Include class name and argument name in argument error

app/models/concerns/redis_cacheable.rb

@@ -8,7 +8,9 @@ module RedisCacheable
     def cached_attr_reader(*attributes)
       attributes.each do |attribute|
         define_method(attribute) do
-          raise ArgumentError, "Not a database attribute" unless self.has_attribute?(attribute)
+          unless self.has_attribute?(attribute)
+            raise ArgumentError, "`cached_attr_reader` requires the #{self.class.name}\##{attribute} attribute to have a database column"
+          end
 
           cached_attribute(attribute) || read_attribute(attribute)
         end