From f9a623d4edb2f09128f77cc0f0243c6d8acc4d2d Mon Sep 17 00:00:00 2001
From: Mark van Dijk <markvandijk@happyhorizon.com>
Date: Fri, 20 Sep 2024 14:13:45 +0200
Subject: [PATCH] Improve error handling generating multiple files

Give a useful error when the array was not present.
---
 .../Modules/GenerateFiles/Services/GenerateFileService.cs    | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/WiserTaskScheduler/WiserTaskScheduler/Modules/GenerateFiles/Services/GenerateFileService.cs b/WiserTaskScheduler/WiserTaskScheduler/Modules/GenerateFiles/Services/GenerateFileService.cs
index fbe94c2e..40b5275c 100644
--- a/WiserTaskScheduler/WiserTaskScheduler/Modules/GenerateFiles/Services/GenerateFileService.cs
+++ b/WiserTaskScheduler/WiserTaskScheduler/Modules/GenerateFiles/Services/GenerateFileService.cs
@@ -85,6 +85,11 @@ public async Task<JObject> Execute(ActionModel action, JObject resultSets, strin
 
             var rows = ResultSetHelper.GetCorrectObject<JArray>(generateFile.UseResultSet, ReplacementHelper.EmptyRows, resultSets);
 
+            if (rows == null)
+            {
+                throw new ResultSetException($"Failed to find an array at key '{generateFile.UseResultSet}' in result sets to loop over for generating multiple files.");
+            }
+            
             var indexRows = new List<int> { 0 };
             for (var i = 0; i < rows.Count; i++)
             {