[Catalyst] html-widget IfThen constraint

[Stephen Keenan]

On Wed, 1 Mar 2006, Carl Franks wrote:

> I'd like to add a new constraint, which makes 1 or more fields
> required only if another named field is present.
> Something like:
> ->constraint( 'IfThen', 'cc', 'num', 'pin' )
>
> meaning 'num' and 'pin' are only required if 'cc' is present.
>
> Is IfThen a suitable name? Any better ideas?


I'd be happy to see this class of constraint added too. As for a name, 
Data::FormValidator has this as 'dependencies' and 'dependency_groups'.


Stephen

> Carl
>
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