fixes invalid relation in search form (#37137)

* fixes invalid relation in search form fixes #34410 * fetch the relation if only one is present
qgis · Jul 7, 2020 · 9eef5d7 · 9eef5d7
1 parent 961e6e8
commit 9eef5d7
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/gui/editorwidgets/qgsrelationreferencesearchwidgetwrapper.cpp b/src/gui/editorwidgets/qgsrelationreferencesearchwidgetwrapper.cpp
@@ -207,6 +207,9 @@ void QgsRelationReferenceSearchWidgetWrapper::initWidget( QWidget *editor )
   }
 
   QgsRelation relation = QgsProject::instance()->relationManager()->relation( config( QStringLiteral( "Relation" ) ).toString() );
+  // if no relation is given from the config, fetch one if there is only one available
+  if ( !relation.isValid() && !layer()->referencingRelations( mFieldIdx ).isEmpty() && layer()->referencingRelations( mFieldIdx ).count() == 1 )
+    relation = layer()->referencingRelations( mFieldIdx )[0];
   mWidget->setRelation( relation, false );
 
   mWidget->showIndeterminateState();