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https://issues.apache.org/jira/browse/WICKET-176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12497592
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Martijn Dashorst commented on WICKET-176:
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I don't think I want this in core: we already have
AjaxFormComponentUpdatingBehavior which already validates, and updates the
models in one go. The default of adding all feedback panels to the ajax request
target also seems a bit enthousiastic: this is better left to specific
applications (it is easy to implement yourself).
At best this belongs to extensions, or even better: wicketstuff-minis
> Introduce AjaxFormElementValidatingBehavior
> -------------------------------------------
>
> Key: WICKET-176
> URL: https://issues.apache.org/jira/browse/WICKET-176
> Project: Wicket
> Issue Type: New Feature
> Components: wicket
> Affects Versions: 1.2.3
> Reporter: Erik van Oosten
> Assigned To: Eelco Hillenius
> Fix For: 1.3.0, 2.0
>
> Attachments: AjaxFormComponentValidatingBehavior.java,
> AjaxFormComponentValidatingBehavior.java
>
>
> There is currently no easy way to validate a single form element using Ajax.
> Please add attached code to the Wicket-core.
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