如果单击了AjaxButton,我正在尝试向Wicket中的FeedbackPanel发送成功消息。然而,我收到以下错误消息:
Wicket.Ajax.Call.processComponent:尝试执行标记更新时找不到具有id [[065DFC0DD1DC51103CC5FFEE61F2AE12]]的组件。
我已经知道,在使用AjaxButton并在onSubmit
中设置目标之前,我必须在Java代码中输出markupID。我也设置setOutputMarkupPlaceholderTag
一次,但它没有改变任何东西
我还创建了一个小测试页面,成功将成功消息发送到FeedbackPanel。
因此我开始调试项目,发现从DefaultMarkupIdGenerator.generateMarkupId
返回的markupID确实与HTML中显示的不同。此外,所有FeedbackPanels在ajax调用期间都会收到此markupID。
feedbackPanelWartung12 vs. 065DFC0DD1DC51103CC5FFEE61F2AE12
为了进一步复杂化,我的FeedbackPanel位于已包含FeedbackPanel(继承自其超类)的页面中的Panel中包含的RepeatingView中。结构如下:
我的页面
public MyPage extends MySuperPage{
//Constructors were left out
//this method is called in the onInitialize of some
//super class.
@Override
protected Component newContent() {
setFeedbackPanelFilter();
return new MyContainerPanel();
}
//this FeedbackPanel shall not recieve messages from child containers
private void setFeedbackPanelFilter() {
((FeedbackPanel) this.get("feedback"))
.setFilter( new ContainerFeedbackMessageFilter(this) {
@Override
public boolean accept(FeedbackMessage message) {
return !super.accept(message);
}
});
}
}
MyContainerPanel
public MyContainerPanel extends Panel {
//Constructors were left out
@Override
protected void onInitialize() {
super.onInitialize();
RepeatingView repeater = new RepeatingView("repeater");
add(repeater);
for (Object o : objects) {
String id = repeater.newChildId();
repeater.add(new MyPanel(id,o));
}
}
}
MyPanel
public MyPanel extends Panel {
private Object o;
private CheckBox chkBox;
private DateTimeField startDate, endDate;
private TextField<String> message;
private Form<Object> form;
private AjaxButton button;
private Label name;
private FeedbackPanel feedbackPanel;
//Constructors were left out
@Override
protected void onInitialize() {
super.onInitialize();
initFields();
addFields();
addAjaxButton();
addAjaxFormComponentUpdatingBehavior();
if (!o.isMaintenance())
disableFields();
}
private void addAjaxButton() {
button = new AjaxButton("submit") {
@Override
public void onSubmit(final AjaxRequestTarget target, final Form<?> form) {
//do something
feedbackPanel.success("Speichern erfolgreich");
target.addChildren(AppWartungPanel.this.getPage(), FeedbackPanel.class);
}
};
form.add(button);
}
private void addAjaxFormComponentUpdatingBehavior() {
chkBox.add(new AjaxFormComponentUpdatingBehavior("onchange") {
@Override
protected void onUpdate(AjaxRequestTarget target) {
switchVisibility();
target.add(startDate);
target.add(endDate);
target.add(message);
target.add(feedbackPanel);
}
});
}
private void switchVisibility() {
if (o.isMaintenance())
enableFields();
else
disableFields();
}
private void addFields() {
add(form);
form.add(feedbackPanel);
form.add(chkBox);
form.add(startDate);
form.add(endDate);
form.add(message);
form.add(name);
}
private void initFields() {
form = new Form<WartungDAO>("form", AppWartungPanel.this.getModel());
chkBox = new CheckBox("wartung", new PropertyModel<Boolean>(o, "wartung"));
chkBox.setOutputMarkupId(true);
startDate = new DateTimeField("startDate", new PropertyModel<Date>(o, "startDate"));
