populating clickable datatable by data comming from OneToMany relationship?

[michal.mich.kuna.gmail.com]

Hello,

Is it possible to make a clickable datatable populated by data comming from OneToMany relationship?

<a4j:form>
     <rich:dataTable value="#{person.cars.toArray()}" var="car">

          <rich:columnGroup>
               <rich:column>
                    #{car.id}
               </rich:column>
               <rich:column>
                    <a4j:commandLink value="remove" action="#{somebean.removeCar(car)}" />
               </rich:column>
          </rich:columnGroup>
        </rich:dataTable>
</a4j:form>

I know it will work if i populate the datatable with data comming from a Factory method, but this kind of solution I dont find optimal ;) So the question is:

Is it possible to make a clickable datatable populated by data comming from OneToMany relationship?

[gjeudy]

Yes this is certainly possible but why use

#{person.cars.toArray()}

?

I havent tested this but I guess it will work with JBoss EL handling the method call ?

I usually do something like

#{person.cars}

, this will work if you have a matching getter that return a list:

List<Car> getCars()

on person class.

[michal.mich.kuna.gmail.com]

Hello Guillaume,

Thats probably the same thing i've tried to use before:

Person:

@Entity
Person {

        private Set<Car> cars;

        // strip......

        // for returning
        public List<Car> getCarList() {
          return new ArrayList<Car>(cars);
     }

}

But still the action method ::

<a4j:commandLink value="remove" action="#{somebean.removeCar(car)}" />

defined in the datatable is never called.

It seems like either I am missing something, or EL does not handle the method call in this way.