Vaadin 8 ComboBox does not show empty selection caption in selected value

[ericcournarie]

When trying to use a ComboBox, I tried to set the empty selection caption with the followings

setEmptySelectionAllowed(true);
setEmptySelectionCaption("My empty caption");

The empty caption appears well in the Combobox menu, but once selected, the selected field value is always blank, whatever I did. And setting it programmatically with setValue (null) does not make it appear

I check the setItemCaptionGenerator, but my lambda expression is not called with a null value.

sample code:

       ComboBox<String> cb = new ComboBox<>();
       cb.setEmptySelectionAllowed(true);
       cb.setEmptySelectionCaption("nobody");
       cb.setItems("John", "Bob", "Barry");
       cb.setValue(null);
       cb.setItemCaptionGenerator(f -> (f == null) ? "nobody by caption" : f);

I'm using version 8.0.5

[tsuoanttila]

This is a behaviour change from Vaadin 7, where you had a "null item" in your container, that acted as the empty selection. Now with Vaadin 8, there's no null item. And it seems that the empty selection caption is indeed not being displayed correctly. I need to consult our UX guys on how it should behave.

[tsuoanttila]

This was picked to 8.0.7