JSF UIRepeat and PostBack - jsf

Question

I have a simple page where a I use <ui:repeat> and it gets the value from a backing bean.
The initial request will give it an empty list. The postback then will invoke an action that will change the model behind the <ui:repeat> but it is not rendered?!
I debugged through it and I saw that the <ui:repeat> evaluates the value at restore view phase but thats it. When it reaches render response it does not use the latest value from my bean. Is that the expected behavior?
How can I make that work? Do I have to write my own repeat tag?

Answer 1

I can't really tell what could be the problem without some of your code, but these are the basics:
Backing bean:
public class ObjectService{
private DataModel objectDataModel;
private List<Object> objectList;
private Pagination paginationHelper;
private ObjectDao objectDao = new ObjectDao();
private String queryOption;
public void setQueryOption(String queryOption){
this.queryOption = queryOption;
}
public String getQueryOption(){
return this.queryOption;
}
public <E> PaginationHelper getPagination(final List<E> list) {
pagination = new PaginationHelper(10) {
#Override
public int getItemsCount() {
return list.size();
}
#Override
public DataModel createPageDataModel() {
return new ListDataModel(list);
}
};
return pagination;
}
public void setPagination(PaginationHelper pagination) {
this.pagination = pagination;
}
public List<Object> getObjectList(){
this.objectList = objectDao.readObjectsWhere(queryOption);
return this.objectList;
}
public void setObjectList(List<Object> objectList){
this.objectList = objectList;
}
public DataModel getObjectDataModel(){
if (objectDataModel == null) {
objectDataModel = getPagination(getObjectList()).createPageDataModel();
}
return objectDataModel;
}
public void setObjectDataModel(DataModel objectDataModel){
this.objectDataModel = objectDataModel
}
public String changeModel(){
objectDataModel = null;
return null;
}
}
XHTML page:
...
<h:form>
<fieldset>
<label>
<span>Option:</span>
<h:inputText value="#{objectService.queryOption}" />
</label>
<h:commandButton action="#{objectService.changeModel}" value="request data" />
</fieldset>
<ui:repeat value="#{objectService.objectDataModel}" var="objectVar">
<h:outputLabel value="#{objectVar.property1}" />
<h:outputLabel value="#{objectVar.property2}" />
<h:outputLabel value="#{objectVar.property3}" />
</ui:repeat>
</h:form>
...