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https://issues.apache.org/jira/browse/TAP5-860?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Howard M. Lewis Ship closed TAP5-860.
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Resolution: Fixed
Fix Version/s: 5.4
Assignee: Howard M. Lewis Ship
This has been addressed with the overall changes to client in 5.4.
> JavaScript errors when adding validations to checkboxes
> -------------------------------------------------------
>
> Key: TAP5-860
> URL: https://issues.apache.org/jira/browse/TAP5-860
> Project: Tapestry 5
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.2
> Reporter: Howard M. Lewis Ship
> Assignee: Howard M. Lewis Ship
> Fix For: 5.4
>
>
> Tapestry doesn't support validations on checkboxes out of the box (after all,
> it's either on or off). Perhaps supporting the required validator would not
> be so bad.
> However, it is reasonable to add a validator on the client side, for example,
> to implement "if this is selected, this must be checked as well" scenarios.
> Anyway, because $F() of a checkbox return nulls, this line fails
> if (!t.validationError && ! value.blank())
> because value is null
> This is in Tapestry.FieldEventManager.validateInput
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