From b9070118842948e40c0759b34c68bcbd91c5e978 Mon Sep 17 00:00:00 2001
From: Lars Kaltefleiter <lars.kaltefleiter@itomig.de>
Date: Fri, 24 Apr 2026 11:28:06 +0200
Subject: [PATCH] :bug: Only offer states from classes with a lifecycle in
 AttributeClassState
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When enumerating allowed states in AttributeClassState::GetAllowedValues(),
child classes that have a state attribute but no lifecycle transitions
(stimuli) were included. TriggerOnStateChange only fires on actual
lifecycle state changes, so states from classes without a lifecycle
would never trigger — but were still offered in the UI.

Fix: skip child classes where MetaModel::HasLifecycle() returns false.
---
 sources/Core/AttributeDefinition/AttributeClassState.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sources/Core/AttributeDefinition/AttributeClassState.php b/sources/Core/AttributeDefinition/AttributeClassState.php
index 33971e74fe..24fd5f9a97 100644
--- a/sources/Core/AttributeDefinition/AttributeClassState.php
+++ b/sources/Core/AttributeDefinition/AttributeClassState.php
@@ -50,6 +50,9 @@ public function GetAllowedValues($aArgs = [], $sContains = '')
 
 			$aAllowedStates = [];
 			foreach (MetaModel::EnumChildClasses($sClass, ENUM_CHILD_CLASSES_ALL) as $sChildClass) {
+				if (!MetaModel::HasLifecycle($sChildClass)) {
+					continue;
+				}
 				$aValues = MetaModel::EnumStates($sChildClass);
 				foreach (array_keys($aValues) as $sState) {
 					$aAllowedStates[$sState] = $sState.' ('.MetaModel::GetStateLabel($sChildClass, $sState).')';