lib/grape/api.rb in grape-0.2.2 vs lib/grape/api.rb in grape-0.2.3

@@ -128,13 +128,16 @@
       # May be `:json` or `:txt`.
       def format(new_format = nil)
         new_format ? set(:format, new_format.to_sym) : settings[:format]
       end
 
-      # Specify the format for error messages.
-      # May be `:json` or `:txt` (default).
-      def error_format(new_format = nil)
-        new_format ? set(:error_format, new_format.to_sym) : settings[:error_format]
+      # Specify a custom formatter for a content-type.
+      def formatter(content_type, new_formatter)
+        settings.imbue(:formatters, content_type.to_sym => new_formatter)
+      end
+
+      def error_formatter(format, new_formatter)
+        settings.imbue(:error_formatters, format.to_sym => new_formatter)
       end
 
       # Specify additional content-types, e.g.:
       #   content_type :xls, 'application/vnd.ms-excel'
       def content_type(key, val)