not_in

# File activerecord/lib/arel/predications.rb, line 112
    def not_in(other)
      case other
      when Arel::SelectManager
        Arel::Nodes::NotIn.new(self, other.ast)
      when Enumerable
        Nodes::NotIn.new self, quoted_array(other)
      else
        Nodes::NotIn.new self, quoted_node(other)
      end
    end