DropDown in TableColumn not working

Question

Hello,
I am chasing this now for some hours.
I have a dropdown2 in column4 and some textfields in other columns in a table1 in a form1. The table has just two rows. When the form is beeing posted the http request holds the right information (checked with http monitor).
e.g.:
form1:table1:tableRowGroup1:0:tableColumn4:dropDown2     K
form1:table1:tableRowGroup1:1:tableColumn4:dropDown2     BThe dropDown2 is bound with a DefaultTableDataProvider (-> 'includeFields' checked) to a field "Anrede" of an array of two instances of a selfmade person class:
public class person {
    private String Name;
    private String Vorname;
    private String Alter;
    private String Anrede = "H";
    ...and just the getter & setter methods without any magic.
    All values of the textfields hold exactly the given values of the form after posting.
And now comes the strange thing.
The values of the dropdown are mixed up. In the end the person[0].Anrede equals "B" when it should be "K" and person[1].Anrede equals the default value "H" but it should be "B".
With the debugger I traced this deep into JSF and came to a method called fireValueChanged of class AbstractTableDataProvider. Examining the values of variables there shows that newValue is "B" and old value is "K" in this method. I do not know why but somehow the values of all (= in this case 2) dropDowns are pushed in the first person[0].Anrede field. I could not find the point where the actual assignment is done. fireValueChanged is only the "echo" of this assignment when the right listeners are getting informed about this. A hint about the right class where the assignment is done would be great to set a breakpoint there.
Any other suggestion what I can do to resolve this?
Juergen

Answer 1

We solved this issue today.
The dropdown selected value was bound to
#{page1.defaultTableDataProvider.value['anrede']}but it should be bound to
#{currentRow.value['anrede']}We could not find out how this mistake happened.
But now we do not understand why
#{page1.defaultTableDataProvider.value['anrede']}does not result in an error.
Which value is retrieved by this statement?
Juergen