activerecord validation error i18n

hoge.rb

# app/models/hoge.rb
class Hoge < ApplicationRecord
  validates :foo, presence: true
  validates :bar, presence: true
  validates :foo, uniqueness: { scope: [:bar] }
end

ja.yml

# config/locales/ja.yml
---
ja:
  activerecord:
    errors:
      models:
        hoge:
          attributes:
            foo:
              taken: "foo と bar で一意でないとあかんねん"