javax.faces.facexception:DataModel必须在启用选择时实现org.primefaces.m

Question

我还有另一个问题，即我有一个扩展基本实体的模型，并且基本实体具有属性ID。我使用该ID作为Rowkey，并且会引发此错误。当我将Rowkey的价值设置为从模型（而不是抽象基础）的任何属性设置时，DataTable Works。

请注意，我正在使用Javaee6。

模型：

@Entity
@SequenceGenerator(name = "ID_GENERATOR", sequenceName = "USER_ADDRESS_SEQ")
public class UserAddress extends BaseEntity { //.. }
@MappedSuperclass
public abstract class BaseEntity implements Serializable, IEntity {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(generator = "ID_GENERATOR")
    @Column(name = "ID")
    private Long id;
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    } ..

javaee6 bean：

@Stateless
@Named
public class UserAddressBean implements Serializable {
    private static final long serialVersionUID = -6104153017102665096L; 
    private List<UserAddress> addresses;
    private UserAddress address;
    public List<UserAddress> getAddresses() {
        addresses = new ArrayList<UserAddress>();
        UserAddress temp = new UserAddress();
        temp.setDescription("test");
        addresses.add(temp);
        temp = new UserAddress();
        temp.setDescription("test");
        addresses.add(temp);
        return addresses;
    }
    public UserAddress getAddress() {
        return address;
    }
    public void setAddress(UserAddress address) {
        this.address = address;
    }..

和XHTML页面：

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:p="http://primefaces.org/ui"
    template="/shared/page/_oneColumn.xhtml">
    <ui:define name="content">
        <h:form id="form">
            <p:panel>
                <f:facet name="header"></f:facet>
                <p:dataTable id="addresses" var="address"
                    value="#{userAddressBean.addresses}" rowKey="#{address.id}"
                    selection="#{userAddressBean.address}" selectionMode="single">
                    <p:column headerText="#{msg['field.description']}">
                        <h:outputText value="#{address.description}" />
                    </p:column>
                </p:dataTable>
                <f:facet name="footer"></f:facet>
            </p:panel>
        </h:form>
    </ui:define>
</ui:composition>

对这个问题有任何想法吗？

谢谢
czetsuya

Answer 1

哦，对不起，我很愚蠢，问题是id是无效的。我忘记了我硬编码值。因此，无论如何对于将来会遇到同一问题的人使用较少的代码行键，请确保您拥有以下数据表属性：1.）Rowkey2.）选择3.）SelectionMode

还确保Rowkey属性不是零。