UIX: MessageList : How to add empty option?

Question

Hi everyone, I've got this MessageList code:
<messageList model="${bindings.IdUnidadOrg1}" prompt="Father" required="no">
<contents childData="${bindings.IdUnidadOrg1.displayData}">
<option model="${uix.current}"/>
</contents>
</messageList>
The data in the bindings don't contain the empty option, how can I add it, so the user can choose between the data in the bindings or nothing?
I tried this:
<contents childData="${bindings.IdUnidadOrg1.displayData}">
<option value="" text="None"/>
<option model="${uix.current}"/>
</contents>
But it renders the "None" option once for each current object.
Thanks for your help in advance.
Fernando.

Answer 1

<contents
childData="${bindings.IdUnidadOrg1.displayData}">
<option value="" text="None"/>
<option model="${uix.current}"/>
</contents>Hi Fernando!
Try this syntax, it should work fine.
<contents>
<option text="" value=""/> <!-- this is what you're looking for. Putting the empty option outside of the datascope--->
<dataScope>
<contents childData="${bindings.<iterator of the viewobject you want to query>.allRowsInRange}">
<option text="${uix.current.att1}" value="${uix.current.att2}"/>
</contents>
</dataScope>