h:commandButton inside h:dataTable [duplicate]

Answer 1

Use DataModel#getRowData() to obtain the current row in action method.

@ManagedBean
@ViewScoped
public class Usermanager {
    private List<Doctor> doctors;
    private DataModel<Doctor> doctorModel;

    @PostConstruct
    public void init() {
        doctors = getItSomehow();
        doctorModel = new ListDataModel<Doctor>(doctors);
    }

    public void followDoctor() {
        Doctor selectedDoctor = doctorModel.getRowData();
        // ...
    }

    // ...
}

Use it in the datatable instead.

<h:dataTable value="#{usermanager.doctorModel}" var="doc">

And get rid of that h:inputHidden next to the h:commandButton in the view.

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An -less elegant- alternative is to use f:setPropertyActionListener.

public class Usermanager {
    private Long doctorId;

    public void followDoctor() {
        Doctor selectedDoctor = getItSomehowBy(doctorId);
        // ...
    }

    // ...
}

With the following button:

<h:commandButton action="#{usermanager.followDoctor}" value="Follow">
    <f:setPropertyActionListener target="#{usermanager.doctorId}" value="#{doc.doctorId}" />
</h:commandButton>

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Related:

• The benefits and pitfalls of @ViewScoped - Contains CRUD example using DataModel<E>.