[WICKET-6187] Enclosures rendered twice in derived component

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 7.3.0
• Fix Version/s: 8.0.0-M1, 7.4.0
• Assignee: Andrea Del Bene
• Reporter: Wolfgang Kritzinger
• Created: 19/Jun/16 05:31
• Updated: 21/Jun/16 17:51
• Resolved: 21/Jun/16 17:51

Description

Minimal changes to the Quickstart causes it:

Add this to the HomePage:

HomePage.html

<p wicket:enclosure="version">
    Please mention the correct Wicket version: <wicket:container wicket:id="version">1.5-SNAPSHOT</wicket:container>.
</p>
<wicket:child/>

And then a new derived page:

NewPage.java

public class NewPage extends HomePage {
    public NewPage(PageParameters parameters) {
        super(parameters);

        add(new Label("id", "test"));
    }
}

NewPage.html

<wicket:extend xmlns:wicket="http://wicket.apache.org">
    <div wicket:enclosure="id">
        xxx
        <wicket:container wicket:id="id"></wicket:container>
    </div>
</wicket:extend>

Will fail with the following exception:

org.apache.wicket.markup.MarkupException: The component [Component id = version] was rendered already. You can render it only once during a render phase. Class relative path: org.apache.wicket.markup.html.basic.Label:version
	at org.apache.wicket.Page.componentRendered(Page.java:211) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.Component.rendered(Component.java:2623) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.Component.internalRender(Component.java:2384) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.Component.render(Component.java:2308) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1521) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1724) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.MarkupContainer.renderComponentTagBody(MarkupContainer.java:1699) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.MarkupContainer.onComponentTagBody(MarkupContainer.java:1654) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.markup.html.panel.DefaultMarkupSourcingStrategy.onComponentTagBody(DefaultMarkupSourcingStrategy.java:70) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.Component.internalRenderComponent(Component.java:2565) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1663) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.Component.internalRender(Component.java:2380) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.Component.render(Component.java:2308) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1521) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1724) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.Page.onRender(Page.java:879) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.markup.html.WebPage.onRender(WebPage.java:141) ~[wicket-core-7.3.0.jar:7.3.0]
	at org.apache.wicket.Component.internalRender(Component.java:2380) ~.[wicket-core-7.3.0.jar:7.3.0]
.....

Issue Links

• relates to: WICKET-6088 Problem with queued components and setting the model