Method: ActiveModel::AttributeMethods::ClassMethods#attribute_method_suffix

Defined in:
lib/active_model/attribute_methods.rb

#attribute_method_suffix(*suffixes) ⇒ Object

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.

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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# File 'lib/active_model/attribute_methods.rb', line 143

def attribute_method_suffix(*suffixes)
  self.attribute_method_matchers += suffixes.map! { |suffix| AttributeMethodMatcher.new suffix: suffix }
  undefine_attribute_methods
end