Editable Data table in request scop JSF2.0 - jsf-2

Question

Hi All
I have list of module object. I want to show it to user and user can edit it and can save it also. In module object three members are there 1 String moduleName 2.boolean readFlag
3. writFlag.
The bean i am using is in Request Scop i don't want to use any other scop.
My problem is setterOfThatList is not called when update button is clicked.
Where as on the same page i used another inputText, setter of the variable which is connected to this inputText is called.
<h:dataTable value="#{roleBean.listMatrixDo}" var="list">
<h:column>
<f:facet name="header">
<h:outputText value="Module Name"></h:outputText>
</f:facet>
<h:outputText value="#{list.moduleDo.moduleName}"></h:outputText>
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="Read Access"></h:outputText>
</f:facet>
<h:selectBooleanCheckbox value="#{list.readFlag}" />
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="Write Access"></h:outputText>
</f:facet>
<h:selectBooleanCheckbox value="#{list.writeFlag}" />
</h:column>
</h:dataTable>

Answer 1

My problem is setterOfThatList is not called when update button is clicked
The setter is never called for collection and nested properties. JSF does basically as follows:
((RowObject) bean.getList().get(rowIndex)).setSomeProperty(submittedValue);
It gets the list and then gets the row object by current index and then sets the property on it. As you see, it's important that the very same list is already prepared in the subsequent request (i.e. you need to do it in constructor/postconstruct of the bean).
This is regardless of the scope. In view and session scope, however, you don't need to prepare the list in subsequent requests. I'd recommend to use the view scope when data loading from the DB is been involved.
If your intent is to process/save the submitted data, then you should just do the job in the bean's action method which you attached to the commandbutton.
public void submit() {
someService.save(list);
}