attribute_method_affix

Declares a method available for all attributes with the given prefix and suffix. Uses method_missing and respond_to? to rewrite the method.

#{prefix}#{attr}#{suffix}(*args, &block) 

to

#{prefix}attribute#{suffix}(#{attr}, *args, &block) 

An #{prefix}attribute#{suffix} instance method must exist and accept at least the attr argument.

class Person include ActiveModel::AttributeMethods attr_accessor :name attribute_method_affix prefix: 'reset_', suffix: '_to_default!' define_attribute_methods :name private def reset_attribute_to_default!(attr) send("#{attr}=", 'Default Name') end end person = Person.new person.name # => 'Gem' person.reset_name_to_default! person.name # => 'Default Name'