无法使用 p:dataTable 将列表作为参数传递给 p:commandButton

Question

有人帮忙吗... 我正在尝试将 list 作为参数传递给 p:dataTable 中的 p:commandButton。它总是 null.

这有什么问题吗？提前致谢！

屏幕组件：

<h:form id="form-upload" enctype="multipart/form-data">
    <div class="">
        <h:outputText value="Foram encontradas as seguintes restrições:" />
        <br /> <br />

        <p:dataTable var="restricao" id="listaRestricoes"
                     value="#{decompDecisaoRestricoesController.listView}">
            <p:inputText value="#{restricao.id}" type="hidden" />
                            
            <p:column headerText="Restrição">
                <h:outputText value="#{restricao.nome}" />
                                
                <p:selectOneRadio id="comentar"
                                  value="#{restricao.comentar}" layout="custom">
                    <f:selectItem itemValue="sim" />
                    <f:selectItem itemValue="nao" />
                </p:selectOneRadio>
            </p:column>

            <p:column headerText="Comentar">
                <p:radioButton for="comentar" itemIndex="0" />
            </p:column>

            <p:column headerText="Descomentar">
                <p:radioButton for="comentar" itemIndex="1" />
            </p:column>

        </p:dataTable>
    </div>
    <div class="button-group">
        <p:commandButton icon="ui-icon-circle-triangle-e"
                         value="Executar" widgetVar="uploadButton" 
                         action="#{decompDecisaoRestricoesController.chamaService(listaRestricoes)}" />
    </div>
</h:form>

控制者：

@Named
@RequestScoped
public class DecompDecisaoRestricoesController implements Serializable {

    private static final long serialVersionUID = -6252355181831338279L;

    @Inject
    private DecompDecisaoRestricoesService service;

    private List<RestricaoDecomp> listView;

    public List<RestricaoDecomp> getListView() {
        return listView;
    }

    public void setListView(List<RestricaoDecomp> listView) {
        this.listView = listView;
    }

    public void onLoad() {
        listView = service.listaRestricoesBanco();
    }

    public void chamaService(List<RestricaoDecomp> lista) {
        service.executar(lista);
    }

}

和服务：

@Stateless
public class DecompDecisaoRestricoesService {

    @Inject
    RestricaoDecompDAO restricaoDecompDAO;

    private Logger logger = LoggerFactory.getLogger(this.getClass());

    public void executar(List<RestricaoDecomp> lista) {
        for (RestricaoDecomp restricao : lista) {
            logger.info("NOME: " + restricao.getNome());
            logger.info("COMENTAR:  " + restricao.getComentar());
        }
    }

    public List<RestricaoDecomp> listaRestricoesBanco() {
        List<RestricaoDecomp> lista = new ArrayList<RestricaoDecomp>();
        lista = restricaoDecompDAO.listAll();
        return lista;
    }

}

渲染时，列表显示在视图中。但是在提交时，它只发送 null.

Answer 1

做到了！该 bean 是 RequestScoped，因此，在请求之后，它只是丢弃了列表值。

将其更改为 ViewScoped 瞧！提交后列表值在那里，字段发生变化。

在那之后，我只是在提交后清理了view。像这样：

<p:commandButton icon="ui-icon-circle-triangle-e" onsuccess="window.location.reload(); ..."

=)

无法使用 p:dataTable 将列表作为参数传递给 p:commandButton

Can´t pass List as parameter to p:commandButton using p:dataTable

jsf

primefaces