I just didn't follow that code... because I wasn't sure enough how would it
handle the data,
by that I mean... how does rails know wich one is the data that is going to
be validated and the data used for the validation,
I was searching and I guess the that a solution can be made with Proc.new
validates :minimun_value,
:uniqueness => {:scope=> [:group_id]},
:exclusion => { :in => Proc.new{|r|
[(r.minimun_value)..(r.maximun_value)]}}
(the model Scale belongs_to Group, and Group has_many scales)
but nothing happens. I choose Proc.new because (as far as I understood) it
let me go through the entire table, is that correct?
Javier Q.
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