Re: [FormBuilder] How to validate input not in list?

On 3/6/07, Kevin Jordan <kjordan3 <at> gmail.com> wrote:
> I need to be able to validate that the information the user puts in a field
> on my form is NOT in a long list that I have in a file.
> The reason behind this being I never want the same value used twice.  For
> example, once a username is used, I don't want to allow someone to request
> it again.
>
> What is the best way to do this?

1) Add a unique DB constraint so bad data can't possibly get in

2) Write a \&check_username_is_unique callback function, and pass it
to validate for 'username'

-Nate
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