Problem with datatable update

[Demarcus Smith]

Hi all, I'm pretty new to JSF, but here's my question:

I have a datatable in which I have a column where each row contains a selectOneMenu. So, the initial value of each menu I take from the database. When the user selects a new value, i want that row to update to take on the new value. I have an a4j:support tag with event="onChange", but when user selects a row, every row in the datatable takes the value they selected for that one row! Do I need to bind my datatable to my backing bean somehow? Here's some code:

    
<rich:datatable value="bean.projects" var="prj">
 <rich:column>
  <h:selectOneMenu value="#{prj.role.id}">
      <f:selectItems value="#{bean.roleDropDown}" />
      <a4j:support event="onchange" action="#{bean.updateRoles}" />
  </h:selectOneMenu>
...

For example, if i have a column where the roles for each row are : employee,manager,employee. If the user changes the 3rd row to a developer, then when the I debug the bean.updateRoles method, the roles have been submitted as a developer for all 3 rows, instead of just the 3rd one! Any ideas? I don't have any bindings...

[Demarcus Smith]

Does anyone have any idea on this? Do you need more code?

[Kavita Tipnis]

Yes, you will have to bind your datatable , then in your action event listener, get the current row data and change it.
Do not forget to reRender your table.