startDate.setOutputMarkupId(true);
startDate.setRequired(true);
endDate = new DateTimeField("endDate", new PropertyModel<Date>(o, "endDate"));
endDate.setOutputMarkupId(true);
endDate.setRequired(true);
message = new TextField<String>("message", new PropertyModel<String>(o, "message"));
message.setOutputMarkupId(true);
message.setRequired(true);
name = new Label("name", new PropertyModel<String>(o, "portal"));
feedbackPanel = new FeedbackPanel("feedbackPanelWartung");
feedbackPanel.setOutputMarkupId(true);
feedbackPanel.setFilter(new ContainerFeedbackMessageFilter(this));
}
private void disableFields() {
startDate.setEnabled(false);
endDate.setEnabled(false);
message.setEnabled(false);
}
private void enableFields() {
startDate.setEnabled(true);
endDate.setEnabled(true);
message.setEnabled(true);
}
}
我的页面
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<body class="BG_MAIN">
<div class="grid_16 BG1_GLOBAL">
<div style="margin:10px;">
<div class="grid_3 alpha">
<wicket:container wicket:id="menu"></wicket:container>
</div>
<div class="grid_12 omega">
<div class="INHALT">
<h1 wicket:id="appHeader" style="margin-top: 0;"></h1>
<div wicket:id="wartung" />
<div wicket:id="feedback"></div>
<wicket:container wicket:id="content"></wicket:container>
</div>
</div>
</body>
</html>
MyContainerPanel
<html xmlns:wicket="http://wicket.apache.org">
<wicket:panel>
<div wicket:id="repeater">
</div>
</wicket:panel>
</html>
MyPanel
<html xmlns:wicket="http://wicket.apache.org">
<wicket:panel>
<div style="margin-left: 25px; margin-top: 25px;">
<form wicket:id="form">
<h2 wicket:id="name"></h2>
<div wicket:id="feedbackPanelWartung"></div>
<table style="border: none;">
<tbody>
<tr>
<td style="border: none;">Wartung aktiv?</td>
<td style="border: none;">
<input wicket:id="wartung" type="checkbox" />
</td>
</tr>
<tr>
<td style="border: none;">Nachricht zum Anzeigen:</td>
<td style="border: none;">
<input wicket:id="message" type="text" size="50" />
</td>
</tr>
<tr>
<td style="border: none;">Startdatum</td>
<td style="border: none;">
<div wicket:id="startDate"></div>
</td>
</tr>
<tr>
<td style="border: none;">Enddatum</td>
<td style="border: none;">
<div wicket:id="endDate"></div>
</td>
</tr>
<tr>
<td style="border: none;"></td>
<td style="border: none;">
<input wicket:id="submit" type="submit" value="Speichern" style="float: right;" />
</td>
</tr>
</tbody>
</table>
</form>
</div>
</wicket:panel>
</html>
我只能猜测错误是由于页面的复杂性造成的。
我还禁用AjaxFormComponentUpdatingBehavior
以检查它是否与AjaxButton混淆 - 它没有。
我还使用普通Button实现了所有内容,以检查ContainerFeedbackMessageFilter和FeedbackPanels是否有效 - 他们确实如此。
AjaxButton对Page并不重要。但我真的很想理解,所以如果有人有另一个好主意试试......
答案 0 :(得分:0)
FeedbackPanel feedbackPanel = new FeedbackPanel("feedbackPanelWartung") {
@Override
public String getMarkupId() {
return "feedbackPanelWartung." + someUniqueValuePassedToThePanel;
}
};
feedbackPanel.setOutputMarkupId(true);
幸运的是,我在面板的一个modelObject中有一个独特的值。然后我覆盖了Component.getMarkupId()方法,只需设置我的Id 工作就像一个魅力。
我还发现,方法feedbackPanel.setOutputMarkupId(true);
与我的错误信息无关
换句话说:即使我尝试为我的组件设置标记ID,它也从未在第一个位置设置,因此ajax组件理所当然地永远无法找到目标。