attribute_method_prefix(*prefixes) public

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

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

to 

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

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

For example: 

  class Person

    include ActiveModel::AttributeMethods
    attr_accessor :name
    attribute_method_prefix 'clear_'
    define_attribute_methods [:name]

    private

    def clear_attribute(attr)
      send("#{attr}=", nil)
    end
  end

  person = Person.new
  person.name = "Bob"
  person.name          # => "Bob"
  person.clear_name
  person.name          # => nil
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