# File lib/i18n/backend/fallbacks.rb, line 56 def extract_string_or_lambda_default!(options) defaults = Array(options[:default]) if index = find_first_string_or_lambda_default(defaults) options[:default] = defaults[0, index] defaults[index] end end
# File lib/i18n/backend/fallbacks.rb, line 64 def find_first_string_or_lambda_default(defaults) defaults.each_with_index { |default, ix| return ix if String === default || Proc === default } nil end
Overwrites the Base backend translate method so that it will try each locale given by I18n.fallbacks for the given locale. E.g. for the locale :"de-DE" it might try the locales :"de-DE", :de and :en (depends on the fallbacks implementation) until it finds a result with the given options. If it does not find any result for any of the locales it will then raise a MissingTranslationData exception as usual.
The default option takes precedence over fallback locales only when it's a Symbol. When the default contains a String or a Proc it is evaluated last after all the fallback locales have been tried.
# File lib/i18n/backend/fallbacks.rb, line 38 def translate(locale, key, options = {}) return super if options[:fallback] default = extract_string_or_lambda_default!(options) if options[:default] options[:fallback] = true I18n.fallbacks[locale].each do |fallback| begin result = super(fallback, key, options) return result unless result.nil? rescue I18n::MissingTranslationData end end options.delete(:fallback) return super(locale, nil, options.merge(:default => default)) if default raise(I18n::MissingTranslationData.new(locale, key, options)) end
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