define_attribute_methods

define_attribute_methods(*attr_names)

Instance Public methods

Declares the attributes that should be prefixed and suffixed by ActiveModel::AttributeMethods.

To use, pass attribute names (as strings or symbols), be sure to declare define_attribute_methods after you define any prefix, suffix or affix methods, or they will not hook in.

class Person
  include ActiveModel::AttributeMethods
 
  attr_accessor :name, :age, :address
  attribute_method_prefix 'clear_'
 
  # Call to define_attribute_methods must appear after the
  # attribute_method_prefix, attribute_method_suffix or
  # attribute_method_affix declares.
  define_attribute_methods :name, :age, :address
 
  private
 
  def clear_attribute(attr)
    send("#{attr}=", nil)
  end
end

Links:

https://github.com/rails/rails/blob/a6da73f975892635e6a0bcbfe8eb8410fcbb07a4/activemodel/lib/active_model/attribute_methods.rb#L251

doc_ruby_on_rails

2025-01-10 15:47:30

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