try
var list = [{name: "Arizona", id: 1},{name: "Kansas", id: 2}];
var selectBox = new qx.ui.form.SelectBox();
var model = qx.data.marshal.Json.createModel(list);
var controller = new qx.data.controller.List(model, selectBox, "name");
this.getRoot().add(selectBox);
var data = {state:2};
var formModel = qx.data.marshal.Json.createModel(data, true);
var formController = new qx.data.controller.Object(formModel);
// how to bind model "state" with selectbox model "id"
formController.addTarget(controller, "selection[0]", "state", true,
{converter: function(data){
for (var i = 0; i < model.getLength(); i++) {
if (model.getItem(i).getId() == data) return
model.getItem(i);
}
}}, {converter: function(data){
return data.getId();
}});
formModel.addListener("changeBubble", function(event){
// function for saving in database user selected state
}, this);
--
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