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我試圖將一個片段嵌套到另一個片段中。一個列表視圖填充了父代片段(它的工作原理),現在我想在某些情況下第二個片段嵌套在第一個片段中。這裏是我的代碼來填充我的列表視圖:Wicket嵌套片段
@Override
protected void populateItem(final Item<Message> item) {
Message msg = item.getModelObject();
MessageFragment msgFragment = new MessageFragment("entry", "messageFragment", this, msg);
WebMarkupContainer msgRatingContainer = new WebMarkupContainer("messageRatingContainer");
msgRatingContainer.setVisible(false);
if(msg.getType() == MessageType.RESERVATION){
msgRatingContainer.add(new MessageRatingFragment("messageRatingContainer", "messageRatingFragment",this, msg));
msgRatingContainer.setVisible(true);
}
msgFragment.add(msgRatingContainer);
item.add(msgFragment);
}
的參與標記:
<li wicket:id="listView"><div wicket:id="entry"></div></li>
<wicket:fragment wicket:id="messageFragment">
<div class="MessageAlert">
My Parent fragment content
</div>
<div wicket:id="messageRatingContainer"></div>
<wicket:fragment wicket:id="messageRatingFragment">
My nested fragment content
</wicket:fragment>
</wicket:fragment>
如果我沒有任何嵌套片段(如果條件爲假)呈現在UI不如預期,如果條件爲真,我收到以下錯誤:
org.apache.wicket.WicketRuntimeException: The component(s) below failed to render. A common problem is that you have added a component in code but forgot to reference it in the markup (thus the component will never be rendered).
1. [MarkupContainer [Component id = messageRatingContainer]]
2. [MarkupContainer [Component id = messageRatingContainer]]
我想是一些與組件層次結構連接,但我無法找出哪些方法是正確的。
MarkupContainer「messageRatingContainer」總是通過msgFragment.add(msgRatingContainer)添加到標記中,實際上當我在if條件內添加嵌套片段時,問題發生不在外面(it msg.getType()!=它始終工作的MessageType.RESERVATION) – Wizche