Rails 3 ActiveModel 嵌套类 I18n

Question

给定 ruby​​ 中的以下类定义：

class Conversation
  class Message
    include ActiveModel::Validations
    attr_accessor :quantity
    validates :quantity, :presence => true
  end
end

How can you use i18n to customize to error message。 例如，Conversation 类的正确查找应该是

activemodel:
  errors:
    models:
      conversation:
        attributes:
          quantity:
            blank: "Some custom message"

但是 Message 类的它是什么？ 我尝试过：

activemodel:
  errors:
    models:
      conversation:
        message:
          attributes:
            quantity:
              blank: "Some custom message"

activemodel:
  errors:
    models:
      message:
        attributes:
          quantity:
            blank: "Some custom message"

activemodel:
  errors:
    models:
      conversation::message:
        attributes:
          quantity:
            blank: "Some custom message"

没有一个有效 有什么想法或者这是 ActiveModel 或 I18n 的错误吗？

Answer 1

使用 / 表示命名空间

activemodel:
  errors:
    models:
      conversation/message:
        attributes:
          quantity:
            blank: "Some custom message"