Regexp与自定义验证轨道匹配

Question

试图创建自定义验证方法，但得到错误

wrong number of arguments (0 for 1..3)

我想验证邮政编码的格式，但提供一个自定义的错误消息，而不是我在做时得到的消息

validates_format_of :postcode, with: /A^(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW])[ ]{0,1}[0-9][ABD-HJLNP-UW-Z]{2})$z/i, message: 'Please check your postcode'

这将给出的错误消息

postcode Please check your postcode

所以我想我可以做这个

class User < ActiveRecord::Base
validate :format_postcode
 def format_postcode
  regexp = /A^(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW])[ ]{0,1}[0-9][ABD-HJLNP-UW-Z]{2})$z/i
   if !postcode.match(regexp)
     errors.add[:base] << "Please check your Postcode"
   end
 end
end

但这是抛出错误

我在这里做错了什么？

感谢

Answer 1

问题出在这条线上

errors.add[:base] << "Please check your Postcode"

应该是

errors.add :base, "Please check your Postcode"

正如错误消息所示，add是一个接受1..3个参数的方法，而不是数组的getter。