exceptions.rb in i18n-1.14.0

- old
+ new

@@ -45,11 +45,11 @@
     end
   end
 
   class MissingTranslation < ArgumentError
     module Base
-      PERMITTED_KEYS = [:scope].freeze
+      PERMITTED_KEYS = [:scope, :default].freeze
 
       attr_reader :locale, :key, :options
 
       def initialize(locale, key, options = EMPTY_HASH)
         @key, @locale, @options = key, locale, options.slice(*PERMITTED_KEYS)
@@ -61,11 +61,21 @@
           keys << 'no key' if keys.size < 2
         end
       end
 
       def message
-        "translation missing: #{keys.join('.')}"
+        if options[:default].is_a?(Array)
+          other_options = ([key, *options[:default]]).map { |k| normalized_option(k).prepend('- ') }.join("\n")
+          "Translation missing. Options considered were:\n#{other_options}"
+        else
+          "Translation missing: #{keys.join('.')}"
+        end
       end
+
+      def normalized_option(key)
+        I18n.normalize_keys(locale, key, options[:scope]).join('.')
+      end
+
       alias :to_s :message
 
       def to_exception
         MissingTranslationData.new(locale, key, options)
       end