[Rails] Re: radio box validation

Dis Tec wrote:
> I have created some radio boxes as follows:
>
> <% f.radio_button :usertype, "false" %>False
> <% f.radio_button :usertype, "true" %>True
>
> where usertpe is a boolean in the db
>
> I want to be able to create a default selection and I want to validate
> the options and ensure that for whatever reason there is always a check
> in one of the boxes...now I know a proper radio box config will always
> have one option selected. How do I validate? For example
> validates_prescence_of: usertype?

Any ideas how to do this?

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