ruby-on-rails - “You need to supply at least one validation”但存在Rails验证

Question

我有以下验证:

class Event < ActiveRecord::Base
  attr_accessible :starts, :ends

  validates :no_multi_day_events

  private
    def no_multi_day_events
      if (ends.day != starts.day)
        errors.add(:ends, "No multi-day events")
      end
    end
end

但是，当我尝试用此文本加载页面时，出现错误: You need to supply at least one validation
如何提供验证？

Answer 1

您应该调用:

validate :no_multi_day_events

并不是

validates :no_multi_day_events