attribute_method_suffix(*suffixes) public

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

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

to 

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

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

For example: 

  class Person

    include ActiveModel::AttributeMethods
    attr_accessor :name
    attribute_method_suffix '_short?'
    define_attribute_methods [:name]

    private

    def attribute_short?(attr)
      send(attr).length < 5
    end
  end

  person = Person.new
  person.name = "Bob"
  person.name          # => "Bob"
  person.name_short?   # => true
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