使用primefaces的部分处理时丢失datagrid的最后一个条目

Question

<h:form id="formServicesTab">
        <h:panelGrid id="pnlSvcTab" columns="1" styleClass="valignTop" width="100%">
            <p:dataGrid id="dgServices" var="service"
                value="#{subMerchantOperations.subMerchantServices}"
                columns="1" width="100%" styleClass="valignTop"
                emptyMessage="#{messagebundle.submerc_grdlabel_no_service}" transient="true"
                rowIndexVar="index" >

                <p:toolbar>
                    <p:toolbarGroup align="left">
                        <p:commandButton id="btnRemoveSvc" onclick="loading.show();"
                            oncomplete="loading.hide();"
                            value="#{messagebundle.submerc_btn_delete_service}"                         
                            actionListener="#{subMerchantOperations.removeService}"                     
                            process="@form" update="@form">

                            <f:setPropertyActionListener target="#{subMerchantOperations.serviceRowIndex}" value="#{index}" />
                        </p:commandButton>                      
                    </p:toolbarGroup>
                </p:toolbar>

                <h:panelGrid columns="3" styleClass="valignTop" width="100%" bgcolor="F0F0F0">
                    <p:panel style="background:#F0F0F0;">
                        <h:panelGrid id="pnlDgSvc" columns="1" width="100%" style="height:100%">
                            <h:outputText value="#{messagebundle.submerc_label_svc_shortName}" />
                            <h:panelGrid columns="2">
                                <p:inputText id="txtSvcName" value="#{service.serviceName}"
                                    required="true" transient="true"
                                    requiredMessage="#{messagebundle.submerc_validation_msg_required}"
                                    converter="UpperCaseConverter" />
                                <p:message for="txtSvcName" display="text" />
                            </h:panelGrid>

                            <h:outputText value="#{messagebundle.submerc_label_svc_website}" />
                            <p:inputText value="#{service.serviceUrl}" transient="true"/>                           
                        </h:panelGrid>
                    </p:panel>

                    <p:panel style="background:#F0F0F0;">
                        <h:panelGrid columns="1" width="100%">
                            ..........
                        </h:panelGrid>
                    </p:panel>

                    <p:panel style="background:#F0F0F0;">
                        <h:panelGrid id="pgSvcFiles" columns="1" width="100%">
                            ...........      
                        </h:panelGrid>
                    </p:panel>
                </h:panelGrid>
            </p:dataGrid>
        </h:panelGrid>
        <p:toolbar style="background:white">
            <p:toolbarGroup align="left">               
                <p:commandButton id="btnAddNewSvc"                  
                    value="#{messagebundle.submerc_btn_addSvc}"                  
                    actionListener="#{subMerchantOperations.addNewService}"
                    process="@form" update="@form" />

                <p:commandButton id="btnSaveSubM"                   
                    value="#{messagebundle.submerc_btn_sendApproval}"                   
                    action="#{subMerchantOperations.saveServices}" 
                    process="@form" update="@form" />
            </p:toolbarGroup>
        </p:toolbar>
    </h:form>

@ManagedBean
@ViewScoped
public class SubMerchantOperations implements Serializable {
    private static final long serialVersionUID = 8556103952857187080L;  

    private List<Service> subMerchantServices = new ArrayList<Service>();
    private int serviceRowIndex;    

    // add new empty service to the service list
    public void addNewService() {
        try {
            Service svc = new Service();
            svc.setStartDate(new Date());
            getSubMerchantServices().add(svc);                      
        }
        catch(Exception ex) {
            if (logger.isEnabledFor(Level.ERROR)) {
                ...
            }           
        }       
    }

    // Remove the specified service using index parameter got from the datagrid
    public void removeService() {
        try {
            getSubMerchantServices().remove(serviceRowIndex);   
        }
        catch(Exception ex) {
            ... 
        }                               
    }

    // DB Operations
    public String saveSubMerchant() {       
        ...
    }

    public List<Service> getSubMerchantServices() {
        return subMerchantServices;
    }

    public void setSubMerchantServices(List<Service> subMerchantServices) {
        this.subMerchantServices = subMerchantServices;
    }
    public int getServiceRowIndex() {
        return serviceRowIndex;
    }

    public void setServiceRowIndex(int serviceRowIndex) {
        this.serviceRowIndex = serviceRowIndex;
    }
}

Answer 1

我不知道 属性在 上做什么。我已经查看了Primefaces PDF文档的最新发布版本，但这并不是一个有效属性。

如果您发现基于Facelet的组件验证会导致空表单在提交某个按钮时触发验证错误，那么您可以考虑在支持bean中创建一个由submit方法调用的方法，并验证bean上元素的状态。这是Primefaces的一种流行方法，因为与seam不同，我们没有提供表单级验证。

但是，请检查一下您对immediate=true的理解。

或者，您可以考虑使用JSR303注释来注释POJO的属性。

由于您使用的是集合，请确保您的服务POJO重写equals和hashcode，以排除您的集合没有发生什么错误并导致您的问题。