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https://issues.apache.org/jira/browse/WICKET-558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12495791
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Johan Compagner commented on WICKET-558:
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the current code does do this..
piece of Component.renderComponent :
beforeRender(); <<<<<<<<<<<<<<
// SOME code SKIPPED
// Render the component and all its children
render(markupStream);
}
finally
{
// Make sure the original markup stream is back
in place
parent.setMarkupStream(originalMarkupStream);
afterRender(); <<<<<<<<<<<<<<<<<<<<<<
> New attach->beforeRender refactor breaks ajax updating of list views
> --------------------------------------------------------------------
>
> Key: WICKET-558
> URL: https://issues.apache.org/jira/browse/WICKET-558
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.3.0
> Reporter: Jonathan Locke
> Assigned To: Johan Compagner
> Priority: Blocker
>
> Because components are created in onBeforeRender in list views (it calls
> populateItem then), it is necessary for AJAX renderings now to call
> beforeRender on every component to be updated before proceeding with the
> render. Since the current code does not do this, you get a NPE when
> rendering happens since the item was never populated.
> It looks like AjaxRequestTarget.respondComponent should call before render on
> the component tree (similar to how it does in Page) just before it's about to
> render. But I'm unsure if this is the right place to make the change.
> Johan can you look at this since you were doing this refactor and probably
> know all the details?
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