From 6ddcd71c26f75f0d792315b833bce7b34fc2ba14 Mon Sep 17 00:00:00 2001
From: Sipke Schoorstra <sipkeschoorstra@outlook.com>
Date: Wed, 20 Aug 2025 10:50:56 +0200
Subject: [PATCH] Exclude blacklisted types (`string`, `object`, `Array`,
 `DateTime`) from workflow variable registration logic. (#6857)

---
 .../Handlers/ConfigureEngineWithVariableTypes.cs     | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/modules/Elsa.JavaScript/Handlers/ConfigureEngineWithVariableTypes.cs b/src/modules/Elsa.JavaScript/Handlers/ConfigureEngineWithVariableTypes.cs
index b458522f0..dbbf0bbdb 100644
--- a/src/modules/Elsa.JavaScript/Handlers/ConfigureEngineWithVariableTypes.cs
+++ b/src/modules/Elsa.JavaScript/Handlers/ConfigureEngineWithVariableTypes.cs
@@ -11,12 +11,22 @@ namespace Elsa.JavaScript.Handlers;
 public class ConfigureEngineWithWorkflowVariableTypes(IOptions<ManagementOptions> options) 
     : INotificationHandler<EvaluatingJavaScript>
 {
+    // Blacklist of types to exclude from registration.
+    private static readonly Type[] BlacklistedTypes =
+    [
+        typeof(string),
+        typeof(object),
+        typeof(Array),
+        typeof(DateTime)
+        // Add more types if needed.
+    ];
+
     /// <inheritdoc />
     public Task HandleAsync(EvaluatingJavaScript notification, CancellationToken cancellationToken)
     {
         var engine = notification.Engine;
         var variableTypes = options.Value.VariableDescriptors
-            .Where(x => x.Type is { ContainsGenericParameters: false} && x.Type != typeof(object))
+            .Where(x => x.Type is { ContainsGenericParameters: false } && !BlacklistedTypes.Contains(x.Type) && !x.Type.IsPrimitive)
             .Select(x => x.Type)
             .ToArray();