我按照Primefaces DataGrid展示来做我的数据表。我想为每行数据表创建一个编辑图像按钮,然后在onclick上我想显示一个编辑对话框表单。
问题是setSelectedChannel方法没有在commandlink上触发,因此当对话框尝试访问selecteChannel字段时出现此错误:
javax.el.PropertyNotFoundException: /WEB-INF/includes/channels.xhtml @54,91 value="#{channelBean.selectedChannel.name}": Target Unreachable, 'selectedChannel' returned null
所以这是我的xhtml包含页面:
<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">
<h:form id="channelForm">
<p:dataTable var="channel" value="#{channelBean.channels}">
<p:column headerText="Name">
<h:outputText value="#{channel.name}" />
</p:column>
<p:column headerText="Field 1">
<h:outputText value="#{channel.field1}" />
</p:column>
<p:column headerText="Field 2">
<h:outputText value="#{channel.field2}" />
</p:column>
<p:column headerText="ApiWriteKey">
<h:outputText value="#{channel.apiWriteKey}" />
</p:column>
<p:column headerText="Edit">
<p:commandLink update=":channelForm:panelEditCh" oncomplete="PF('dlg2').show();" title="Edit">
<h:outputText styleClass="ui-icon ui-icon-search" style="margin:0 auto;" />
<f:setPropertyActionListener value="#{channel}" target="#{channelBean.selectedChannel}" />
</p:commandLink>
</p:column>
</p:dataTable>
<p:dialog id="dialogNewChannel" header="New Channel" widgetVar="dlg1" modal="false" >
<h:panelGrid columns="2" style="margin-bottom:10px" cellpadding="5">
<p:outputLabel for="channelName" value="Channel name:" />
<p:inputText id="channelName" value="#{channelBean.name}" />
<p:outputLabel for="channelDesc" value="Channel description:" />
<p:inputText id="channelDesc" value="#{channelBean.description}" />
<p:outputLabel for="channelField1" value="Channel field 1:" />
<p:inputText id="channelField1" value="#{channelBean.field1}" />
<p:outputLabel for="channelField2" value="Channel field 2:" />
<p:inputText id="channelField2" value="#{channelBean.field2}" />
</h:panelGrid>
<p:commandButton id="saveButton" value="Save" action="#{channelBean.saveChannel}" update="channelForm" ajax="true" />
<p:commandButton value="Cancel" type="button" action="#{channelBean.resetForm}" onclick="PF('dlg1').hide();" />
</p:dialog>
<p:dialog id="dialogEditChannel" header="Edit Channel" widgetVar="dlg2" modal="false" >
<h:panelGrid id="panelEditCh" columns="2" style="margin-bottom:10px" cellpadding="5">
<p:outputLabel for="channelNameEdit" value="Channel name:" />
<p:inputText id="channelNameEdit" value="#{channelBean.selectedChannel.name}" />
<p:outputLabel for="channelDescEdit" value="Channel description:" />
<p:inputText id="channelDescEdit" value="#{channelBean.selectedChannel.description}" />
<p:outputLabel for="channelField1Edit" value="Channel field 1:" />
<p:inputText id="channelField1Edit" value="#{channelBean.selectedChannel.field1}" />
<p:outputLabel for="channelField2Edit" value="Channel field 2:" />
<p:inputText id="channelField2Edit" value="#{channelBean.selectedChannel.field2}" />
</h:panelGrid>
<p:commandButton id="saveButtonEdit" value="Save" action="#{channelBean.saveChannel}" update="channelForm" ajax="true" />
<p:commandButton value="Cancel" type="button" action="#{channelBean.resetForm}" onclick="PF('dlg2').hide();" />
</p:dialog>
<p:spacer></p:spacer>
<p:spacer></p:spacer>
<p:commandButton value="New Channel" type="button" onclick="PF('dlg1').show();" />
<!-- <p:blockUI block="dialogNewChannel" trigger="saveButton">
<p:graphicImage name="images/ajax-loader-large.gif"/>
</p:blockUI>
-->
</h:form>
和ManagedBean:
@ManagedBean
@ViewScoped
public class ChannelBean implements Serializable {
/**
*
*/
private static final long serialVersionUID = -1668407926998690759L;
private String idChannel;
private String apiWriteKey;
private String name;
private String description;
private String userId;
private String field1;
private String field2;
private Channel selectedChannel;
private List<Channel> channels= new ArrayList<Channel>() ;
@PostConstruct
public void populateChannelList(){
refreshList();
}
public void refreshList(){
HttpSession session = Util.getSession();
int idUser=-1;
if(session!=null &&session.getAttribute("idUser")!=null){
idUser=(int) session.getAttribute("idUser");
}
channels=ChannelDAO.getChannels(idUser);
}
public void saveChannel(){
....
}
public void resetForm(){
idChannel="";
apiWriteKey="";
name="";
description="";
userId="";
field1="";
field2="";
}
public String getIdChannel() {
return idChannel;
}
public void setIdChannel(String idChannel) {
this.idChannel = idChannel;
}
public String getApiWriteKey() {
return apiWriteKey;
}
public void setApiWriteKey(String apiWriteKey) {
this.apiWriteKey = apiWriteKey;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
public String getField1() {
return field1;
}
public void setField1(String field1) {
this.field1 = field1;
}
public String getField2() {
return field2;
}
public void setField2(String field2) {
this.field2 = field2;
}
public List<Channel> getChannels() {
return channels;
}
public void setChannels(List<Channel> channels) {
this.channels = channels;
}
public Channel getSelectedChannel() {
return selectedChannel;
}
public void setSelectedChannel(Channel selectedChannel) {
this.selectedChannel = selectedChannel;
}
}