adds first comments

Author: riascho

packages/nodes-base/nodes/Transform/Summarize/Summarize.node.ts

@@ -345,6 +345,7 @@ export class Summarize implements INodeType {
 			return [[executionData]];
 		} else {
 			if (!fieldsToSplitBy.length) {
+				// [ria] if no fields to split by
 				const { pairedItems, ...json } = aggregationResult;
 				const executionData: INodeExecutionData = {
 					json,
@@ -354,7 +355,7 @@ export class Summarize implements INodeType {
 				};
 				return [[executionData]];
 			}
-			const returnData = aggregationToArray(aggregationResult, fieldsToSplitBy);
+			const returnData = aggregationToArray(aggregationResult, fieldsToSplitBy); // [ria] change here !!
 			const executionData = returnData.map((item) => {
 				const { pairedItems, ...json } = item;
 				return {

packages/nodes-base/nodes/Transform/Summarize/utils.ts

@@ -231,7 +231,7 @@ export function splitData(
 	const [firstSplitKey, ...restSplitKeys] = splitKeys;
 
 	const groupedData = data.reduce((acc, item) => {
-		let keyValuee = getValue(item, firstSplitKey) as string;
+		let keyValuee = getValue(item, firstSplitKey) as string; // [ria] is still a number
 
 		if (typeof keyValuee === 'object') {
 			keyValuee = JSON.stringify(keyValuee);
@@ -240,9 +240,9 @@ export function splitData(
 		if (options.skipEmptySplitFields && typeof keyValuee !== 'number' && !keyValuee) {
 			return acc;
 		}
-
+		// [ria] keyValuee is still number at this point
 		if (acc[keyValuee] === undefined) {
-			acc[keyValuee] = [item];
+			acc[keyValuee] = [item]; // [ria] becomes string here
 		} else {
 			(acc[keyValuee] as IDataObject[]).push(item);
 		}