Validates with :if

Question

I\'m trying to create a condition in which the attribute \'one\' is zero and the attribute \'two\' is one, then a model is not valid. But when I make:

Model.         


        

Answer 1

You can validate it in one line:

validates :one, :two, :presence => true, :if => Proc.new { |a| !(a.one == 0 && a.two == 1) }