Limit the initial feature request sent by expression builder widget

Should help avoid short delays in opening the expression widget on slower layers (such as with the Postgres provider where features are fetched in a minimum batch of 2000 by default)
qgis · May 8, 2017 · cd248c6 · cd248c6 · NathanW2 · May 9, 2017
1 parent 9a19a5f
commit cd248c6
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/gui/qgsexpressionbuilderwidget.cpp b/src/gui/qgsexpressionbuilderwidget.cpp
@@ -548,7 +548,7 @@ void QgsExpressionBuilderWidget::on_txtExpressionString_textChanged()
     {
       // no feature passed yet, try to get from layer
       QgsFeature f;
-      mLayer->getFeatures().nextFeature( f );
+      mLayer->getFeatures( QgsFeatureRequest().setLimit( 1 ) ).nextFeature( f );
       mExpressionContext.setFeature( f );
     }
   }