From 3c6740874f11eb926dfbebd9942925e002def3a9 Mon Sep 17 00:00:00 2001
From: Nyall Dawson <nyall.dawson@gmail.com>
Date: Fri, 31 Jan 2025 12:06:10 +1000
Subject: [PATCH] [sensorthings] Don't allow expansion back to base entity type

Avoids circular expansion

Fixes #59722
---
 src/gui/providers/sensorthings/qgssensorthingssourcewidget.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/gui/providers/sensorthings/qgssensorthingssourcewidget.cpp b/src/gui/providers/sensorthings/qgssensorthingssourcewidget.cpp
index 0438dde67ebf..0b818da61e2e 100644
--- a/src/gui/providers/sensorthings/qgssensorthingssourcewidget.cpp
+++ b/src/gui/providers/sensorthings/qgssensorthingssourcewidget.cpp
@@ -774,6 +774,7 @@ QWidget *QgsSensorThingsExpansionsDelegate::createEditor( QWidget *parent, const
                                                                    : index.model()->data( index.model()->index( index.row() - 1, 0 ), Qt::EditRole ).value<Qgis::SensorThingsEntity>();
 
       QList<Qgis::SensorThingsEntity> compatibleEntities = QgsSensorThingsUtils::expandableTargets( entityType );
+      compatibleEntities.removeAll( mBaseEntityType );
       // remove all entities which are already part of the expansion in previous rows -- we don't support "circular" expansion
       for ( int row = index.row() - 1; row >= 0; row-- )
       {