vendor/rails/actionpack/lib/action_view/helpers/translation_helper.rb

   1 require 'action_view/helpers/tag_helper'
   2
   3 module ActionView
   4   module Helpers
   5     module TranslationHelper
   6       # Delegates to I18n#translate but also performs two additional functions. First, it'll catch MissingTranslationData exceptions
   7       # and turn them into inline spans that contains the missing key, such that you can see in a view what is missing where.
   8       #
   9       # Second, it'll scope the key by the current partial if the key starts with a period. So if you call translate(".foo") from the
  10       # people/index.html.erb template, you'll actually be calling I18n.translate("people.index.foo"). This makes it less repetitive
  11       # to translate many keys within the same partials and gives you a simple framework for scoping them consistently. If you don't
  12       # prepend the key with a period, nothing is converted.
  13       def translate(key, options = {})
  14         options[:raise] = true
  15         I18n.translate(scope_key_by_partial(key), options)
  16       rescue I18n::MissingTranslationData => e
  17         keys = I18n.send(:normalize_translation_keys, e.locale, e.key, e.options[:scope])
  18         content_tag('span', keys.join(', '), :class => 'translation_missing')
  19       end
  20       alias :t :translate
  21
  22       # Delegates to I18n.localize with no additional functionality.
  23       def localize(*args)
  24         I18n.localize *args
  25       end
  26       alias :l :localize
  27
  28
  29       private
  30         def scope_key_by_partial(key)
  31           if key.to_s.first == "."
  32             template.path_without_format_and_extension.gsub(%r{/_?}, ".") + key.to_s
  33           else
  34             key
  35           end
  36         end
  37     end
  38   end
  39 end