删除元素时不会更新Primefaces数据表

Question

我有一个使用rowedit的p:datatable，可以正常工作，但是当您删除一个条目时，datatable没有更新。

@Named(value = "localesMB")
@SessionScoped
public class LocalesMB implements Serializable {
  /**
  * Creates a new instance of Activos
  */
  public LocalesMB() {
  }

  private List<entidades.Locales> localesAll = new ArrayList<>();
  private entidades.Locales selected = new Locales();

  public Locales getSelected() {
      return selected;
  }

  public void setSelected(Locales selected) {
    this.selected = selected;
  }


  public List<Locales> getLocalesAll() {
    return localesAll;
  }

  public void setLocalesAll(List<Locales> localesAll) {
    this.localesAll = localesAll;
  }

  public void deleteSelect(Locales locales) {
    this.selected = locales;
  }

  public void obtenerLocalesAll() {
    try {

        FacesContext ctx1 = FacesContext.getCurrentInstance();
        ValueExpression vex1 = ctx1.getApplication().getExpressionFactory().createValueExpression(ctx1.getELContext(), "#{controladorMB}", ControladorMB.class);
        ControladorMB cn = (ControladorMB) vex1.getValue(ctx1.getELContext());
        this.localesAll = cn.getInterfaces().obtenerLocalesAll();

    } catch (Exception e) {
        JsfUtil.addErrorMessage(e, "Error: obtenerActivosAll() " + e.getMessage());
    }
  } 

  public void eliminarLocal() {
    try {
        FacesContext ctx1 = FacesContext.getCurrentInstance();
        ValueExpression vex1 = ctx1.getApplication().getExpressionFactory().createValueExpression(ctx1.getELContext(), "#{controladorMB}", ControladorMB.class);
        ControladorMB cn = (ControladorMB) vex1.getValue(ctx1.getELContext());
        cn.getInterfaces().eliminarLocal(this.selected);
        this.localesAll = cn.getInterfaces().obtenerLocalesAll();
    } catch (Exception e) {
        JsfUtil.addErrorMessage(e, "Error: eliminarLocal() " + e.getMessage());
    }
  }  

  public void onRowEdit(RowEditEvent event) {
    try {
        Locales ps = (Locales) event.getObject();
        FacesContext ctx1 = FacesContext.getCurrentInstance();
        ValueExpression vex1 = ctx1.getApplication().getExpressionFactory().createValueExpression(ctx1.getELContext(), "#{controladorMB}", ControladorMB.class);
        ControladorMB cn = (ControladorMB) vex1.getValue(ctx1.getELContext());
        cn.getInterfaces().modificarLocal(ps);
        this.localesAll = cn.getInterfaces().obtenerLocalesAll();            
        JsfUtil.addSuccessMessage("Se ha cambiado el valor correctamente.");
    } catch (Exception e) {
        JsfUtil.addErrorMessage(e, "Error: onRowEdit() " + e.getMessage());
    }
  }
}

xhtml

 <h:head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <link href="./../resources/css/default.css" rel="stylesheet" type="text/css" />
    <link href="./../resources/css/cssLayout.css" rel="stylesheet" type="text/css" />
    <title>Activos</title>
    <script language="javascript">
        window.onload = function() {
            PF('tb1').clearFilters();
        };
    </script>
</h:head>

<h:body>
 <h:form id="frm1">
        <p:growl id="growl" sticky="true" showDetail="true"/>  
        <p:panel header="Locales e Instalaciones" id="pn1">              
            <p:dataTable  emptyMessage="No se encontraron elementos"  editable="true" rowKey="#{item.idLocales}"
                          id="tabla_listado" var="item"  paginator="true"  widgetVar="tb1"
                          rows="25"  value="#{localesMB.localesAll}"> 

                <f:facet name="header">
                    <h:outputText value="Locales e Instalaciones: #{localesMB.localesAll.size()}"/>
                </f:facet>

                <p:ajax event="rowEdit"  listener="#{localesMB.onRowEdit}"/>  

                <p:column headerText="Descripción">  
                    <p:cellEditor>  
                        <f:facet name="output">  
                            <h:outputText value="#{item.descripcion}" />
                        </f:facet>  
                        <f:facet name="input">  
                            <p:inputText value="#{item.descripcion}" style="width:95%"/>  
                        </f:facet>  
                    </p:cellEditor>  
                </p:column> 
                <p:column headerText="Ubicación">  
                    <p:cellEditor>  
                        <f:facet name="output">  
                            <h:outputText value="#{item.ubicacion}" />
                        </f:facet>  
                        <f:facet name="input">  
                            <p:inputText value="#{item.ubicacion}" style="width:95%"/>  
                        </f:facet>  
                    </p:cellEditor>  
                </p:column>                 

                <p:column style="width:20px">  
                    <p:rowEditor/>  
                </p:column> 
                <p:column style="width:20px">  
                    <p:commandButton id="selectButton256" oncomplete="PF('confirmation').show()" process="@this, tabla_listado"  actionListener="#{localesMB.deleteSelect(item)}" 
                                     icon="ui-icon-trash" title="Eliminar" update=":frm1:confirmDialog">
                    </p:commandButton>  
                </p:column>        
            </p:dataTable>  

        </p:panel>
        <p:confirmDialog appendTo="@(body)" id="confirmDialog" message="Confirma que desea eliminar a: #{localesMB.selected.descripcion}"  
                         header="Mensaje de Confirmación" severity="alert" widgetVar="confirmation" closeOnEscape="true">  
                <p:commandButton id="confirm" value="Sí" update=":frm1"  oncomplete="PF('confirmation').hide()"  
                                 actionListener="#{localesMB.eliminarLocal}" process="@this" styleClass="ui-confirmdialog-yes" icon="ui-icon-check"/>  
                <p:commandButton id="decline" value="No" onclick="PF('confirmation').hide()" type="button" styleClass="ui-confirmdialog-no" icon="ui-icon-close"/>   
        </p:confirmDialog>  
    </h:form>      

Answer 1

这段代码激活了过滤器，但datatable没有filterValue：

   <script language="javascript">
        window.onload = function() {
            PF('tb1').clearFilters();
        };
    </script>

DataTable frm1:tabla_listado已启用筛选，但未定义filteredValue模型引用，以便向后兼容回退到page viewstate方法以保持filteredValue。强烈建议将筛选与filteredValue模型引用一起使用，因为viewstate方法已被弃用，将来将被删除。

解决方案：删除脚本。