Proc command is not working on checking the inclusion

Question

I have a field called visit_time with two distinct values. They are "AM" and "PM"

I check the presence of the visit_time by the following validation syntax.

validates_presence_of :visit_time,
      message: "visit time is required"

Then I need to check the inclusion validation only if the visit_time is presence, for this I am using the Proc. But it is not working.

validates :visit_time,
        :inclusion  => { :in => [ 'AM', 'PM'],
                         :message    => "%{value} is not a valid time" },
        :if => Proc.new { |o| o.errors.empty? }

Let me know what's wrong on it. Is Proc is not working for inclusion ??? Thanks in advance.

Answer 1

如果您希望包含验证仅在存在时才运行，则应将Proc更改为：

if: Proc.new { |o| o.visit_time.present? }