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https://issues.apache.org/jira/browse/WICKET-6450?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sven Meier resolved WICKET-6450.
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Resolution: Duplicate
Assignee: Sven Meier
Indeed.
> FormComponent should not always create ArrayList when field is null
> -------------------------------------------------------------------
>
> Key: WICKET-6450
> URL: https://issues.apache.org/jira/browse/WICKET-6450
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 8.0.0-M6
> Reporter: Kamil
> Assignee: Sven Meier
> Attachments: showcase-notCreateArrayList.zip
>
>
> Sometimes we want to use Set as a backing object but FormComponent#L1600
> always creates new ArrayList.
> 1)Run the app
> 2)Click submit
> 3)See what happens.
> 4)Everything works when User#L13 is uncommented
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