I18n in Rails

📗 Translate Active Record

1. Define the dictionary at some yml files

The file name is not related. The term at the second level activerecord: works.

#config/locales/models_ja.yml
#config/locales/activerecords_ja.yml
#...etc

ja:
  activerecored:
    models:
      author: 著者
    attributes:
      author:
        name: 名前
        description: 概要

2. Use it in ERB

<div>
  <%= Author.model_name.human %>
  <%= Author.human_attribute_name :name %>
  <%= Author.human_attribute_name :description %>
</div>

📗 Translate any words

1. Define the dictionary at some yml files

• 😎 You can write words in split multiple files.
• 😎 You can write words with parameter, see also mail.registration_thanks.name_sir.
• 😎 You can write an array of words, see also date.day_names.

# config/locales/words.ja.yml
ja:
  labels:
    profile: プロフィール
  messages:
    sending: 送信中
    error: エラーが発生しました
  mail:
    registration:
      subject: "ご登録ありがとうございます🎉 %{name}様"

# config/locales/words.ja.yml
ja:
  date:
    day_names:
    - 日
    - 月
    - 火
    - 水
    - 木
    - 金
    - 土

2. Use it

<%= label_tag t('labels.profile') %>

<p><%= t('messages.sending') %></p>

# class RegistMailer < ApplicationMailer
@user.name = n350071
subject = I18n.t('mail.registration.subject', name: @user.name)
subject = I18n.t(:subject, scope: 'mail.registration', name: @user.name)

# => "ご登録ありがとうございます🎉 n350071様
# => "ご登録ありがとうございます🎉 n350071様

I18n.t('date.day_names')
# => "[\"日\", \"月\", \"火\", \"水\", \"木\", \"金\", \"土\"]"

📗 Localize Format

The formats reference.

Set your formats

en:
  date:
    formats:
      default: ! '%Y/%m/%d'
      long: ! '%Y/%m/%d/(%a)'
      short: ! '%m/%d'
      middle: ! '%b %d %a'

<%= l(@event.start_date, format: :middle) %>
#=> 'Nov 15 Fri'

default

<%=l Time.now, format: :short %>
I18n.l(Time.now, format: :short) #=> "2019/11/12 10:21"
I18n.l(Time.now, format: :long)  #=> "2019年11月12日(火) 10時21分41秒 +0900"

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🔗 Parent Note

My Rails note

n350071🇯🇵 ・ Sep 11 '19 ・ 3 min read

#rails