Rails - Oct 2006 - selects and validates_presence_of

I have an array of attributes that I use for select menus, and thus 
validations on those fields when theyre updated.

in my view i have something like:

<% select ''thing'', ''stuff'',
Thing.stuff_options, :allow_blank => true %>

and in my validations

validates_inclusion_of :stuff, :in => STUFF, :allow_nil => true


The problem being that blank != nil so the validation fails if the user 
picks the ''blank'' select option.


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Sorry the subject should read validates_inclusion_of.

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