attribute_method_prefix

attribute_method_prefix(*prefixes)

Instance Public methods

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

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

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

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

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

Links:

https://github.com/rails/rails/blob/a6da73f975892635e6a0bcbfe8eb8410fcbb07a4/activemodel/lib/active_model/attribute_methods.rb#L108

doc_ruby_on_rails

2025-01-10 15:47:30

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