module ActiveModel::AttributeMethods

attribute. This method can be overloaded to customize the behavior.
attribute method. If so, we tell +attribute_missing+ to dispatch the
+method_missing+ is called we check to see if there is a matching
+attribute_missing+ is like +method_missing+, but for attributes. When

def attribute_missing(match, ...)
  __send__(match.proxy_target, match.attr_name, ...)
end