小编Bel*_*uel的帖子

我使用JSF 2,primefaces 4.0,我尝试使用DataTable - In-Cell Editing,因为它是在primefaces展示中生成的,但我有一个错误,虽然我复制了showcase中显示的相同示例错误是

<p:ajax> Unable to attach <p:ajax> to non-ClientBehaviorHolder parent

这是xhtmlpagecode

 <rich:panel  style="width : 800px; height : 551px; " > 
     <f:facet name="header" >

<h:outputText value="Tableau des articles" align="center" style="FONT-SIZE: small;"/>
            </f:facet>


    <h:form id="form">

   <p:dataTable id="cars" var="car" value="#{articlesbean.LMatpilotaccess1}" editable="true" editMode="cell" widgetVar="carsTable">  

        <f:facet name="header">  
            Matériel du pilotage et accessoires 
        </f:facet>  
  <p:growl id="messages" showDetail="true"/>  

    <p:contextMenu for="cars" widgetVar="cMenu">     
        <p:menuitem value="Edit Cell" icon="ui-icon-search" onclick="PF('carsTable').showCellEditor();return false;"/>    
        <p:menuitem value="Hide Menu" icon="ui-icon-close" onclick="PF('cMenu').hide()"/>    
    </p:contextMenu>   


        <p:column headerText="Serie" style="width:25%">  
               <p:ajax event="cellEdit" listenner="#{articlesbean.onCellEdit}" update=":form:messages" /> 

               <p:cellEditor>  
                   <f:facet …

我得到了以下代码

@Stateless
public class BondecomandeDAO {

    @PersistenceContext
    private EntityManager em;

    public Bondecommande findBCbyid(int id)
    {
         Query q =em.createNamedQuery("select bc from Bondecommande bc where bc.idbc = :idbc");
         q.setParameter("idbc", id);
         return  (Bondecommande) q.getResultList().get(0);
     }
}

和

@Entity
@Table(name="bondecommande")
public class Bondecommande  implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name="idbc")
    private int idbc;
    @Column(name="devise")
    private String devise;
    @Column(name="modepaiement")
    private String modepaiement;
    @Column(name="modelivraison")
    private String modelivraison;
    @Column(name="delaipaiement")
    private int delaipaiement;

      ////other attributes , getters and setters 
} …

我有这个简单的数据表：

<h:dataTable id="table1" value="#{fournisseurbean.BC.listematpilotaccess1}" style="width : 900px;  " var="item"
             border="1">

    <h:column>
        <f:facet name="header">
            <h:outputText value="idmatpilotaccess1n" />
        </f:facet>
        <h:outputText value="#{item.idmatpilotaccess1}" />
    </h:column>
    <h:column>
        <f:facet name="header">
            <h:outputText value="serie" />
        </f:facet>
        <h:outputText value="#{item.serie}" />
    </h:column>

</h:dataTable>

如果没有要显示的数据，我想不显示此表，因此何时 #{fournisseurbean.BC.listematpilotaccess1}为空。我怎样才能做到这一点？