From 36236706803ab9b70757eed98aa6e2ec44526596 Mon Sep 17 00:00:00 2001
From: Matthias Kuhn <matthias@opengis.ch>
Date: Thu, 28 Nov 2024 07:33:11 +0100
Subject: [PATCH] Avoid freeze when opening feature form with many relation
 widgets

---
 src/gui/qgsfeaturelistcombobox.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/gui/qgsfeaturelistcombobox.cpp b/src/gui/qgsfeaturelistcombobox.cpp
index 286c79bd0076..309e75f2e71c 100644
--- a/src/gui/qgsfeaturelistcombobox.cpp
+++ b/src/gui/qgsfeaturelistcombobox.cpp
@@ -288,9 +288,11 @@ void QgsFeatureListComboBox::setIdentifierValuesToNull()
 
 QgsFeatureRequest QgsFeatureListComboBox::currentFeatureRequest() const
 {
+  QgsFeatureRequest request;
+  request.setRequestMayBeNested( true );
   if ( mModel->extraIdentifierValues().isEmpty() )
   {
-    return QgsFeatureRequest().setFilterFids( QgsFeatureIds() ); // NULL: Return a request that's guaranteed to not return anything
+    request.setFilterFids( QgsFeatureIds() ); // NULL: Return a request that's guaranteed to not return anything
   }
   else
   {
@@ -309,8 +311,9 @@ QgsFeatureRequest QgsFeatureListComboBox::currentFeatureRequest() const
       }
     }
     const QString expression = filtersAttrs.join( QLatin1String( " AND " ) );
-    return QgsFeatureRequest().setFilterExpression( expression );
+    return request.setFilterExpression( expression );
   }
+  return request;
 }
 
 QString QgsFeatureListComboBox::filterExpression() const