lib/usher/util/generate.rb in usher-0.6.5 vs lib/usher/util/generate.rb in usher-0.6.6

@@ -19,17 +19,17 @@
             path.parts.each do |part|
               case part
               when String
                 result << part
               when Route::Variable::Glob
-                value = (params && params.delete(part.name)) || part.default_value || raise(MissingParameterException.new)
+                value = (params && params.delete(part.name)) || part.default_value || raise(MissingParameterException.new("expected a value for #{part.name}"))
                 value.each_with_index do |current_value, index|
                   part.valid!(current_value)
                   result << current_value.to_s
                   result << usher.delimiters.first if index != value.size - 1
                 end
               when Route::Variable
-                value = (params && params.delete(part.name)) || part.default_value || raise(MissingParameterException.new)
+                value = (params && params.delete(part.name)) || part.default_value || raise(MissingParameterException.new("expected a value for #{part.name}"))
                 part.valid!(value)
                 result << value.to_s
               end
             end
           else