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https://issues.apache.org/jira/browse/WICKET-6392?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16036694#comment-16036694
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Martin Grigorov commented on WICKET-6392:
-----------------------------------------
You should call `form.clearInput()` in addition to remove the old values.
The validation errors are in the FeedbackMessages associated with each invalid
FormComponent. You can use
`FeedbackCollector(form).collect().stream().forEach(fm ->
fm.setRendered(true))` to remove the errors.
> Can not change Model when form has Validation Errors
> ----------------------------------------------------
>
> Key: WICKET-6392
> URL: https://issues.apache.org/jira/browse/WICKET-6392
> Project: Wicket
> Issue Type: Bug
> Affects Versions: 8.0.0-M6
> Reporter: Kamil
>
> I have a Modal with Form and Submit button (it is used for creating new
> users).
> Form has several text fields bound to CompoundPropertyModel.
> Everytime I open the Modal, I set the ModelObject as new User();
> It works fine (fields "see" new model if I cancel the window or if I sumbit
> it without erors).
> If Form has validation errors, even if i set compoundModel.setObject(new
> User()); fields have old value and validation erros are present.
> I found
> [workaround|https://stackoverflow.com/questions/8879775/apache-wicket-how-to-update-model-after-validation-error]
> but I believe it should be possible with Wicket without "workarounds"
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