如何在Rails 3中本地化ActiveModel错误消息？

Question

class User
  include ActiveModel::Validations
  validates_presense_of :first_name
  validates_length_of :last_name, :in => 3..20, :too_long => "pick a shorter last name", :too_short => "pick a longer last name"

  attr_accessor :first_name, :last_name
end

你好吗

1. 本地化错误消息：first_name
2. 本地化错误消息：last_name

Answer 1

你正在使用没有数据库的模型，对吧？您必须使用ActiveModel的翻译类扩展您的类，如下所示：

class User
  [...]
  extend ActiveModel::Translation
  [...]