ACP2E-2376: avoid double calculation for configurable and child product while applying discount for configurable

Author: alzota

app/code/Magento/SalesRule/Model/Validator.php

@@ -479,13 +479,7 @@ public function initTotals($items, Address $address)
 
             /** @var Quote\Item $item */
             foreach ($items as $item) {
-                if ($item->getHasChildren()) {
-                    continue;
-                }
-                if (!$this->isValidItemForRule($item, $rule)
-                    || ($item->getChildren() && $item->isChildrenCalculated())
-                    || $item->getNoDiscount()
-                ) {
+                if (!$this->isValidItemForRule($item, $rule)) {
                     continue;
                 }
                 $qty = $this->validatorUtility->getItemQty($item, $rule);
@@ -517,6 +511,18 @@ public function initTotals($items, Address $address)
      */
     private function isValidItemForRule(AbstractItem $item, Rule $rule)
     {
+        if ($item->getParentItem() || $item->getParentItemId()) {
+            return false;
+        }
+
+        if (($item->getHasChildren() || $item->getChildren()) && $item->isChildrenCalculated()) {
+            return false;
+        }
+
+        if ($item->getNoDiscount()) {
+            return false;
+        }
+
         if (!$rule->getActions()->validate($item)) {
             return false;
         }