Rails 3 ActiveModel嵌套类I18n

Question

在ruby中给出以下类定义：

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

如何使用i18n自定义错误信息。 例如，对话类的正确查找将是

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

但是Message类是什么？ 我试过了：

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"

它们都不起作用 任何想法或这是ActiveModel或I18n的错误吗？

Answer 1

使用/作为名称空间

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