module I18n::Backend::Fallbacks
Public Instance Methods
exists?(locale, key)
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Calls superclass method
# File lib/i18n/backend/fallbacks.rb, line 73 def exists?(locale, key) I18n.fallbacks[locale].each do |fallback| begin return true if super(fallback, key) rescue I18n::InvalidLocale # we do nothing when the locale is invalid, as this is a fallback anyways. end end false end
extract_non_symbol_default!(options)
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# File lib/i18n/backend/fallbacks.rb, line 64 def extract_non_symbol_default!(options) defaults = [options[:default]].flatten first_non_symbol_default = defaults.detect{|default| !default.is_a?(Symbol)} if first_non_symbol_default options[:default] = defaults[0, defaults.index(first_non_symbol_default)] end return first_non_symbol_default end
translate(locale, key, options = {})
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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 throw MissingTranslation as usual.
The default option takes precedence over fallback locales only when it's a Symbol. When the default contains a String, Proc or Hash it is evaluated last after all the fallback locales have been tried.
Calls superclass method
# File lib/i18n/backend/fallbacks.rb, line 37 def translate(locale, key, options = {}) return super unless options.fetch(:fallback, true) return super if options[:fallback_in_progress] default = extract_non_symbol_default!(options) if options[:default] begin options[:fallback_in_progress] = true I18n.fallbacks[locale].each do |fallback| begin catch(:exception) do result = super(fallback, key, options) return result unless result.nil? end rescue I18n::InvalidLocale # we do nothing when the locale is invalid, as this is a fallback anyways. end end ensure options.delete(:fallback_in_progress) end return if options.key?(:default) && options[:default].nil? return super(locale, nil, options.merge(:default => default)) if default throw(:exception, I18n::MissingTranslation.new(locale, key, options)) end