MC-35717: Admin can not add a Product with a Customizable Option (File) to Order by SKU

Author: SmVladyslav

app/code/Magento/Catalog/view/adminhtml/web/catalog/product/composite/configure.js

@@ -617,12 +617,14 @@ define([
              * @param blockItem
              */
             var _renameFields = function (method, blockItem, listType) {
-                var pattern         = null;
-                var patternFlat     = null;
-                var replacement     = null;
-                var replacementFlat = null;
-                var scopeArr        = blockItem.id.match(/.*\[\w+\]\[([^\]]+)\]$/);
-                var itemId          = scopeArr[1];
+                var pattern           = null;
+                var patternFlat       = null;
+                var patternPrefix     = RegExp('\\s', 'g');
+                var replacement       = null;
+                var replacementFlat   = null;
+                var replacementPrefix = '_';
+                var scopeArr          = blockItem.id.match(/.*\[\w+\]\[([^\]]+)\]$/);
+                var itemId            = scopeArr[1];
 
                 if (method == 'current_confirmed_to_form') {
                     pattern         = RegExp('(\\w+)(\\[?)');
@@ -652,12 +654,15 @@ define([
                 var rename = function (elms) {
                     for (var i = 0; i < elms.length; i++) {
                         if (elms[i].name && elms[i].type == 'file') {
-                            elms[i].name = elms[i].name.replace(patternFlat, replacementFlat);
+                            var prefixName = 'options[files_prefix]',
+                                prefixValue = 'item_' + itemId + '_';
+
                             self.blockFormFields.insert(new Element('input', {
                                 type: 'hidden',
-                                name: 'options[files_prefix]'.replace(pattern, replacement),
-                                value: 'item_' + itemId + '_'
+                                name: prefixName.replace(pattern, replacement),
+                                value: prefixValue.replace(patternPrefix, replacementPrefix)
                             }));
+                            elms[i].name = elms[i].name.replace(patternFlat, replacementFlat);
                         } else if (elms[i].name) {
                             elms[i].name = elms[i].name.replace(pattern, replacement);
                         }