accepts_nested_attributes_for - I18n / gettext翻译

Question

我有这个模型（Rails 4.2.7）：

class User < ActiveRecord::Base
 accepts_nested_attributes_for :pseudonyms, reject_if: proc { |attributes| attributes['name'].blank? }, allow_destroy: true
 has_many: pseudonyms
end


class Pseudonym < ActiveRecord::Base
   belongs_to :user
   validates :name, :presence => true
   validates :www, :presence => true
end

查看用户/编辑：

<%= form_for(@user) do |f| %>
  <%= f.fields_for :pseudonyms do |ff| %> 
    <%= f.form_group :name do |f| %>
        <%= f.text_field :name, class: 'form-control col-xs-12 ' %>
        <%= f.text_field :www, class: 'form-control col-xs-12 ' %>
    <% end %>
<% end %> 

  <%= link_to_add_association _("add another"), f, :pseudonyms, :class => "btn btn-sm btn-primary pull-right" %>
<% end %>

当我用空名或www保存时，我收到消息：

  

Www不能为空。

我已尝试过所有这些组合（en.yml）：

    en:
      activerecord:
        models:
          user:
            pseudonyms.name: "Pseudonym"
            pseudonyms.www: "Website"
            pseudonym.name: "Pseudonym"
            pseudonym.www: "Website"
            pseudonyms:
              name: "Pseudonym"
              www: "Website"
            pseudonym:
              name: "Pseudonym"
              www: "Website" 
          pseudonym:
            name: "Pseudonym"
            www: "Website"
          user/pseudonyms:
            name: "Pseudonym"
            www: "Website"
          user/pseudonym:
            name: "Pseudonym"
            www: "Website"
        attributes:
          user/pseudonyms:
            name: "Pseudonym"
            www: "Website"
          user/pseudonym:
            name: "Pseudonym"
            www: "Website"
          user:
            pseudonyms.name: "Pseudonym"
            pseudonyms.www: "Website"
            pseudonym.name: "Pseudonym"
            pseudonym.www: "Website"
            pseudonyms:
              name: "Pseudonym"
              www: "Website"
            pseudonym:
              name: "Pseudonym"
              www: "Website"

没有任何结果。有什么不对吗？

我更愿意使用gem gettext进行翻译，但这不是必需的。

谢谢， 大卫