Rails出生日期确认验证

class User < ApplicationRecord
  # 使用内置验证器
  validates :birth_date, presence: true
  validates :birth_date, format: { with: /\d{4}-\d{2}-\d{2}/, message: "must be in the format YYYY-MM-DD" }
  
  # 自定义验证器示例：确保用户至少18岁
  validate :minimum_age
  
  private
  
  def minimum_age
    if birth_date && Date.today.year - birth_date.year < 18
      errors.add(:birth_date, "must be at least 18 years old")
    end
  end
end

validates :birth_date, format: { with: /\d{4}-\d{2}-\d{2}/, message: "must be in the format YYYY-MM-DD" }

validate :minimum_age

private

def minimum_age
  if birth_date && Date.today.year - birth_date.year < 18
    errors.add(:birth_date, "must be at least 18 years old")
  end
end