How to make one-option dropdown list partial trigger?

There are two dependent dropdown lists. when list one is selected, the other one will get the SelectItems according the value of list one. My question is: when there is only one selectiem in list one (and the hint 'Please select one..."), how to make it partial trigger in the second time? e.g. I first login and select the ONLY one choice in List one, and the List two gets the values. but the data in datasource updated, so I want to choose the List one again, and make the List two get the new values.

Hi,
create a JSF binding (Bindings property on the list component) to a managed bean. The in the code that would trigger the PPR, call
AdfFacesContext.getCurrentInstance().addPartialtarget(theListBindingName);
If you have a refresh button, then you could use declarative PPR
Frank

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