;
     }
+
+    /**
+     * Remove negative values from row totals
+     *
+     * @param float $value
+     * @return mixed
+     */
+    private function round(float $value)
+    {
+        return max($value, 0);
+    }
 }