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https://issues.apache.org/jira/browse/WICKET-5013?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13566793#comment-13566793
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Christoph Leiter commented on WICKET-5013:
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Now that was difficult to reproduce in a quickstart. It happened only if I
added the DebugBar. I traced it further down and this happens because
getPage().detach() is called (inside DebugBar somewhere, to measure page size).
This method calls MarkupContainer#detachChildren and there is this:
// We need to keep InlineEnclosures for Ajax
request handling.
// TODO this is really ugly. Feature request
for 1.5: change auto-component that
// they don't need to be removed anymore.
if (component.isAuto() && !(component
instanceof InlineEnclosure))
{
children_remove(i);
}
If I add && !(component instanceof Enclosure) it avoids the problem. I don't
have a any real insight how auto components work and so I'm quite certain that
this is the wrong approach. :)
I'll add a quickstart so that someone can have a look at it.
> Wicket Enclosure fails with more than one component
> ---------------------------------------------------
>
> Key: WICKET-5013
> URL: https://issues.apache.org/jira/browse/WICKET-5013
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 6.3.0
> Environment: Sun JDK 1.7.0_11
> Ubuntu 12.10
> Reporter: Magne Rasmussen
> Attachments: WICKET-5013.zip
>
>
> An enclosure like:
> <wicket:enclosure child="message">
> <span wicket:id="message" />
> <a href="#" wicket:id="link"></a>
> </wicket:enclosure>
> fails with:
> org.apache.wicket.WicketRuntimeException: The component(s) below failed to
> render. Possible reasons could be that: 1) you have added a component in code
> but forgot to reference it in the markup (thus the component will never be
> rendered), 2) if your components were added in a parent container then make
> sure the markup for the child container includes them in <wicket:extend>.
> 1. [ExternalLink [Component id = link]]
> It will report failed rendering for all components within the enclosure
> except the child.
> This works if I turn the enclosure into an inline enclosure:
> <div wicket:enclosure="message">
> <span wicket:id="message" />
> <a href="#" wicket:id="link"></a>
> </div>
> I got this error when upgrading from Wicket 6.2.0 to 6.3.0.
> I also noticed that the AjaxEnclosureListener only visits the
> InlineEnclosures.
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