attribute_method_affix

attribute_method_affix(*affixes)

Instance Public methods

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

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

1	`#{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'

Links:

https://github.com/rails/rails/blob/a6da73f975892635e6a0bcbfe8eb8410fcbb07a4/activemodel/lib/active_model/attribute_methods.rb#L179

doc_ruby_on_rails

2025-01-10 15:47:30

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