event_news/app/models/event_news_custom_title.rb

class EventNewsCustomTitle
  include Mongoid::Document
  include Mongoid::Timestamps
  field :key
  field :title, type: String, localize: true
  KEYS = ['event_date','speaker','place','host']
  def self.get_map
    KEYS.map do |k|
      s = self.where(key: k).first || self.create(key: k,title_translations: I18n.available_locales.map{|l| [l,I18n.with_locale(l){I18n.t("event_news.#{k}")}]}.to_h)
      if s.title_translations.select{|k,v| v.include?("translation missing")}.length>0
        s.update_attributes(title_translations: I18n.available_locales.map{|l| [l,I18n.with_locale(l){I18n.t("event_news.#{k}")}]}.to_h)
      end
      s
    end
  end
  def default_title
    I18n.t("event_news.#{self.key}")
  end
  def self.get_trans(key)
    tmp = TitleMap[key][I18n.locale] rescue I18n.t("event_news.#{key}")
    tmp.blank? ? I18n.t("event_news.#{key}") : tmp
  end
  TitleMap = self.get_map.map{|v| [v.key,v.title_translations]}.to_h
end